Periapical Inflammatory Lesions Quiz
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Questions and Answers

What can be said about the margins of periapical inflammatory lesions?

  • They tend to be poorly defined in longstanding lesions.
  • Acute lesions always demonstrate well defined margins.
  • Many longstanding lesions typically have relatively well defined margins. (correct)
  • They are always well defined.

    • What is a common feature associated with chronic periapical inflammatory lesions?

  • Increased tooth vitality.
  • Rapid onset of symptoms.
  • Adjacent reactive sclerosis. (correct)
  • Immediate resorption of the tooth.

    • How does the degree of sclerosis in periapical lesions typically vary?

  • It can vary from mild to extensive and depends on chronicity. (correct)
  • It remains unchanged in acute lesions.
  • It is consistent across all lesions regardless of chronicity.
  • It is always dense and extensive.

    • What radiographic change might be observed in the pulp chamber of a tooth with chronic periapical inflammatory lesions?

    <p>It may appear larger.</p> Signup and view all the answers

    What feature may indicate the presence of larger periapical lesions?

    <p>Effacement of the jaw cortices.</p> Signup and view all the answers

    Which type of enamel caries is characterized by penetration at least halfway through the enamel?

    <p>C-2</p> Signup and view all the answers

    What is the typical clinical appearance of carious lesions compared to their radiographic appearance?

    <p>They are usually larger clinically than radiographically.</p> Signup and view all the answers

    What can vary the appearance of a lesion confined to enamel during radiographic imaging?

    <p>Angle of the tube head</p> Signup and view all the answers

    Which radiographic feature is characteristic of early periapical inflammatory lesions?

    <p>Widened apical periodontal ligament space</p> Signup and view all the answers

    What is the radiographic presentation of advanced caries, particularly at the base of the enamel?

    <p>Triangle at the dentin-enamel junction</p> Signup and view all the answers

    Which type of periapical inflammatory lesion is characterized by an asymptomatic chronic condition?

    <p>Periapical granuloma</p> Signup and view all the answers

    Which radiographic method is mentioned as capable of detecting early periapical inflammatory changes that 2D radiography might miss?

    <p>Cone Beam Computed Tomography (CBCT)</p> Signup and view all the answers

    What factor significantly affects the overall radiographic contrast and subsequently the appearance of carious lesions?

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

    Which of the following is TRUE regarding cervical burnout?

    <p>Is often mistaken for a carious lesion.</p> Signup and view all the answers

    What can potentially obscure the bucco-lingual extent of a dental lesion on radiographs?

    <p>Limitations of two-dimensional imaging</p> Signup and view all the answers

    What morphology is typically demonstrated by a radicular cyst?

    <p>Spherical morphology</p> Signup and view all the answers

    What feature differentiates a lateral periodontal cyst from a radicular cyst?

    <p>Location related to the lateral canal</p> Signup and view all the answers

    What is a radiological feature of a residual cyst?

    <p>Corticated sclerotic borders</p> Signup and view all the answers

    What is a characteristic radiological feature of a dentigerous cyst?

    <p>Well-defined corticated lucent lesion</p> Signup and view all the answers

    Which type of cyst is most commonly associated with the third molars?

    <p>Dentigerous (Follicular) cyst</p> Signup and view all the answers

    What description best fits the borders of a periapical osseous dysplasia lesion?

    <p>Sclerotic rather than corticated</p> Signup and view all the answers

    What is a common consequence when a dentigerous cyst becomes acutely secondarily infected?

    <p>Focal regions of effacement of the corticated border</p> Signup and view all the answers

    What is typically absent in a residual cyst radiologically compared to a radicular cyst?

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

    Which statement regarding a KCOT (keratocystic odontogenic tumor) is true?

    <p>It has a relative lack of expansion</p> Signup and view all the answers

    What feature is associated with the corticated pericoronal lucency of a dentigerous cyst?

    <p>Extension to the cementoenamel junction</p> Signup and view all the answers

    Which is a typical feature of a buccal bifurcation cyst?

