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Hyperdontia is the condition of having supernumerary teeth, or teeth that appear in addition to the regular number of teeth. They can appear in any area of the dental arch and can affect any dental organ. ==Types== Supernumerary teeth can be classified by shape and by position. The shapes include the following: * 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)〔Oxford Handbook of Clinical Dentistry〕 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 malformed, 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.〔Kokten G, Balcioglu H, Buyukertan M. (Supernumerary Fourth and Fifth Molars: A Report of Two Cases. ) Journal of Contemporary Dental Practice, 2003 November; (4)4:067-076. Page accessed December 13, 2010.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hyperdontia」の詳細全文を読む スポンサード リンク
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