Pedodontics Lec12 - Dental Malocclusion Factors
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Questions and Answers

Which factor can dramatically influence the deposition of dental arch during childhood?

  • Mesial-distal tooth size/arch size imbalance
  • Premature loss of primary teeth (correct)
  • Primate space preservation
  • Caries
  • What is the primary determinant of dental malocclusion?

  • Premature loss of primary teeth
  • Mesial-distal tooth size/arch size imbalance (correct)
  • Space Maintainer
  • Caries
  • What is the main objective of space maintenance in dentistry?

  • Interfering with occluding teeth eruption
  • Enhancing dental caries
  • Impose excessive stress on adjacent teeth
  • Maintaining esthetics and phonetics (correct)
  • What should a space maintainer avoid in terms of occluding teeth eruption?

    <p>Interfering with eruption of occluding teeth</p> Signup and view all the answers

    What characteristic should a space maintainer possess regarding adjacent teeth?

    <p>Passive in not imposing pressures on remaining teeth</p> Signup and view all the answers

    Why should a space maintainer be easily cleansable?

    <p>To avoid enhancing dental caries or soft-tissue pathology</p> Signup and view all the answers

    Which type of 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 should the appliance be placed after the loss of a tooth to prevent space closure?

    <p>Immediately after the loss of tooth</p> Signup and view all the answers

    What is the effect of losing a first primary molar with retention of the second primary molar on space closure?

    <p>Minimal amounts of space closure</p> Signup and view all the answers

    When does maximum space get lost after extraction?

    <p>Immediately within 76 hours</p> Signup and view all the answers

    What factor determines the amount of space closure when upper or lower first primary molars are lost?

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

    What happens when second primary molars are lost after the eruption of first permanent molars?

    <p>Significant space closure may still occur</p> Signup and view all the answers

    How do maxillary posterior spaces primarily close?

    <p>Mesial bodily movement and mesiolingual rotation around palatal roots</p> Signup and view all the answers

    How do mandibular spaces primarily close?

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

    What is typically noted in the lower arch regarding the bodily movement of first molars?

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

    What happens to lower molars during space loss movements?

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

    What happens when the first primary molar is lost during active eruption of the first permanent molar?

    <p>Second primary molar will tip into the space required for first premolar eruption</p> Signup and view all the answers

    Why are predictions unreliable when bone covering the developing permanent tooth is destroyed by infection?

    <p>Predictions become inaccurate</p> Signup and view all the answers

    What may produce abnormal forces in initiating collapse of dental arches after untimely loss of primary teeth?

    <p>Strong mentalis muscle patterns</p> Signup and view all the answers

    How is arch length adequacy estimated in orthodontic analysis?

    <p>By assessing the position of incisors, Leeway space, and incisor liability</p> Signup and view all the answers

    When does a significant arch length deficiency that requires space regaining or extraction exist according to the text?

    <p>2 to 3 mm or more per quadrant</p> Signup and view all the answers

    What factor may not make space maintenance desirable during orthodontic treatment?

    <p>Permanent teeth needing to be removed for occlusion adjustment</p> Signup and view all the answers

    Which factor influences planning due to its association with either space gain or space loss?

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

    What may have a pronounced negative effect after the loss of mandibular primary molars or canines?

    <p>Strong mentalis muscle patterns</p> Signup and view all the answers

    What can happen if the mandibular primary 2nd molar is prematurely lost and the mandibular 2nd permanent molar erupts before the 2nd premolar?

    <p>Arch length loss due to mesial forces on the 1st permanent molar</p> Signup and view all the answers

    What is a possible consequence of delayed eruption of permanent teeth, over-retained primary teeth, or impacted permanent teeth?

    <p>Delay in the eruption process</p> Signup and view all the answers

    What aids the practitioner in predicting the amount of available space for unerupted permanent teeth in the mixed dentition?

    <p>Space analysis</p> Signup and view all the answers

    What does the dentist need to decide if permanent teeth are congenitally absent?

    <p>Whether to hold the space or allow it to close</p> Signup and view all the answers

    How do abnormal oral musculature or habits influence dental arches?

    <p>They exert abnormal pressure on dental arches</p> Signup and view all the answers

    What may be needed if there is an over-retained primary tooth that is impacting the eruption process of permanent teeth?

