Pedodontics: Tooth Reaction to Trauma Lec 11 Quiz
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Questions and Answers

What may cause the escape of red blood cells into the pulp chamber after trauma?

  • Increased pressure
  • Congestion of blood
  • Pulpal hyperemia
  • Rupture of capillaries (correct)
  • What is indicated by a reddish color change in the coronal portion of a tooth after trauma?

  • Pigment formation in dentinal tubules
  • Increased pressure within the pulp chamber
  • Internal hemorrhage
  • Pulpal hyperemia (correct)
  • How soon after the injury can a reddish color change in the tooth be evident?

  • Within 2 to 3 weeks (correct)
  • After a year
  • After several months
  • Immediately
  • In cases of internal hemorrhage, when is pigment formation evident in the dentinal tubules?

    <p>Within 2 to 3 weeks</p> Signup and view all the answers

    What does a reddish coronal portion of a tooth after trauma often indicate?

    <p>Poor prognosis</p> Signup and view all the answers

    What color change may be noticeable if bleeding into the pulp chamber is minor?

    <p>No noticeable change</p> Signup and view all the answers

    'In cases of this type' refers to which specific reaction to trauma in primary teeth?

    <p>'Darkgray discoloration'</p> Signup and view all the answers

    'The change in color is evident within 2 to 3 weeks after the injury' refers to which reaction to trauma?

    <p>'Internal hemorrhage'</p> Signup and view all the answers

    Which condition is characterized by partial or complete obliteration of the pulp chamber and canal?

    <p>Calcific metamorphosis</p> Signup and view all the answers

    What color may be observed in the crowns of teeth affected by calcific metamorphosis?

    <p>Yellowish</p> Signup and view all the answers

    What is the likely outcome for primary teeth experiencing calcific metamorphosis?

    <p>Normal root resorption</p> Signup and view all the answers

    What term is used to describe internal resorption when the vascular tissue of the pulp shines through the remaining thin shell of the tooth?

    <p>&quot;Pink spot&quot;</p> Signup and view all the answers

    Which process is generally believed to be caused by odontoclastic action?

    <p>Internal resorption</p> Signup and view all the answers

    What should be done if a permanent tooth shows signs of calcific changes as a result of trauma?

    <p>Keep it under observation or treat endodontically</p> Signup and view all the answers

    What illusion may a radiograph give in cases of calcific metamorphosis?

    <p>Complete obliteration with no remnants of pulp</p> Signup and view all the answers

    "Destructive process generally believed to be caused by odontoclastic action" refers to which condition?

    <p>&quot;Internal resorption&quot;</p> Signup and view all the answers

    What is another term used for the occurrence of a perforation in the pulp?

    <p>Pulpal hyperplasia</p> Signup and view all the answers

    In what scenario can a tooth be retained if endodontic procedures are initiated?

    <p>Displacement without root damage</p> Signup and view all the answers

    What is a potential outcome of a severe blow causing displacement to a tooth?

    <p>Pulpal necrosis</p> Signup and view all the answers

    How does a tooth with a coronal fracture differ in pulpal prognosis from a tooth sustaining a severe blow without fracturing the crown?

    <p>Better pulpal prognosis</p> Signup and view all the answers

    What might cause eventual necrosis of the pulp following an injury?

    <p>Severance of the apical vessels</p> Signup and view all the answers

    How could damage to both periodontal structures and pulp affect external root resorption?

    <p>Prevent external root resorption</p> Signup and view all the answers

    In what case may external root resorption become arrested, allowing the tooth to be retained?

    <p>Exceptional cases with arrested resorption</p> Signup and view all the answers

    What is the recommended treatment for a tooth with a necrotic pulp?

    <p>Extract the tooth</p> Signup and view all the answers

    Which type of dental injury has a 100% chance of developing pulp necrosis and external root resorption?

    <p>Lateral luxation</p> Signup and view all the answers

    What causes ankylosis in teeth?

    <p>Injury to the periodontal ligament</p> Signup and view all the answers

    How is ankylosis clinically evident in teeth?

    <p>Difference in the incisal plane compared to adjacent teeth</p> Signup and view all the answers

    What does the radiograph of an ankylosed tooth typically show?

    <p>Continuous appearance of dentin with alveolar bone</p> Signup and view all the answers

    When should an ankylosed anterior primary tooth be removed?

    <p>If it is causing delayed eruption of permanent successor</p> Signup and view all the answers

    What happens to an ankylosed permanent tooth during active eruption?

    <p>It becomes fixed in position</p> Signup and view all the answers

    What is often necessary when an ankylosed permanent tooth occurs during preteen or early teen years?

    <p>Tooth extraction of the ankylosed tooth</p> Signup and view all the answers

    Why may injuries to primary teeth involve permanent dentition?

    <p>Anatomic relationship between primary and permanent teeth</p> Signup and view all the answers

    What is a possible defect that can be seen in permanent teeth?

    <p>Turner tooth</p> Signup and view all the answers

    What type of dentin is produced by odontoblasts when there is severe injury to developing enamel?

    <p>Reparative dentin</p> Signup and view all the answers

    What occurs in a tooth after the intrusion or displacement of an anterior primary tooth?

    <p>Dilaceration</p> Signup and view all the answers

    What technique can be used to restore small hypoplastic defects in permanent teeth?

    <p>Resin bonding technique</p> Signup and view all the answers

    What are common treatments for ankylosed permanent teeth during preteen or early teen years?

    <p>Surgical repositioning or tooth extraction</p> Signup and view all the answers

    Why do subjacent odontoblasts produce reparative dentin?

    <p>To bridge the gap and protect the pulp from further injury</p> Signup and view all the answers

    What is the main difference between pulpal hyperemia and internal hemorrhage?

    <p>Presence of red blood cells in internal hemorrhage</p> Signup and view all the answers

    What indicates a poor prognosis in cases of pulpal hyperemia?

    <p>Reddish color change lasting several weeks</p> Signup and view all the answers

    In cases of internal hemorrhage, what happens if bleeding is minute?

    <p>Absence of any color change</p> Signup and view all the answers

    What can cause the crown of an injured tooth to retain discoloration for an indefinite period?

    <p>Pigment formation in dentinal tubules</p> Signup and view all the answers

    What is the likelihood of vitality in primary teeth with dark-gray discoloration due to internal hemorrhage?