    <p>The lesion tends to extend posteriorly from the bifurcation.</p> Signup and view all the answers

    What is a radiological characteristic of an odontogenic keratocyst (OKC)?

    <p>It usually presents as unicystic and completely lucent internally.</p> Signup and view all the answers

    Which feature differentiates a dentigerous cyst from an odontogenic keratocyst?

    <p>Dentigerous cysts are associated with impacted teeth.</p> Signup and view all the answers

    What might indicate secondary infection in a buccal bifurcation cyst?

    <p>Periosteal new bone formation.</p> Signup and view all the answers

    How does an odontogenic keratocyst typically affect adjacent teeth?

    <p>It may displace teeth but to a lesser degree than dentigerous cysts.</p> Signup and view all the answers

    What is a common location for the odontogenic keratocyst?

    <p>Posterior mandible.</p> Signup and view all the answers

    What is the typical appearance of an odontogenic keratocyst on a radiograph?

    <p>Well-defined corticated border with possible scalloped appearance.</p> Signup and view all the answers

    How does the thickness of the corticated border in a simple bone cyst typically compare to that of a keratocystic odontogenic tumor?

    <p>Thinner and less well-defined.</p> Signup and view all the answers

    What is the typical location for lateral periodontal cysts?

    <p>On the lateral surface of a root</p> Signup and view all the answers

    What is a common effect of botryoid odontogenic cysts on teeth?

    <p>Effacement of the lamina dura</p> Signup and view all the answers

    Which feature distinguishes radicular cysts from lateral periodontal cysts?

    <p>Etiology related to lateral canals</p> Signup and view all the answers

    What is a key characteristic of keratocystic odontogenic tumors (KCOTs)?

    <p>Relatively non-expansile growth</p> Signup and view all the answers

    Where are glandular odontogenic cysts most commonly located?

    <p>In the anterior mandible</p> Signup and view all the answers

    What type of radiological features are associated with glandular odontogenic cysts?

    <p>Multilocular lesions with corticated borders</p> Signup and view all the answers

    What is a common clinical presentation of glandular odontogenic cysts?

    <p>Very slow progressive growth</p> Signup and view all the answers

    Which of the following conditions might be confused with a glandular odontogenic cyst?

    <p>Keratocystic odontogenic tumor</p> Signup and view all the answers

    Which cyst is known for having less effacement of lamina dura and root resorption?

    <p>Simple bone cyst</p> Signup and view all the answers

    What is a distinguishing feature of radicular cysts compared to odontogenic keratocysts?

    <p>Radicular cysts typically exhibit tear-drop appearance</p> Signup and view all the answers

    Which feature is common to both odontogenic myxoma and odontogenic keratocyst?

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

    Which syndrome is characterized by multiple KCOTs and other systemic abnormalities?

    <p>Basal cell naevus syndrome</p> Signup and view all the answers

    Lateral periodontal cysts arise from which type of epithelium?

    <p>Odontogenic epithelium</p> Signup and view all the answers

    How do the internal features of a KCOT compare to those of an ameloblastoma?

    <p>Ameloblastomas have more scalloped margins</p> Signup and view all the answers

    What feature distinguishes the appearance of basal cell naevus syndrome lesions from similar cysts?

    <p>Bilateral symmetry</p> Signup and view all the answers

    In the context of odontogenic keratocysts, what is true about their expansiveness?

    <p>They are minimally expansile lesions</p> Signup and view all the answers

    Which feature is characteristic of a buccal bifurcation cyst as opposed to other cyst types?

    <p>Present during post-eruptive dentition</p> Signup and view all the answers

    Study Notes

    Dental Caries

    • Early enamel lesions appear as well-defined triangular radiolucencies, with the base at the enamel surface.
    • As the lesion grows, it loses its triangular shape and becomes more rounded.
    • When the lesion reaches the dentinoenamel junction (DEJ), it spreads out, forming a less well-defined triangular lucency in the dentin.
    • The dentin lesion progresses faster than the enamel lesion.
    • Large lesions cause significant dentin involvement, potentially undermining the overlying enamel, leading to fractures.
    • Very large lesions can result in the complete or near-complete loss of the tooth crown.