    <p>Appliance to hold the space until permanent tooth eruption</p> Signup and view all the answers

    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 ______ space

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

    Space Maintainer : It is a fixed or removable ______

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

    Preservation of the integrity of the dental ______

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

    In case of anterior space maintenance, it should aid in esthetics and ______

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

    Should not interfere with eruption of occluding ______

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

    Should be simple and ______

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

    Should not impose excessive stress on adjacent tooth, that means it's passive in not imposing pressures on remaining teeth that might affect ______ movements

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

    Easily cleansable without enhancing dental caries or soft-tissue ______

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

    Loss of maxillary second primary molars results in the greatest amount of ______ closure, up to 8 mm of space loss in a quadrant.

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

    Loss of mandibular second primary molars shows the next greatest amount, up to 4 mm in a ______.

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

    Loss of upper or lower first primary molars shows almost equal amounts of space closure when compared with one another; the amount is most affected by timing of the first primary molar ______.

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

    Space loss potential is particularly high if the primary molar loss occurs in approximation to first permanent molar eruption, irrespective of which primary molar is lost and in which arch the loss ______.

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

    After first permanent molars have erupted into occlusion, loss of second primary molars may still result in significant space ______.

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

    Loss of a first primary molar with retention of the second primary molar shows minimal amounts of space closure because the second primary molar serves to buttress first permanent molar positions after occlusion is ______.

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

    The younger the patient, more is the space ______.

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

    Maximum space is lost during first 6 months of extraction and most immediate loss is within 76 ______.

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

    If the mandibular primary 2nd molar is prematurely lost and mandibular 2nd permanent molar is erupting before the 2nd premolar, arch length loss can occur due to mesial forces generated on the 1st permanent molar as the 2nd permanent molar ______

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

    Delayed eruption of permanent teeth, over-retained or ankylosed primary teeth, or impacted permanent teeth can result in a delay of the ______ process

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

    A space analysis conducted in the mixed dentition will aid the practitioner in a prediction of the amount of available space for the unerupted permanent ______

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

    Congenital absence of the permanent tooth may lead the dentist to decide whether to hold the space for many years until a fixed replacement can be provided or to allow the space to ______

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

    Abnormal oral musculature exert abnormal pressure on dental arches and may influence the type and planning of space ______

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

    With the removal of over-retained or ankylosed primary teeth, an appliance may be needed to hold the space until the permanent tooth erupts into a ______ position

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

    A decision may be made at this point on the type of appliance (space maintainer or space regainer) that is ______

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

    Abnormal oral habits will exert abnormal pressure on dental arches and may influence the type and planning of space ______

    <p>maintainer</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 ______ teeth.

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

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

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

    Some of these factors are: growth of jaws, proximal caries, wear and ______.

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

    Arch Length Adequacy will be estimated by position of incisors, Leeway space and incisor ______.

    <p>liability</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, space maintenance may not be desirable because the space would need to be closed during orthodontic ______ anyway.

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

    Strong mentalis muscle patterns may have a pronounced negative effect after loss of mandibular primary molars or canines, with collapse of the arch and the distal drifting of the anterior segment that is often ______.

    <p>exhibited</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 space maintainer may be beneficial in holding tooth ______.

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

    These factors influence planning because they may be associated with either space gain or space ______.

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

    If there is bone covering the crowns, it can be readily predicted that eruption will not occur for many months; insertion of a space-maintaining appliance is indicated. A guideline for predicting ______ is that erupting premolars usually require 4 to 5 months to move through 1 mm of bone as measured on a bite-wing radiograph. Eruption Status of the Succedaneous Tooth is estimated by the amount of root completion (tooth erupts in oral cavity after 2/3rd root formation), regardless of the child’s chronologic age. However, the eruption timing of a permanent successor may be delayed or accelerated after premature loss of a primary tooth, depending on the developmental status, bone density of the area, and nature of the primary tooth loss. Very early loss before significant root formation of the permanent successor usually results in delayed eruption timing. Dental Age of Patient is the age calculated according to the last tooth erupted in oral cavity in normal eruption sequence. This involves recognizing the teeth clinically present in the oral cavity in comparison to dental eruption charts. The chronologic age of the patient is not as important as the developmental age. Delayed eruption timing may alter normal transitional adjustments in arch length, arch width, and arch circumference.

