Questions and Answers
What is the clinical feature of small tooth-generalized microdontia?
Gemination results in the formation of two completely separated crowns and separate root canals.
False
What type of fusion occurs in the roots of adjacent teeth?
Concrescence
Fusion of teeth often leads to difficulties in __________ treatment.
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Match the lesion/disorder with its clinical features:
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In which region is fusion more common?
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Single tooth macrodontia is characterized by teeth that are larger than normal.
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What is a common problem associated with gemination?
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Study Notes
Microdontia
- Localized-Single Tooth Microdontia: Permanent condition primarily in females; affects all teeth resulting in smaller-than-normal size, especially in larger jaws; no structural alterations; may resemble a conical supernumerary tooth.
- Small Tooth-Generalized Microdontia: Also permanent and female-predominant; uniform reduction in tooth size across all teeth without structural changes.
Macrodontia
- Single Tooth or Localized Macrodontia: Permanent condition, not sex-specific; rare occurrence typically associated with facial hemihypertrophy; characterized by larger-than-normal teeth.
- Big Tooth-Generalized Macrodontia: Permanent condition affecting all teeth, presenting as uniformly larger sizes compared to normal teeth.
Gemination
- Double Teeth Presentation: Occurs in both deciduous and permanent dentition; results from splitting of a single tooth germ, yielding either completely or incompletely separated crowns with a single root and canal, potentially complicating aesthetic outcomes and endodontic procedures.
Twinning
- Results from the splitting of a normal tooth germ and a supernumerary tooth, leading to equivalent structures; may contribute to dental crowding, affecting both deciduous and permanent dentition.
Fusion
- More common in deciduous teeth, typically seen in the maxillary anterior region; involves the union of two tooth germs, which may result in completely or partially fused teeth with confluent dentin and potentially separate or fused root canals.
- Posterior maxillary region fusion varies; can occur between a normal tooth and a supernumerary tooth, making extraction difficult.
- Involvement of permanent maxillary incisors or mandibular anteriors shows fusion via cementum, leading to bone resorption and challenges in endodontic treatment.
Concrescence
- A specific type of fusion, occurs at the roots of adjacent teeth, leading to united roots.
Dilaceration
- Characterized by an abnormal curve or bend anywhere along the tooth's length, which can influence crown or root morphology; a permanent condition not associated with sex predilection.
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Description
Dive into the clinical and microscopic features of various oral lesions. This quiz covers key aspects such as differential diagnosis and age/sex factors associated with lesions like Microdontia. Enhance your understanding of oral health with this comprehensive overview.