    <p>Low</p> Signup and view all the answers

    What is the radiographic appearance of the pulp chamber and canal in cases of calcific metamorphosis?

    <p>Partial obliteration with remnants of the pulp</p> Signup and view all the answers

    What color change may be observed in the crowns of teeth undergoing calcific metamorphosis?

    <p>Yellowish and opaque</p> Signup and view all the answers

    What term is used to describe the process believed to be caused by odontoclastic action resulting in a 'pink spot' when the crown is affected?

    <p>Internal resorption</p> Signup and view all the answers

    What is the likely outcome for primary teeth experiencing calcific metamorphosis?

    <p>Normal root resorption</p> Signup and view all the answers

    At what rate can the destructive process of internal resorption progress?

    <p>Rapidly causing perforation within weeks</p> Signup and view all the answers

    What should be considered when a permanent tooth shows signs of calcific changes as a result of trauma?

    <p>Endodontic treatment observation or treatment</p> Signup and view all the answers

    'Pink spot' is a term used to describe which condition affecting the crown of a tooth after injury?

    <p><em>Internal resorption</em></p> Signup and view all the answers

    'Fine root canal and remnants of the pulp will persist' refers to the radiographic appearance in which dental condition?

    <p><em>Calcific metamorphosis</em></p> Signup and view all the answers

    What is a potential outcome of a severe blow causing displacement to a tooth?

    <p>Pulpal necrosis</p> Signup and view all the answers

    In what cases may external root resorption become arrested, allowing the tooth to be retained?

    <p>Following a severe trauma with tooth displacement</p> Signup and view all the answers

    What condition is characterized by partial or complete obliteration of the pulp chamber and canal?

    <p>Calcific metamorphosis</p> Signup and view all the answers

    Why may a tooth receiving an injury that causes coronal fracture have a better pulpal prognosis than one sustaining a severe blow without fracturing the crown?

    <p>The energy dissipates as the crown fractures</p> Signup and view all the answers

    What is generally believed to be caused by odontoclastic action?

    <p>External root resorption</p> Signup and view all the answers

    When might necrosis of the pulp not occur until several months after an injury?

    <p>Following a severe blow without fracturing the crown</p> Signup and view all the answers

    'The blow may cause a severance of the apical vessels' leading to what condition?

    <p>Pulpal necrosis</p> Signup and view all the answers

    'In exceptional cases, the resorption may become arrested, and the tooth may be retained' refers to which dental condition?

    <p>'Destructive process generally believed to be caused by odontoclastic action'</p> Signup and view all the answers

    What type of dentin is produced by subjacent odontoblasts in response to severe injury to developing enamel?

    <p>Tertiary dentin</p> Signup and view all the answers

    In cases of dilaceration, what characteristic is observed in the affected tooth?

    <p>Sharp bend in crown or root</p> Signup and view all the answers

    What term is used to describe the presence of a small, pigmented hypoplastic area in a permanent tooth?

    <p>Turner tooth</p> Signup and view all the answers

    Which condition may result from the removal of a permanent tooth that becomes ankylosed during the preteen or early teen years?

    <p>Pulp necrosis</p> Signup and view all the answers

    What defect may be observed in permanent teeth as a result of injuries to primary teeth involving the permanent dentition?

    <p>Gross malformations of the crown</p> Signup and view all the answers

    What tissue is observed to produce a reparative type of dentin when the thin enamel covering of a developing permanent tooth is severely damaged?

    <p>Odontoblasts</p> Signup and view all the answers

    What is the result of ankylosis caused by injury to the periodontal ligament?

    <p>Fusion between alveolar bone and root surface</p> Signup and view all the answers

    How is clinical evidence of ankylosis typically observed in affected teeth?

    <p>Fixed position compared to surrounding teeth</p> Signup and view all the answers

    What can be seen in a radiograph of an ankylosed tooth?

    <p>Periodontal membrane continuity</p> Signup and view all the answers

    When should an ankylosed anterior primary tooth be removed?

    <p>If it causes delayed eruption of permanent successor</p> Signup and view all the answers

    What distinguishes a tooth with ankylosis during active eruption from adjacent teeth?

    <p>Eruption and drifting</p> Signup and view all the answers

    What is the histological repair seen in cases of ankylosis that may contribute to its clinical manifestation?

    <p>Mechanical lock or fusion between bone and root surface</p> Signup and view all the answers

    What is a key feature that indicates a tooth's ankylosis in a radiograph?

    <p>Interruption in periodontal membrane</p> Signup and view all the answers

    How does ankylosis affect the eruption pattern of teeth compared to unaffected teeth?

    <p>Halts eruption and causes fixation</p> Signup and view all the answers

    When should an appliance be placed following the extraction of a tooth to prevent space closure?

    <p>Within 1 month</p> Signup and view all the answers

    Which primary molar loss results in the greatest amount of space closure in a quadrant?

    <p>Maxillary second primary molars</p> Signup and view all the answers

    What is the rate of space loss like during the first 6 months after tooth extraction?

    <p>Increases with time</p> Signup and view all the answers

    What factor influences the amount of space closure most significantly after primary molar loss?

    <p>Timing of the primary molar loss</p> Signup and view all the answers

    What happens to space closure potential if a primary molar loss occurs close to first permanent molar eruption?

    <p>Increases</p> Signup and view all the answers

    What is the effect of retaining a second primary molar after losing a first primary molar on space closure?

    <p>Minimizes space closure</p> Signup and view all the answers

    What may produce abnormal forces leading to the collapse of dental arches?

    <p>Untimely loss of primary teeth</p> Signup and view all the answers

    What deficiency range per quadrant may indicate the need for space regaining or comprehensive orthodontic treatment?

    <p>3 to 4 mm</p> Signup and view all the answers

    When is space maintenance not desirable during orthodontic treatment?

    <p>When permanent teeth need to be extracted</p> Signup and view all the answers

    Which factor influences planning due to its association with both space gain and space loss?

    <p>Growth of jaws</p> Signup and view all the answers

    What does Leeway space contribute to in estimating arch length adequacy?

    <p>Position of incisors</p> Signup and view all the answers

    What may cause distal drifting of the anterior dental segment after the loss of mandibular primary molars?

    <p>Thumb sucking habits</p> Signup and view all the answers

    What is the primary determinant of dental malocclusion according to the text?