    Cervical Burnout

    • Radiographic lucencies can appear in the interproximal regions, extending from the cementoenamel junction to the interdental alveolar crest.
    • These lucencies are often artefactual, appearing on intraoral and panoramic radiographs.
    • Lucent or absent restorations are typically more clearly defined and exhibit sharp surgically-prepared angles.

    Interproximal Caries

    • These lesions originate at the mesial and distal surfaces of the crowns, usually between the contact point and the gingival margin.
    • Initial stages display a well-defined triangular lucency within the enamel.

    Pit and Fissure Caries

    • Dentin lucency is often seen first in 2D radiographs, appearing under the enamel.
    • Enamel lesions are usually not visible unless they are large.
    • Identifying buccal or lingual location of these lesions can be challenging.

    Root Caries

    • These lesions appear as lucent regions at the cementoenamel junction.
    • They typically appear coronal to the alveolar crest, and sometimes extend beyond it.

    Active vs Inactive Lesions

    • Active lesions are characterized by radiographic features that suggest ongoing damage.
    • Inactive lesions indicate that the decay process has likely slowed or stopped.

    Radiolucent Restorations

    • Incipient caries are less than halfway through the enamel.
    • Enamel caries that extend halfway through the enamel.
    • Caries at the DEJ (moderate).
    • Dentin caries extending to the pulp (severe).

    Periapical Inflammatory Lesions

    • These conditions include apical periodontitis, periapical rarefying osteitis, periapical condensing/sclerosing osteitis, and periapical granuloma.

    • They're most commonly at the apical aspects of tooth roots.

    • Clinical presentations range from asymptomatic to severe infections.

    • Early or lower-grade lesions show widened periodontal ligament spaces, while more advanced lesions demonstrate a lucency centered at the root apex, with effacement of the lamina dura.

    • Extensive or chronic lesions may reveal periapical sclerotic areas.

    • Lesions can resemble those seen in acute inflammatory reactions.

    Periapical Osseous Dysplasia

    • Radiographic characteristic of these conditions is the appearance of radiolucent areas in the jaw/maxillary.

    Radicular Cyst

    • These lesions appear as round or ovoid radiolucencies; they are typically greater than 1.5 cm and involve non-vital teeth..

    Dentigerous Cyst (Follicular Cyst)

    • A common jaw cyst, often associated with impacted or unerupted teeth, primarily third molars.
    • Lesions are typically corticated (well-defined edges).
    • They present as a pericoronal radiolucency or the appearance of an enlarged follicular space of a tooth crown, most often centered at one region or limited to one side of a tooth crown.

    Buccal Bifurcation Cyst

    • It's a cyst centered at the buccal furcation of a mandibular molar.
    • A well-defined, expansile, corticated lucent lesion.
    • The affected tooth root is typically displaced lingually.
    • Root resorption isn't usually associated with this condition.

    Keratocystic Odontogenic Tumor (KCOT)

    • Usually located in the posterior mandible.
    • Mostly asymptomatic unless large or infected.
    • Appear as well-defined, corticated, lucent or slightly radiopaque lesions within the mandible.

    Basal Cell Nevus Syndrome

    • An inherited syndrome featuring significant oral manifestations, including multiple KCOTs.
    • Radiologically, the syndrome is characterized by multiple, well-defined KCOTs, often bilateral in the jaws.

    Lateral Periodontal Cyst

    • They arise from odontogenic epithelium on the lateral surface of a tooth root, unrelated to the root's pulp status.
    • Typically appear as well-defined lucent lesions centered on the lateral surface of the tooth roots.

    Glandular Odontogenic Cyst

    • Appear as unilocular or multilocular, well-defined radiolucencies, often with corticated borders.
    • Frequently associated with the mandible.

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    Description

    Test your knowledge on the characteristics and radiographic features of periapical inflammatory lesions. This quiz covers various aspects such as margins, sclerosis, and clinical appearances of carious lesions. Understand the differences between acute and chronic periapical conditions through focused questions.

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