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

    In such a situation the emergence of the ______ tooth is usually accelerated. If there is bone covering the crowns, it can be readily predicted that eruption will not occur for many months; insertion of a space-maintaining appliance is indicated. A guideline for predicting emergence is that erupting premolars usually require 4 to 5 months to move through 1 mm of bone as measured on a bite-wing radiograph. Eruption Status of the Succedaneous Tooth is estimated by the amount of root completion (tooth erupts in oral cavity after 2/3rd root formation), regardless of the child’s chronologic age. However, the eruption timing of a ______ successor may be delayed or accelerated after premature loss of a primary tooth, depending on the developmental status, bone density of the area, and nature of the primary tooth loss. Very early loss before significant root formation of the ______ successor usually results in delayed eruption timing. Dental Age of Patient is the age calculated according to the last tooth erupted in oral cavity in normal eruption sequence. This involves recognizing the teeth clinically present in the oral cavity in comparison to dental eruption charts. The chronologic age of the patient is not as important as the developmental age. Delayed eruption timing may alter normal transitional adjustments in arch length, arch width, and arch circumference.

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

    In such a situation the emergence of the permanent ______ is usually accelerated. If there is bone covering the crowns, it can be readily predicted that eruption will not occur for many months; insertion of a space-maintaining appliance is indicated. A guideline for predicting emergence is that erupting premolars usually require 4 to 5 months to move through 1 mm of bone as measured on a bite-wing radiograph. Eruption Status of the Succedaneous Tooth is estimated by the amount of root completion (______ erupts in oral cavity after 2/3rd root formation), regardless of the child’s chronologic age. However, the eruption timing of a permanent successor may be delayed or accelerated after premature loss of a primary ______, depending on the developmental status, bone density of the area, and nature of the primary ______ loss. Very early loss before significant root formation of the permanent successor usually results in delayed eruption timing. Dental Age of Patient is the age calculated according to the last ______ erupted in oral cavity in normal eruption sequence. This involves recognizing the teeth clinically present in the oral cavity in comparison to dental eruption charts. The chronologic age of the patient is not as important as the developmental age. Delayed eruption timing may alter normal transitional adjustments in arch length, arch width, and arch circumference.

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

    It is estimated by the amount of root completion (tooth erupts in oral cavity after 2/3rd root formation), regardless of the child’s chronologic age. However, the eruption timing of a permanent successor may be delayed or accelerated after premature loss of a primary tooth, depending on the developmental status, bone density of the area, and nature of the primary tooth loss. Very early loss before significant root formation of the permanent successor usually results in delayed eruption timing. Dental Age of Patient is the age calculated according to the last tooth erupted in oral cavity in normal eruption sequence. This involves recognizing the teeth clinically present in the oral cavity in comparison to dental eruption charts. The chronologic age of the patient is not as important as the developmental age. Delayed eruption timing may alter normal transitional adjustments in arch length, arch width, and arch circumference.

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

    It is estimated by the amount of root completion (tooth erupts in oral cavity after 2/3rd root formation), regardless of the child’s chronologic age. However, the eruption timing of a permanent ______ may be delayed or accelerated after premature loss of a primary tooth, depending on the developmental status, bone density of the area, and nature of the primary tooth loss. Very early loss before significant root formation of the permanent ______ usually results in delayed eruption timing. Dental Age of Patient is the age calculated according to the last tooth erupted in oral cavity in normal eruption sequence. This involves recognizing the teeth clinically present in the oral cavity in comparison to dental eruption charts. The chronologic age of the patient is not as important as the developmental age. Delayed eruption timing may alter normal transitional adjustments in arch length, arch width, and arch circumference.

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

    It is estimated by the amount of root completion (tooth erupts in oral cavity after 2/3rd root formation), regardless of the child’s chronologic age. However, the eruption timing of a permanent successor may be ______ or accelerated after premature loss of a primary tooth, depending on the developmental status, bone density of the area, and nature of the primary tooth loss. Very early loss before significant root formation of the permanent successor usually results in ______ eruption timing. Dental Age of Patient is the age calculated according to the last tooth erupted in oral cavity in normal eruption sequence. This involves recognizing the teeth clinically present in the oral cavity in comparison to dental eruption charts. The chronologic age of the patient is not as important as the developmental age. Delayed eruption timing may alter normal transitional adjustments in arch length, arch width, and arch circumference.

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

    This involves recognizing the teeth clinically present in the oral cavity in comparison to ______ eruption charts. The chronologic age of the patient is not as important as the developmental age. Delayed eruption timing may alter normal transitional adjustments in arch length, arch width, and arch circumference.

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

    This involves recognizing the teeth clinically present in the oral cavity in comparison to dental eruption charts. The chronologic ______ of the patient is not as important as the developmental ______. Delayed eruption timing may alter normal transitional adjustments in arch length, arch width, and arch circumference.

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

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