    <p>Mesial-distal tooth size/arch size imbalance</p> Signup and view all the answers

    Which objective of space maintenance is related to esthetics and phonetics in case of anterior space maintenance?

    <p>Aiding in esthetics and phonetics</p> Signup and view all the answers

    What is the main purpose of a space maintainer?

    <p>Preserving the space created by premature loss of teeth</p> Signup and view all the answers

    In space maintenance, why should the appliance not impose excessive stress on adjacent teeth?

    <p>To allow for orthodontic movements</p> Signup and view all the answers

    What is a key characteristic that a space maintainer should have to prevent interference with the eruption of permanent teeth?

    <p>Being easily cleansable</p> Signup and view all the answers

    Why is preserving primate space an objective in space maintenance?

    <p>To keep the space created by tooth loss</p> Signup and view all the answers

    How do maxillary posterior spaces predominantly close?

    <p>By mesial tipping of the first molars</p> Signup and view all the answers

    How do mandibular spaces primarily close?

    <p>By distal tipping of the first molars</p> Signup and view all the answers

    How do lower molars behave during space loss movements?

    <p>They roll lingually</p> Signup and view all the answers

    What is the likely outcome if the first primary molar is lost during the eruption of the first permanent molar?

    <p>The second primary molar tips mesially into the space for the first premolar</p> Signup and view all the answers

    What happens if the loss of the second primary molar occurs after normal cuspal interdigitation has been established?

    <p>The degree of space loss decreases dramatically</p> Signup and view all the answers

    Why are predictions of tooth emergence unreliable in cases where bone covering has been destroyed by infection?

    <p>Because root development cannot be accurately assessed</p> Signup and view all the answers

    Why is knowledge of the usual eruption sequence important?

    <p>To predict the amount of available space for unerupted permanent teeth</p> Signup and view all the answers

    What could result from the delayed eruption of permanent teeth?

    <p>Need for a space maintainer appliance</p> Signup and view all the answers

    How does abnormal oral musculature influence dental arches?

    <p>It exerts abnormal pressure on dental arches</p> Signup and view all the answers

    What is the recommended course of action when permanent teeth are congenitally absent?

    <p>Holding the space until a fixed replacement is provided</p> Signup and view all the answers

    In what scenario would a space analysis in the mixed dentition be beneficial?

    <p>To predict available space for unerupted permanent teeth</p> Signup and view all the answers

    What effect can the premature loss of the mandibular primary 2nd molar have?

    <p>Delayed eruption of permanent teeth</p> Signup and view all the answers

    Pulpal hyperemia is characterized by congestion of blood within the ______ chamber

    <p>pulp</p> Signup and view all the answers

    Internal hemorrhage may result in pigment formation in the dentinal ______

    <p>tubules</p> Signup and view all the answers

    The color change in the crown of the injured tooth after trauma may indicate a ______ prognosis

    <p>poor</p> Signup and view all the answers

    In cases of internal hemorrhage, the color change in the dentinal tubules is evident within 2 to 3 weeks after the ______

    <p>injury</p> Signup and view all the answers

    In severe cases, there may be pigment formation in the dentinal tubules leading to a change in ______

    <p>color</p> Signup and view all the answers

    In primary teeth with dark-gray discoloration due to internal hemorrhage, the likelihood of ______ is apparently low

    <p>vitality</p> Signup and view all the answers

    In cases in which the injury to the developing permanent tooth is severe enough to remove the thin covering of developing enamel, the subjacent odontoblasts have been observed to produce a reparative type of ______

    <p>dentin</p> Signup and view all the answers

    Tooth with sharp bend in crown or root occurs after the intrusion or displacement of an anterior primary ______

    <p>tooth</p> Signup and view all the answers

    The close anatomic relationship between the apices of primary teeth and their developing permanent successor explains why injuries to primary teeth may involve permanent ______

    <p>dentition</p> Signup and view all the answers

    The presence of a small, pigmented hypoplastic area in permanent teeth has been referred to as Turner ______

    <p>tooth</p> Signup and view all the answers

    Small hypoplastic defects in permanent teeth may be restored by the ______ technique

    <p>resinbonding</p> Signup and view all the answers

    Ankylosed permanent teeth often require either surgical repositioning or the removal of a ______ tooth

    <p>permanent</p> Signup and view all the answers

    Calcific metamorphosis of the dental Pulp may lead to partial or complete obliteration of the pulp chamber and canal, resulting in a yellowish, opaque color of the tooth crown. Primary teeth with this condition usually undergo normal root resorption, while a permanent tooth with signs of calcific changes should be regarded as a potential focus of infection and may require observation or endodontic treatment. This reaction is known as _______

    <p>progressive canal calcification</p> Signup and view all the answers

    Internal resorption is a destructive process believed to be caused by odontoclastic action, and may be observed radiographically in the pulp chamber or canal within a few weeks or months after an injury. This process, if rapid, may cause perforation of the crown or root within a few weeks. Internal resorption is also described as a 'pink spot' because the vascular tissue of the pulp shines through the remaining thin shell of the tooth. This condition is known as _______

    <p>dystrophic calcification</p> Signup and view all the answers

    The crowns of teeth undergoing calcific metamorphosis may have a _______ color.

    <p>yellowish, opaque</p> Signup and view all the answers

    Primary teeth demonstrating calcific metamorphosis will usually undergo normal _______.

    <p>root resorption</p> Signup and view all the answers

    A permanent tooth showing signs of calcific changes as a result of trauma should be regarded as a potential focus of infection and may require observation or _______ treatment.

    <p>endodontic</p> Signup and view all the answers

    Internal resorption is generally believed to be caused by _______ action.

    <p>odontoclastic</p> Signup and view all the answers

    The occurrence referred of a perforation as “perforating hyperplasia of the pulp”  If detected early, the tooth may be retained when ______ procedures are instituted.

    <p>endodontic</p> Signup and view all the answers

    Peripheral (external) root resorption  Due to damage to the periodontal structures and the pulp may not become involved. In case of sever trauma with some displacement of the tooth  Gross areas of the root have been destroyed. In exceptional cases the resorption may become arrested, and the tooth may be ______.

    <p>retained</p> Signup and view all the answers

    A severe blow to a tooth causing displacement often results in ______.

