Enamelless Tooth Rudiments Found in Cadavers for Student Laboratory Practice

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  • Komuro Hiroshi
    Depertment of Oral Anatomy, Faculty of Dentistry, Tokyo Medical and Dental University

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  • 解剖実習体から剖出された無エナメル質こん跡歯
  • カイボウ ジッシュウタイ カラ ボウダサレタ ム エナメルシツ コンセキシ

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Abstract

In three out of 288 cadavers for student laboratory practice, four elliptical bodies of rice size were found: one from the mandibular midline of a 61-year-old man, two from the right maxillary premolar region of an 80-year-old man and one from the left maxillary premolar region of a 65-year-old man. Histological examination revealed that these structures are composed of dentin and cementum, but deficient in enamel and surrounded by osteoid tissue. Comparison with the histological finding of the impacted supernumerary teeth and the remnants of the roots yielded the conclusion that these four bodies are regarded as enamelless tooth rudiments, the most reduced type of supernumerary teeth.

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