Tooth size in individuals with congenitally missing teeth: a study of Japanese males

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概要

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• There is evidence of a relationship between tooth size and tooth agenesis in human populations, with a tendency for reduced tooth size in individuals with missing teeth. The aim of this study was to analyze the size of remaining teeth (mesiodistal crown diameters) and their variability in individuals with varying degrees of severity of congenitally missing teeth. Tooth crown diameters were recorded from 100 dental plaster casts of Japanese males. Subjects were divided into three agenesis groups: group A had one missing tooth per individual, group B had two missing teeth per individual, and group C had three or more missing teeth per individual. For comparison, tooth size data were used from a previously studied sample of Japanese males who did not have any congenitally missing teeth. Group A displayed the largest mesiodistal crown size dimensions for all maxillary and mandibular teeth, followed by group B, and then group C. In comparison with the reference data, when only one or two teeth were missing, the remaining teeth tended to be larger, but when there were three or more missing teeth, the remaining teeth tended to be significantly smaller throughout the dentition. In terms of tooth size variability, dental dimensions in the agenesis groups were generally more variable compared with those in the reference sample. This tendency was most pronounced in the group with the greatest number of missing teeth. Although there was a tendency for the size of the remaining teeth to be more reduced as the number of missing teeth increased, tooth size in individuals with only one or two teeth missing was generally larger than in a control group with all 32 permanent teeth, suggesting that the relationship between tooth size and dental agenesis may be more complicated than previously thought, perhaps due to local compensatory interactions affecting the size of teeth.

• 日本人類学会の論文

著者

• 近藤 信太郎

  昭和大学歯学部第一口腔解剖学教室

• 花村 肇

  愛知学院大歯解剖2

• YAMADA Hiroyuki

  Department of Materials Engineering, Graduate school of Engineering, The University of Tokyo

• 近藤 信太郎

  愛知学院大学歯学部解剖学講座

• 近藤 信太郎

  昭和大学 歯 小児歯

• 近藤 信太郎

  愛知学院大学歯学部解剖学第二講座

• Kondo S

  Showa Univ. School Of Dentistry Tokyo Jpn

• Kondo Shintaro

  昭和大学 歯 口腔解剖

• Kondo Shintaro

  バングラデシュ

• Kondo Shintaro

  昭和大学 歯 口腔解剖学

• 花村 肇

  愛知学院大学 歯

• 花村 肇

  愛知学院大学歯学部解剖学第二講座

• 花村 肇

  愛知学院大学歯学部解剖学講座

• 花村 肇

  愛知学院大学 歯学部解剖学講座

• 近藤 信太郎

  昭和大学歯学部第1口腔解剖学講座

• Yamada Hiroyuki

  Department Of Cardiovascular Medicine Kyoto Prefectural University Of Medicine

• 山田 博之

  愛知学院大 歯 解剖学第二

• KONDO Shintaro

  Department of Medical Physiology, Meiji Pharmaceutical University

• Kondo S

  The First Department Of Oral Anatomy Showa University School Of Dentistry

• Kondo Shintaro

  The First Department Of Oral Anatomy Showa University School Of Dentistry

• Kondo Shintaro

  Department Of Anatomy School Of Dentistry Aichi-gakuin University

• Kondo Shintaro

  Department Of Oral Anatomy Showa University School Of Dentistry

• Kondo Shintaro

  Department Of Oral Anatomy And Developmental Biology Showa University School Of Dentistry

• Kondo Shintaro

  Showa University

• Hanamura Hajime

  Department Of Anatomy School Of Dentistry Aichi-gakuin University

• Hanamura Hajime

  The Second Department Of Anatomy School Of Dentistry Aichi-gakuin University

• TOWNSEND GRANT

  School of Dentistry, The University of Adelaide, Adelaide

• Kondo Shintaro

  Dept. Oral Anatomy Showa Univ. School Of Dentistry

• Yamada Hiroyuki

  Department Of Anatomy School Of Dentistry Aichi-gakuin University

• Townsend Grant

  School Of Dentistry The University Of Adelaide

• YAMADA HIROYUKI

  Department of Anatomy, School of Dentistry, Aichi-Gakuin University, Nagoya

• KONDO SHINTARO

  Department of Anatomy, School of Dentistry, Aichi-Gakuin University, Nagoya

• HANAMURA HAJIME

  Department of Anatomy, School of Dentistry, Aichi-Gakuin University, Nagoya

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