    <p>pulpal necrosis</p> Signup and view all the answers

    In some cases the necrosis may not occur until several months after the injury. A tooth receiving an injury that causes coronal fracture may have a better pulpal prognosis than a tooth that sustains a severe blow without fracturing the crown. Because of that the energy dissipates as the crown fractures, rather than all of the energy’s being absorbed by the tooth’s supporting ______.

    <p>tissues</p> Signup and view all the answers

    The blow may cause a severance of the apical vessels, in which case the pulp undergoes autolysis and ______.

    <p>necrosis</p> Signup and view all the answers

    In a less severe type of injury, the hyperemia and slowing of blood flow through the pulpal tissue may cause eventual ______ of the pulp.

    <p>necrosis</p> Signup and view all the answers

    ______ is a condition caused by injury to the periodontal ligament and subsequent inflammation, which is associated with invasion by osteoclastic cells. The result is irregularly resorbed areas on the peripheral root surface. In histologic sections, repair can be seen that may cause a mechanical lock or fusion between alveolar bone and the root surface. Clinical evidence of ankylosis is seen as a difference in the incisal plane of the ankylosed tooth and adjacent teeth. The adjacent teeth continue to erupt, whereas the ankylosed tooth remains fixed in relation to surrounding structures. The radiograph may show an interruption in the periodontal membrane of the ankylosed tooth, and often the dentin may appear to be continuous with alveolar bone. The ankylosed anterior primary tooth should be removed if there is evidence of its causing delayed or ectopic eruption of the permanent successor. If ankylosis of a permanent tooth occurs during active eruption, eventually a discrepancy between the position of this tooth and its adjacent ones will be obvious. The uninjured teeth will continue to erupt and may drift, with a loss of arch length.

    <p>Ankylosis</p> Signup and view all the answers

    The tooth with a necrotic pulp should be extracted or treated with ______. Risk of pulp necrosis (from the lowest) Concussion, subluxation, extrusion, lateral luxation, intrusive luxation – 100% chances of pulp necrosis and external root resorption. Ankylosis is a condition caused by injury to the periodontal ligament and subsequent inflammation, which is associated with invasion by osteoclastic cells. The result is irregularly resorbed areas on the peripheral root surface. In histologic sections, repair can be seen that may cause a mechanical lock or fusion between alveolar bone and the root surface. Clinical evidence of ankylosis is seen as a difference in the incisal plane of the ankylosed tooth and adjacent teeth. The adjacent teeth continue to erupt, whereas the ankylosed tooth remains fixed in relation to surrounding structures. The radiograph may show an interruption in the periodontal membrane of the ankylosed tooth, and often the dentin may appear to be continuous with alveolar bone.

    <p>RCT</p> Signup and view all the answers

    A condition caused by injury to the periodontal ligament and subsequent inflammation, which is associated with invasion by osteoclastic cells. The result is irregularly resorbed areas on the peripheral root surface. In histologic sections, repair can be seen that may cause a mechanical lock or fusion between alveolar bone and the root surface. Clinical evidence of ankylosis is seen as a difference in the incisal plane of the ankylosed tooth and adjacent teeth. The adjacent teeth continue to erupt, whereas the ankylosed tooth remains fixed in relation to surrounding structures. The radiograph may show an interruption in the periodontal membrane of the ankylosed tooth, and often the dentin may appear to be continuous with alveolar bone. The ankylosed anterior primary tooth should be removed if there is evidence of its causing delayed or ectopic eruption of the permanent successor. If ankylosis of a permanent tooth occurs during active eruption, eventually a discrepancy between the position of this tooth and its adjacent ones will be obvious. The uninjured teeth will continue to erupt and may drift, with a loss of arch length.

    <p>Injury</p> Signup and view all the answers

    A condition caused by injury to the periodontal ligament and subsequent inflammation, which is associated with invasion by osteoclastic cells. The result is irregularly resorbed areas on the peripheral root surface. In histologic sections, repair can be seen that may cause a mechanical lock or fusion between alveolar bone and the root surface. Clinical evidence of ankylosis is seen as a difference in the incisal plane of the ankylosed tooth and adjacent teeth. The adjacent teeth continue to erupt, whereas the ankylosed tooth remains fixed in relation to surrounding structures. The radiograph may show an interruption in the periodontal membrane of the ankylosed tooth, and often the dentin may appear to be continuous with alveolar bone. The ankylosed anterior primary tooth should be removed if there is evidence of its causing delayed or ectopic eruption of the permanent successor. If ankylosis of a permanent tooth occurs during active eruption, eventually a discrepancy between the position of this tooth and its adjacent ones will be obvious. The uninjured teeth will continue to erupt and may drift, with a loss of arch length.

    <p>Osteoclastic</p> Signup and view all the answers

    A condition caused by injury to the periodontal ligament and subsequent inflammation, which is associated with invasion by ________ cells. The result is irregularly resorbed areas on the peripheral root surface. In histologic sections, repair can be seen that may cause a mechanical lock or fusion between alveolar bone and the root surface. Clinical evidence of ankylosis is seen as a difference in the incisal plane of the ankylosed tooth and adjacent teeth. The adjacent teeth continue to erupt, whereas the ankylosed tooth remains fixed in relation to surrounding structures. The radiograph may show an interruption in the periodontal membrane of the ankylosed tooth, and often the dentin may appear to be continuous with alveolar bone. The ankylosed anterior primary tooth should be removed if there is evidence of its causing delayed or ectopic eruption of the permanent successor. If ankylosis of a permanent tooth occurs during active eruption, eventually a discrepancy between the position of this tooth and its adjacent ones will be obvious. The uninjured teeth will continue to erupt and may drift, with a loss of arch length.

    <p>osteoclastic</p> Signup and view all the answers

    A condition caused by injury to the periodontal ligament and subsequent inflammation, which is associated with invasion by osteoclastic cells. The result is irregularly resorbed areas on the peripheral root surface. In histologic sections, repair can be seen that may cause a mechanical lock or fusion between alveolar bone and the root surface. Clinical evidence of ankylosis is seen as a difference in the incisal plane of the ankylosed tooth and adjacent teeth. The adjacent teeth continue to erupt, whereas the ankylosed tooth remains fixed in relation to surrounding structures. The radiograph may show an interruption in the periodontal membrane of the ankylosed tooth, and often the dentin may appear to be continuous with alveolar bone. The ankylosed anterior primary tooth should be removed if there is evidence of its causing delayed or ectopic eruption of the permanent successor. If ankylosis of a permanent tooth occurs during active eruption, eventually a discrepancy between the position of this tooth and its adjacent ones will be obvious. The uninjured teeth will continue to erupt and may drift, with a loss of arch length.

