Dental Anomalies Flashcards
Teeth in excess of the normal
complement
Hyperodontia
Hyperdontia in maxillary incisors
Mesodens
Hyperdontia of mand or max 4th molars
Distodens/paramolars
Problems with
• Affect eruption of normal complement of
teeth
• Cystic degeneration of follicular
epithelium
Supernumeraries
What is the most common supernumerary tooth?
Mesodens
Multiple supernumerary teeth are most common in what area?
PM area
What are the 2 syndromes with multiple teeth?
Cleidocranial Dysplasia
Gardner
- Frontal & parietal bossing
* Clavicular aplasia
Cleidocranial Dysplasia
• Autosomal dominant
• Multiple osteomas including the jaws
• Colorectal polyps with malignant potential
• Multiple supernumerary teeth
• Lesions of skin (cutaneous epidermoid cysts
and fibromas)
Gardner Syndrome
less than the normal tooth complement of an existing dentition; permanent or deciduous less than one or more of an existing dentition; permanent or deciduous
Hypodontia
congenital absence of all teeth
Anodontia
– agenesis of all teeth
• Anodontia
– congenital lack of > 6
permanent teeth, excluding third molars
•
• Oligodontia
– less than one or more of
an existing dentition; permanent or
deciduous
Hypodontia
What are the 5 syndromes mentioned that are common with hypodontia?
• ectodermal dysplasia • oligodontia-colorectal cancer syndrome • ectodermal dysplasia with oligodontia- colorectal cancer syndrome • otodental dysplasia – associated with deafness • Rieger Syndrome – associated with deafness
• Hypodontia not associated with other
multiple system congenital syndrome
• Seen with third molars and maxillary
lateral incisors
Reduction Phenomenon
Is peg lateral incisors (AMLI) more autosomal or sex linked recessive or dominant?
AD
If a tooth has gemination, twinning, fusion, or concresence occur, what do we call this clinically?
Macrodontia
• Abnormal angulation or bend in the root (and occasionally the crown) of a tooth • Some related to trauma during odontogenesis • idiopathic
Dilaceration
• Extra roots above the complement of roots classically described for the dentition
Supernumerary Roots
– physiologic wear of teeth
Attrition
– mechanical wear of teeth
Abrasion
– chemical wear of teeth
Erosion
• Idiopathic developmental disorder of odonogenesis causing elongation of the pulp chamber (aka apical displacement of the pulpal floor) and shorter root appendages • failure of Hertwig's epithelial sheath diaphragm to invaginate at the proper horizontal level, resulting in a tooth with short root, enlarged body, an enlarged pulp and normal dentin
Taurodontism
• Primarily seen in lateral incisors but also centrals, premoalrs, centrals, canines.....
Dens in Dente
Type ___ dens in dente:
Coronal
Type 1
Type _____ dens in dente:
Extends apical to CEJ
Type 2
Type _____ dens in dente:
Extends through root perforating to apex
Type 3
