Questions and Answers
Which structural component comprises the majority of the tooth?
The cancellous bone in the posterior mandible _______________.
Which phrase best describes the periodontal ligament space?
Which primary teeth erupt between nine and thirteen months of age?
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The permanent maxillary canine teeth erupt _______________.
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Which phrase accurately describes tooth eruption?
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Which feature is characteristic of tooth ankylosis?
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Which term best describes the position angulation of the impacted tooth recorded on this periapical radiograph?
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What is the definition of the term anodontia?
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Which is the most common type of supernumerary tooth?
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Which phrase is an apt description of microdontia?
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Gemination is an anomaly in which _______________.
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Each phrase is consistent with dens evaginatus EXCEPT one. Which is this EXCEPTION?
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According to Oehlers Classification, the most severe form of dens invaginatus involves the _______________.
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Which phrase accurately describes taurodontism?
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Hypercementosis is characterized by _______________.
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Of the teeth listed, which is most frequently affected by root dilaceration?
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What causes abfraction of the tooth structure?
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Each description of external resorption is correct EXCEPT one. Which is this EXCEPTION?
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Which feature is characteristic of pulp stones?
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Study Notes
Tooth Structure Anomalies
- Dentin is the primary structural component making up the majority of a tooth.
- The posterior mandible's cancellous bone exhibits large sparse trabeculae and marrow spaces, affecting its radiographic appearance.
Periodontal Ligament and Tooth Eruption
- The periodontal ligament space functions as a cushion for the tooth through flexible collagen fibers.
- Maxillary lateral incisors typically erupt between nine and thirteen months of age, differing from mandibular canine teeth.
- Permanent maxillary canine teeth emerge after their mandibular counterparts.
Tooth Eruption Characteristics
- Tooth eruption process continues post-emergence to counteract wear, showing the ongoing nature of dental development.
- Ankylosis is identified by the occlusal plane submerging the tooth crown.
Tooth Development Anomalies
- Anodontia refers to a lack of tooth development, rather than merely missing teeth.
- Mesiodens is the most frequently seen supernumerary tooth type, indicating common variations in dental anatomy.
Microdontia and Gemination
- Microdontia often involves the maxillary lateral incisor and might be linked to other dental anomalies.
- Gemination occurs when a single tooth attempts to divide, resulting in a larger than normal tooth structure.
Dens Evaginatus and Dens Invaginatus
- Dens evaginatus does not typically produce an involution of tooth structure, with coronal projection commonly noted.
- Dens invaginatus's most severe form affects the tooth root, highlighting diverse presentations of this anomaly.
Taurodontism and Hypercementosis
- Taurodontism is characterized by an elongated pulp chamber, influencing the tooth's internal structure.
- Hypercementosis results in abnormal root anatomy often manifesting as lobular shapes.
Root Dilaceration and Abfraction
- Maxillary second premolars are most commonly affected by root dilaceration, which affects the angle of the tooth root.
- Heavy occlusal forces are the primary cause of abfraction, whereas other agents like friction and chemical exposure do not contribute significantly.
External Resorption and Pulp Stones
- External resorption can lead to discoloration and typically affects multiple teeth as a response to mechanical forces.
- Pulp stones present as focal calcifications within the pulp chamber, correlated with increased age and trauma history of the affected teeth.
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Description
Test your knowledge on the various structural components of teeth with this quiz. Covering key elements such as enamel, dentin, cementum, and more, this quiz challenges your understanding of dental anatomy. Perfect for dental students and professionals alike.