    <p>Irregularly</p> Signup and view all the answers

    In cases of internal hemorrhage, when is pigment formation evident in the dentinal tubules? Pigment formation is evident within ______ after the injury.

    <p>2 to 3 weeks</p> Signup and view all the answers

    The color change in the crown of the injured tooth after trauma may indicate a ______ prognosis.

    <p>poor</p> Signup and view all the answers

    In exceptional cases, the resorption may become arrested, and the tooth may be ______.

    <p>retained</p> Signup and view all the answers

    The presence of a small, pigmented hypoplastic area in permanent teeth has been referred to as Turner ______.

    <p>hypoplasia</p> Signup and view all the answers

    The blow may cause a severance of the apical vessels' leading to what condition?

    <p>necrosis</p> Signup and view all the answers

    What factor influences the amount of space closure most significantly after primary molar loss? ______ space contributes to estimating arch length adequacy.

    <p>Leeway</p> Signup and view all the answers

    A tooth may be retained if detected early, when endodontic procedures are instituted, to prevent __________ hyperplasia of the pulp

    <p>perforating</p> Signup and view all the answers

    Peripheral (external) root resorption may be arrested, allowing the tooth to be retained, if damage to the periodontal structures and the pulp does not become involved due to sever _________ with some displacement of the tooth

    <p>trauma</p> Signup and view all the answers

    Pulpal necrosis can result from a severe blow to a tooth causing displacement, often leading to _______ necrosis

    <p>pulpal</p> Signup and view all the answers

    In some cases, pulpal necrosis may not occur until several months after the injury, as the energy dissipates when the crown fractures, rather than being absorbed by the tooth's supporting ________

    <p>tissues</p> Signup and view all the answers

    A tooth receiving an injury that causes coronal fracture may have a better pulpal prognosis than a tooth that sustains a severe blow without fracturing the crown, as the energy dissipates when the crown fractures, rather than all of the energy being absorbed by the tooth's supporting ________

    <p>tissues</p> Signup and view all the answers

    Ankylosis is clinically evident when there is a difference in the incisal plane of the ankylosed tooth and adjacent teeth, and the adjacent teeth continue to erupt while the ankylosed tooth remains fixed in relation to surrounding _________

    <p>structures</p> Signup and view all the answers

    Calcific metamorphosis of the dental Pulp may lead to partial or complete obliteration of the pulp chamber and canal, resulting in a yellowish, opaque color of the tooth crown. Primary teeth with this condition usually undergo normal root resorption, while a permanent tooth with signs of calcific changes should be regarded as a potential focus of infection and may require observation or endodontic treatment. This reaction is known as _______

    <p>dystrophic calcification</p> Signup and view all the answers

    Internal resorption is a destructive process believed to be caused by odontoclastic action, and may be observed radiographically in the pulp chamber or canal within a few weeks or months after an injury. This process, if rapid, may cause perforation of the crown or root within a few weeks. Internal resorption is also described as a 'pink spot' because the vascular tissue of the pulp shines through the remaining thin shell of the tooth. This condition is known as _______

    <p>internal resorption</p> Signup and view all the answers

    In primary teeth with dark-gray discoloration due to internal hemorrhage, the likelihood of ______ is apparently low

    <p>calcific metamorphosis</p> Signup and view all the answers

    A permanent tooth showing signs of calcific changes as a result of trauma should be regarded as a potential focus of infection and may require observation or _______ treatment.

    <p>endodontic</p> Signup and view all the answers

    The occurrence referred of a perforation as 'perforating hyperplasia of the pulp'. If detected early, the tooth may be retained when _______ procedures are instituted.

    <p>endodontic</p> Signup and view all the answers

    Ankylosed permanent teeth often require either surgical repositioning or the removal of a ______ tooth

    <p>tooth</p> Signup and view all the answers

    In cases in which the injury to the developing permanent tooth is severe enough to remove the thin covering of developing enamel, the subjacent odontoblasts have been observed to produce a reparative type of ______.

    <p>dentin</p> Signup and view all the answers

    Ankylosed permanent teeth often require either surgical repositioning or the removal of a ______ tooth.

    <p>permanent</p> Signup and view all the answers

    In histologic sections, repair can be seen that may cause a mechanical lock or fusion between alveolar bone and the root surface. Clinical evidence of ankylosis is seen as a difference in the incisal plane of the ankylosed tooth and adjacent teeth. The adjacent teeth continue to erupt, whereas the ankylosed tooth remains fixed in relation to surrounding structures. The radiograph may show an interruption in the periodontal membrane of the ankylosed tooth, and often the dentin may appear to be continuous with alveolar bone. The ankylosed anterior primary tooth should be removed if there is evidence of its causing delayed or ectopic eruption of the permanent successor. If ankylosis of a permanent tooth occurs during active eruption, eventually a discrepancy between the position of this tooth and its adjacent ones will be obvious. The uninjured teeth will continue to erupt and may drift, with a loss of arch ______.

    <p>length</p> Signup and view all the answers

    In cases of internal hemorrhage, when is pigment formation evident in the dentinal tubules?

    <p>minor</p> Signup and view all the answers

    Internal resorption is a destructive process believed to be caused by odontoclastic action, and may be observed radiographically in the pulp chamber or canal within a few weeks or months after an injury. This process, if rapid, may cause perforation of the crown or root within a few weeks. Internal resorption is also described as a 'pink spot' because the vascular tissue of the pulp shines through the remaining thin shell of the tooth. This condition is known as _______.

    <p>internal resorption</p> Signup and view all the answers

    In some cases the necrosis may not occur until several months after the injury. A tooth receiving an injury that causes coronal fracture may have a better pulpal prognosis than a tooth that sustains a severe blow without fracturing the crown. Because of that the energy dissipates as the crown fractures, rather than all of the energy’s being absorbed by the tooth’s supporting ______.

