Dental anomalies Flashcards
Describe the dental anomaly of supernumerary teeth/ hyperdontia.
Define:
Mesiodens
Distodens
Paramolars
- An increased number of teeth
- May appear superimposed on other teeth in radiographs
Mesiodens:
• describes midline maxilliary position
Paramolar
• describes the molar region
Distodens
• describes those distal to the third molar
Describe the dental anomaly of odontomes.
Define:
Complex odontome
Compound odontome
- Also classified as radiopaque lesions or tumours
- Appear radiopaque with varying degrees of calcified material
Complex odontome
• a diffuse disorganised mass of dental tissue
Compound odontome
• a malformation that looks like a normal tooth
Describe the dental anomaly of missing teeth by defining:
Hypodontia
Oligodontia
Anodontia
Agenesis
Hypodontia
• Describes any number of missing teeth
• 8’s are most common
Oligodontia
• Refers to 6 or more missing teeth
Anodontia
• Refers to complete absence of teeth
Agenesis
• Absence or incomplete development of a body part
Describe the dental anomaly of macrodontia
- Tooth that is larger than normal
- Commonly caused by isolated disturbance of development (single tooth)
- Can be caused by hormonal imbalances
Describe the dental anomaly of double tooth by defining:
• Germination
• Fusion
Gemination
• One tooth bud split into two
Fusion
• Two tooth buds joined together
Describe the dental anomaly of taurodontism
• Molar teeth with a pulp chamber that is vertically enlarged at the expense of the roots
Describe the dental anomaly of enamel pearls
- Small globule of enamel occurring on the roots of molar teeth in the trifurcation/ bifurcation
- Contains a core of dentine and infrequently a pulp extending from the pulpal tissue of the tooth
- Can be a local risk factor for perio
Describe the dental anomaly of concrescence
- Cementum of two teeth join together.
* Most commonly affects maxillary second & third molars
Describe the dental anomaly of dilaceration
- A sharp bend or curve in the crown or root
* Usually the result of trauma during tooth development
Describe the dental anomaly of Dens Invaginatus and its radiographic appearance
- When the enamel folds into the dentin
* There is a radiopaque infolding of enamel into the tooth’s pulp chamber
Describe the dental anomaly of Dens Envaginatus
- Produced by an outfolding of the outer surface of the tooth during development
- Results in a tubercle on the surface of the affected tooth
Describe the dental anomaly of enamel hypoplasia
- The enamel may appear thin and the crown may have an unusual shape
- Pitted hypoplasia appears as areas with differing density
Describe the dental anomaly of enamel hypoplasia
- The enamel may appear thin and the crown may have an unusual shape
- Pitted hypoplasia appears as areas with differing density
Describe the dental anomaly of dentinogenesis Imperfecta
- Disorder that results in abnormal dentine formation
- Clinically, teeth are discoloured from bluish to amber
- Radiographically may present with obliteration of the pulp chamber (type I and II) or an enlarged pulp chamber (type III) and often shows abnormal crown and root morphology
Describe the dental anomaly of amelogenesis Imperfecta
- Abnormal enamel formation; enamel may be missing
- Radiographically, the enamel contrast varies from normal to similar or less than the radiographic appearance of dentine
