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NUMBER OF TEETH

NUMBER OF TEETH. Anodontia Supernumerary Teeth Decidous teeth. ANODONTIA.

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NUMBER OF TEETH

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  1. NUMBER OF TEETH • Anodontia • Supernumerary Teeth • Decidous teeth

  2. ANODONTIA • In dentistry, anodontia, also called anodontia vera, is a rare genetic disorder characterized by the congenital absence of all primary or permanentteeth. It is associated with the group of skin and nerve syndromes called the ectodermal dysplasias. Anodontia is usually part of a syndrome and seldom occurs as an isolated entity. • Anodontia is the congenital absence of teeth and can occur in some or all teeth (partial anodontia or hypodontia), involve two dentitions or only teeth of the permanent dentition (Dorland's 1998). Many denominations are attributed to this anomaly: partial anodontia, hypodontia, oligodontia, the congenital absence, anodontia, bilateral aplasia. Anodontia being the term used in controlled vocabulary Medical Subject Headings (MeSH) from MEDLINE which was developed by the United States National Library of Medicine. The Anodontia of at least one permanent tooth is the most common dental anomaly and may contribute to masticator dysfunction, speech impairment, aesthetic problems, and malocclusion (Shapiro and Farrington 1983). Absence of lateral incisors represents a major stereotype. Individuals with this condition are perceived as socially most aggressive compared with people without anodontia (Shaw 1981).[1] • Partial anodontia, known as hypodontia or oligodontia, is the congenital absence of one or more teeth. Congenital absence of all wisdom teeth, or third molars, is relatively common.

  3. HYPERDONTIA • Hyperdontia is the condition of having supernumerary teeth, or teeth which appear in addition to the regular number of Types • Supernumerary teeth can be classified by shape and by position. The shapes include: • Supplemental (where the tooth has a normal shape for the teeth in that series); • Tuberculate (also called "barrel shaped"); • Conical (also called "peg shaped"); • Compound odontoma (multiple small tooth-like forms); • Complex odontoma (a disorganized mass of dental tissue)[1] • When classified by position, a supernumerary tooth may be referred to as a mesiodens, a paramolar, or a distomolar. • The most common supernumerary tooth is a mesiodens, which is a mal-formed, peg-like tooth that occurs between the maxillary central incisors. • Fourth and fifth molars that form behind the third molars are another kind of supernumerary teeth • teeth

  4. PRE-DECIDOUS TEETH •  the teeth which appeared some time after birth (neonatal). The structural aspects, maturity, anatomical and functional conditions of these uncommon teeth were not observed (Spouge and Feasby, 1966). They were considered to belong to a pre-deciduous dentition, since 90% of natal or neonatal teeth are the same elements as future deciduous dentition (Ronk, 1982). Thus, Spouge and Feasby (1966) differentiated natal and neonatal teeth based on the maturity of the structures, suggesting the term "premature teeth". The teeth or group of teeth which are present at birth are denoted as natal dentition, while neonatal teeth are those which erupt during the first month of life (Massler and Savara, 1950). 

  5. SIZE OF TEETH • Microdontia • macrodontia

  6. Microdontia • Microdontia is a condition in which teeth appear smaller than normal. In the generalized form, all teeth are involved. In the localized form, only a few teeth are involved. The most common teeth affected are the upper lateral incisors and thirdmolars.Theaffected teeth may be of normal or abnormal morphology.

  7. MACRODONTIA • Macrodontia is a condition in which any tooth or teeth appear larger than normal for that particular type of tooth. True that involves the entire dentition is rare. It is more common that there is an enlargement of a single tooth due to a disturbance of morphodifferentiation. It should not be confused with either taurodontism (bull teeth), fusion (double tooth) or the jaws being relatively small, giving the appearance of macrodontia. It is commonly associated with gigantism.

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