    <p>structures</p> Signup and view all the answers

    Ankylosis is a condition caused by injury to the periodontal ligament and subsequent inflammation, which is associated with invasion by osteoclastic cells. The result is irregularly resorbed areas on the peripheral root surface. In histologic sections, repair can be seen that may cause a mechanical lock or fusion between alveolar bone and the root surface. Clinical evidence of ankylosis is seen as a difference in the incisal plane of the ankylosed ______ and adjacent teeth. The adjacent teeth continue to erupt, whereas the ankylosed ______ remains fixed in relation to surrounding structures. The radiograph may show an interruption in the periodontal membrane of the ankylosed ______, and often the dentin may appear to be continuous with alveolar bone. The ankylosed anterior primary ______ should be removed if there is evidence of its causing delayed or ectopic eruption of the permanent successor. If ankylosis of a permanent ______ occurs during active eruption, eventually a discrepancy between the position of this ______ and its adjacent ones will be obvious. The uninjured teeth will continue to erupt and may drift, with a loss of arch length.

    <p>tooth</p> Signup and view all the answers

    The tooth with a necrotic ______ should be extracted or treated with RCT. Risk of ______ necrosis (from the lowest) Concussion, subluxation, extrusion, lateral luxation, intrusive luxation – 100% chances of ______ necrosis and external root resorption.

    <p>pulp</p> Signup and view all the answers

    Ankylosis is a condition caused by injury to the periodontal ligament and subsequent inflammation, which is associated with ______ by osteoclastic cells. The result is irregularly resorbed areas on the peripheral root surface.

    <p>invasion</p> Signup and view all the answers

    The adjacent teeth continue to erupt, whereas the ______ tooth remains fixed in relation to surrounding structures. The radiograph may show an interruption in the periodontal membrane of the ______ tooth, and often the dentin may appear to be continuous with alveolar bone.

    <p>ankylosed</p> Signup and view all the answers

    The ankylosed anterior primary tooth should be removed if there is ______ of its causing delayed or ectopic eruption of the permanent successor.

    <p>evidence</p> Signup and view all the answers

    If ankylosis of a permanent tooth occurs during active eruption, eventually a ______ between the position of this tooth and its adjacent ones will be obvious.

    <p>discrepancy</p> Signup and view all the answers

    In cases in which the injury to the developing permanent tooth is severe enough to remove the thin covering of developing enamel, the subjacent odontoblasts have been observed to produce a reparative type of ______.

    <p>dentin</p> Signup and view all the answers

    Primary teeth demonstrating calcific metamorphosis will usually undergo normal _______.

    <p>eruption</p> Signup and view all the answers

    In some cases the necrosis may not occur until several months after the injury. A tooth receiving an injury that causes coronal fracture may have a better pulpal prognosis than a tooth that sustains a severe blow without fracturing the crown. Because of that the energy dissipates as the crown fractures, rather than all of the energy’s being absorbed by the tooth’s supporting ______.

    <p>structures</p> Signup and view all the answers

    In primary teeth with dark-gray discoloration due to internal hemorrhage, the likelihood of ______ is apparently low.

    <p>ankylosis</p> Signup and view all the answers

    What is the recommended treatment for a tooth with a necrotic pulp?

    <p>root canal</p> Signup and view all the answers

    The adjacent teeth continue to erupt, whereas the ______ tooth remains fixed in relation to surrounding structures. The radiograph may show an interruption in the periodontal membrane of the ______ tooth, and often the dentin may appear to be continuous with alveolar bone.

    <p>ankylosed</p> Signup and view all the answers

    What indicates a poor prognosis in cases of pulpal hyperemia?

    <p>pain</p> Signup and view all the answers

    The blow may cause a severance of the apical vessels, in which case the pulp undergoes autolysis and ______.

    <p>necrosis</p> Signup and view all the answers

    Sequence of eruption knowledge is important because it can help prevent arch length loss due to premature loss of a mandibular primary 2nd molar. For example, if the mandibular 2nd permanent molar erupts before the 2nd premolar, space loss can occur due to mesial forces exerted on the 1st permanent molar as the 2nd permanent molar erupts. This emphasizes the significance of understanding the __________ sequence.

    <p>usual eruption</p> Signup and view all the answers

    In cases of delayed eruption of permanent teeth, over-retained or ankylosed primary teeth, or impacted permanent teeth, the eruption process can be affected. An appliance may be necessary to hold the space until the permanent tooth erupts. This highlights the importance of addressing the causes of delayed eruption to prevent complications in the __________ process.

    <p>eruption</p> Signup and view all the answers

    During a space analysis in the mixed dentition, understanding the amount of available space for unerupted permanent teeth is crucial. This analysis can help in deciding the type of appliance, such as a space maintainer or a space regainer, that is most __________.

    <p>appropriate</p> Signup and view all the answers

    When dealing with the congenital absence of permanent teeth, dentists must decide whether to hold the space for a long time until a fixed replacement is provided or to allow the space to _________.

    <p>close</p> Signup and view all the answers

    Abnormal oral musculature or habits can exert abnormal pressure on dental arches, influencing the type and planning of space maintainers. Therefore, understanding and addressing abnormal oral musculature is essential in the proper placement of ________ maintainers.

    <p>space</p> Signup and view all the answers

    The absence of permanent teeth from birth is known as congenital absence. In such cases, dentists must decide whether to maintain the space for future replacement or allow it to _______.

    <p>close</p> Signup and view all the answers

    In cases of delayed eruption of permanent teeth, it is important to address the causative factors to prevent potential complications in the eruption process. These factors may include over-retained primary teeth or impacted permanent teeth, which can hinder the normal ________ of permanent teeth.

    <p>eruption</p> Signup and view all the answers

    Understanding the usual eruption sequence can help in predicting and managing potential space loss issues that may arise due to premature loss of primary teeth or delayed eruption of permanent teeth. This knowledge can aid in implementing timely interventions such as space maintainers to prevent unfavorable ________ changes.

    <p>arch</p> Signup and view all the answers

    Thumb or finger habits may similarly produce abnormal forces in initiating collapse of the dental arches after untimely loss of primary teeth. Arch Length Adequacy will be estimated by position of incisors, Leeway ______ and incisor liability.

    <p>space</p> Signup and view all the answers

    If there is no question that permanent teeth will have to be removed to obtain a favorable occlusion, ______ maintenance may not be desirable because the ______ would need to be closed during orthodontic treatment anyway.

