Presentation on theme: "DENTAL ANOMALIES Anomaly- defined as something that is noticeably different or deviates from the norm."— Presentation transcript:
1DENTAL ANOMALIESAnomaly- defined as something that is noticeably different or deviates from the norm.
2Dental anomalies Are deviations of dental tissue origin— Dental tissues are enamel, dentin or cementum
3These anomalies can result from: Intrinsic factorsExtrinsic factors
4Intrinsic factorsResult of heredity, metabolic dysfunction, or mutations
5Extrinsic factorsResult of physical or chemical trauma, biologic agents, nutritional deficiencies, stress, habits or environmental conditions.
6Hereditary Congenital—condition that occurs at or before birth Familial tendency- if a condition exists due to evidence of an inherited tendencyDevelopmental anomaly- a condition that results during the formation and development of a dental structure.
7Classification of Dental Anomalies Macrodontia-teeth are too largeMicrodontia- teeth are too smallHyperdontia- extra teethAnodontia- too few teethTotal anodontia- no teeth are present at allPartial anodontia- less than the normal number of teeth are present.
8Most common missing permanent teeth are: Third molarsMore often the maxillary thirds more than the mandibular thirds.
9Second most common missing permanent teeth are: Maxillary lateral incisors
10Third most common missing tooth is: Mandibular second premolar
11Least likely permanent tooth to be missing is: The canines
19Maxillary supernumerary teeth outnumber mandibular. Shapes of supernumerary teeth:Regular tooth shape- supplementalCone-shaped- conicalVery small in size- tubercle
20HyperdontiaDistomolars- are called fourth molars and are located distal to the maxillary third molars.—these occur more frequently in the Maxillary then Mandibular arch.Paramolar- a supernumerary tooth situated buccally or lingually to a molar.
21ANOMALIES IN SHAPEOdontoma-tumorous anomaly of calcified dental tissues
22Dens in DenteThe outer surface of the tooth crown invaginates or turns itself inward before mineralization—Means, “tooth within a tooth”
51DENTIN IS GRAY, BROWN OR YELLOW—TOOTH HAS AN UNUSUAL TRANSLUCENT HUE DENTIN IS GRAY, BROWN OR YELLOW—TOOTH HAS AN UNUSUAL TRANSLUCENT HUE.-PULP CHAMBERS AND ROOT CANALS ARE COMPLETELY FILLED IN WITH DENTIN.
55Tetracycline staining A condition that occurs when an expectant mother or a young child with tooth crowns are still developing takes tetracycline. The teeth discolor and the color ranges from yellow to brown or grayish blue.