    <p>space</p> Signup and view all the answers

    Some of these ______ are: growth of jaws, proximal caries, wear and attrition. Miscellaneous Factors influence planning because they may be associated with either space gain or space loss.

    <p>factors</p> Signup and view all the answers

    If analysis indicates a positive arch length or deficiency of less than 1 to 2 mm per quadrant, a ______ maintainer may be beneficial in holding tooth position.

    <p>space</p> Signup and view all the answers

    A significant discrepancy exists where ______ regaining, serial extraction, and/or comprehensive orthodontic treatment may be indicated if the arch length deficiency is 2 to 3 mm or more per quadrant.

    <p>space</p> Signup and view all the answers

    The adjacent teeth continue to erupt, whereas the ankylosed ______ remains fixed in relation to surrounding structures. Clinical evidence of ankylosis is seen as a difference in the incisal plane of the ankylosed ______ and adjacent teeth.

    <p>tooth</p> Signup and view all the answers

    Internal resorption is a destructive process believed to be caused by odontoclastic action. This process, if rapid, may cause perforation of the crown or root within a few weeks.

    <p>spot</p> Signup and view all the answers

    In primary teeth with dark-gray discoloration due to internal hemorrhage, the likelihood of _____ is apparently low.

    <p>vitality</p> Signup and view all the answers

    The primary determinant of dental malocclusion is the mesial-distal tooth size/ arch size imbalance. Nevertheless, secondary factors can dramatically influence the deposition of dental arch during childhood. The environmental factors most commonly affecting dental arch status are :  Caries  Premature loss of primary teeth  It is defined as the process of maintaining a space in a given arch previously occupied by a tooth or a group of teeth. Space Maintainer : It is a fixed or removable appliance  Objectives of space maintenance designed to preserve the space created by the premature loss of a primary tooth or a group of teeth. 1.Preservation of primate space. 2.Preservation of the integrity of the dental arches. 3.Preservation of normal occlusal planes. 4.In case of anterior space maintenance, it ______ aid in esthetics and phonetics 1.Should maintain the desired proximal dimensions of the space created by the loss of tooth 2.Should not interfere with eruption of occluding teeth. 3.Should not interfere with the eruption of the replacing permanent teeth. 4.Should not interfere with speech, mastication or functional movement of mandible. 5.Should be simple and strong 6.Should not impose excessive stress on adjacent tooth, that means it's passive in not imposing pressures on remaining teeth that might affect orthodontic movements 7.Easily cleansable without enhancing dental caries or soft-tissue pathology. 8.

    <p>should</p> Signup and view all the answers

    In space maintenance, why should the appliance not impose excessive stress on adjacent ______?

    <p>teeth</p> Signup and view all the answers

    Ankylosed permanent teeth often require either surgical repositioning or the removal of a ______ tooth.

    <p>primary</p> Signup and view all the answers

    Tooth with sharp bend in crown or root occurs after the intrusion or displacement of an anterior primary ______

    <p>tooth</p> Signup and view all the answers

    Ankylosis is a condition caused by injury to the periodontal ligament and subsequent inflammation, which is associated with invasion by osteoclastic cells. The result is irregularly resorbed areas on the peripheral root surface. In histologic sections, repair can be seen that may cause a mechanical lock or fusion between alveolar bone and the root surface. Clinical evidence of ankylosis is seen as a difference in the incisal plane of the ankylosed tooth and adjacent teeth. The adjacent teeth continue to erupt, whereas the ankylosed tooth remains fixed in relation to surrounding structures. The radiograph may show an interruption in the periodontal membrane of the ankylosed tooth, and often the dentin may appear to be continuous with alveolar bone. The ankylosed anterior primary tooth should be removed if there is evidence of its causing delayed or ectopic eruption of the permanent successor. If ankylosis of a permanent tooth occurs during active eruption, eventually a discrepancy between the position of this tooth and its adjacent ones will be obvious. The uninjured teeth will continue to erupt and may drift, with a loss of arch ______.

    <p>length</p> Signup and view all the answers

    What effect can the premature loss of the mandibular primary 2nd molar have?

    <p>space</p> Signup and view all the answers

    What is the likely outcome for primary teeth experiencing ______ metamorphosis?

    <p>calcific</p> Signup and view all the answers

    What tissue is observed to produce a reparative type of dentin when the thin enamel covering of a developing permanent tooth is severely damaged?

    <p>odontoblasts</p> Signup and view all the answers

    Maxillary posterior spaces close predominantly by mesial bodily movement and mesiolingual rotation around the palatal root of the first permanent molars. Only minimal mesial crown tipping of the first molar is usually noted. In contrast, mandibular spaces close primarily by mesial tipping of the first permanent molars, along with distal movement and retroclination of teeth anterior to the space. Bodily movement of first molars is not typically notable in the lower arch as seen in the upper arch. Lower molars also tend to roll lingually in conjunction with their mesial crown-tipping during space loss movements. Direction of Space Closure: Maxillary spaces close by _______ movement and mandibular spaces close primarily by _______ of the first permanent molars.

    <p>mesial bodily movement, mesial tipping</p> Signup and view all the answers

    If the first primary molar is lost during the time of active eruption of the first permanent molar, a strong forward force will be exerted on the second primary molar, causing it to tip into the space required for the eruption of the first premolar. In addition, if the loss of the second primary molar occurs after the first permanent molars have fully erupted and normal cuspal interdigitation has been established, the degree of space loss should be less dramatic than earlier during molar transition. Eruption Status of the Adjacent Teeth: Loss of primary molars during active eruption may cause tipping of the adjacent teeth due to the force exerted by the _______ primary molar.

    <p>first</p> Signup and view all the answers

    Predictions of tooth emergence based on root development and the influence of the time of the primary tooth loss are not reliable if the bone covering the developing permanent tooth has been destroyed by _______. Amount of Bone Coverage Over the Tooth: Tooth emergence predictions may be inaccurate if the bone covering the developing tooth has been affected by _______

    <p>infection</p> Signup and view all the answers

    Internal resorption is generally believed to be caused by _______ action. Key cause of Internal Resorption: Internal resorption is thought to be primarily due to the action of _______

    <p>odontoclastic</p> Signup and view all the answers

    In cases of internal hemorrhage, the color change in the dentinal tubules is evident within 2 to 3 weeks after the _______. Timeline of Color Change: Color changes in the dentinal tubules occur within weeks after the occurrence of _______

    <p>hemorrhage</p> Signup and view all the answers

    Ankylosis is clinically evident when there is a difference in the incisal plane of the ankylosed tooth and adjacent teeth, and the adjacent teeth continue to erupt while the ankylosed tooth remains fixed in relation to surrounding _______. Clinical Sign of Ankylosis: Ankylosed teeth show a discrepancy in eruption compared to adjacent teeth due to the tooth being fixed in relation to surrounding _______

    <p>structures</p> Signup and view all the answers

    In a less severe type of injury, the hyperemia and slowing of blood flow through the pulpal tissue may cause eventual _______ of the pulp. Outcome of Pulpal Injury: Pulpal necrosis may occur as a result of decreased blood flow leading to the _______ of the pulp tissue.

    <p>necrosis</p> Signup and view all the answers

    Leeway space contributes to estimating arch length adequacy by providing additional space for the _______ teeth. Role of Leeway Space: Leeway space helps in estimating arch length by accommodating the eruption of _______ teeth.

    <p>permanent</p> Signup and view all the answers

    What guideline is used to predict the emergence of erupting premolars?

    <p>4 to 5 months for 1 mm of bone</p> Signup and view all the answers

    How is the eruption status of a succedaneous tooth estimated?

    <p>By the amount of root completion</p> Signup and view all the answers

    What is the importance of dental age compared to chronologic age?

    <p>Dental age is more important</p> Signup and view all the answers

    What may result from very early loss of a primary tooth before significant root formation of the permanent successor?

    <p>Delayed eruption timing</p> Signup and view all the answers

    What may lead to collapse of dental arches after untimely loss of primary teeth?

    <p>Thumb sucking habits</p> Signup and view all the answers

    What is the primary factor considered in determining the need for space maintenance after losing primary teeth?

    <p>Arch length deficiency</p> Signup and view all the answers

    What is the purpose of a space maintainer when there is a 2 to 3 mm arch length deficiency per quadrant?

    <p>Preventing space closure</p> Signup and view all the answers

    What may indicate that space maintenance is not desirable in orthodontic treatment?

    <p>Need for extraction of permanent teeth</p> Signup and view all the answers

    What is a common factor influencing space gain or loss in dental planning?

    <p>Growth of jaws</p> Signup and view all the answers

    What type of dentin is produced in response to severe injury to developing enamel?

    <p>Reparative dentin</p> Signup and view all the answers

    What does the radiograph show in cases of ankylosed teeth?

    <p>&quot;Pink spot&quot; appearance</p> Signup and view all the answers

    'Leeway space' contributes to estimating what aspect of dental arch adequacy?

    <p>&quot;Position of incisors&quot;</p> Signup and view all the answers

    How do maxillary posterior spaces predominantly close?

    <p>By mesial bodily movement and mesiolingual rotation around the palatal root of the first molars</p> Signup and view all the answers

    How do mandibular spaces primarily close?

    <p>By mesial tipping of the first molars</p> Signup and view all the answers

    What is not typically notable in lower arch regarding first molars' movement during space loss?

    <p>Bodily movement</p> Signup and view all the answers

    What happens if the second primary molar is lost after the first permanent molars have fully erupted?

    <p>Less dramatic space loss compared to earlier during molar transition</p> Signup and view all the answers

    Which teeth tend to roll lingually in conjunction with mesial crown-tipping during space loss movements?

    <p>Lower molars</p> Signup and view all the answers

    What happens if a strong forward force is exerted on the second primary molar due to the loss of the first primary molar?

    <p>Tipping into space required for eruption of the first premolar</p> Signup and view all the answers

    How does bone coverage over a developing permanent tooth affect tooth emergence predictions?

    <p>Predictions are not reliable if bone covering the tooth is destroyed by infection</p> Signup and view all the answers

    In what way do lower molars differ from upper molars during space loss movements?

    <p>Lower molars lack notable bodily movement</p> Signup and view all the answers

    What is the recommended timeframe for placing an appliance after the loss of a tooth to prevent space closure?

    <p>Within 6 months</p> Signup and view all the answers

    Which primary molar loss results in the greatest amount of space closure in a quadrant?

    <p>Loss of maxillary second primary molars</p> Signup and view all the answers

    When does maximum space loss occur after tooth extraction?

    <p>Within 6 months</p> Signup and view all the answers

    What contributes to estimating arch length adequacy after primary molar loss?

    <p>Growth of jaws</p> Signup and view all the answers

    What happens if a first primary molar is lost during the eruption of the first permanent molar?

    <p>Excessive space closure</p> Signup and view all the answers

    Which age group experiences the most space loss after tooth extraction?

    <p>Young children</p> Signup and view all the answers

    What is significant about the rate of space closure within the first 6 months of tooth extraction?

    <p>Most immediate loss happens within this time frame</p> Signup and view all the answers

    Why does the loss of a first primary molar with retention of the second primary molar show minimal space closure?

    <p>'Buttressing' effect of the second primary molar</p> Signup and view all the answers

    Why is the knowledge of the usual eruption sequence important?

    <p>To predict space loss due to premature tooth loss</p> Signup and view all the answers

    What can result from over-retained primary teeth or impacted permanent teeth during the eruption process?

    <p>Delayed eruption of permanent teeth</p> Signup and view all the answers

    In cases of delayed eruption, what may be needed to hold space until the permanent tooth erupts into a normal position?

    <p>Space maintainer appliance</p> Signup and view all the answers

    What is the primary consideration when deciding whether to hold the space for congenitally absent permanent teeth?

    <p>Duration until a fixed replacement can be provided</p> Signup and view all the answers

    How does abnormal oral musculature affect dental arches?

    <p>It exerts abnormal pressure on dental arches</p> Signup and view all the answers

    What is the result of traumatic injuries causing displacement to a tooth?

    <p>Loss of arch length</p> Signup and view all the answers

    What technique can be used to restore small hypoplastic defects in permanent teeth?

    <p>'No-drill' cavity repair method</p> Signup and view all the answers

    When might an ankylosed anterior primary tooth need removal?

    <p>If it causes delayed or ectopic eruption of permanent successor</p> Signup and view all the answers

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