Applicability of bolton’s tooth size ratios in mediterranean, japanese and japanese-brazilian populations

Keywords: Dental occlusion. Ethnic groups. Orthodontics.

Abstract

Objective: The aim of this study was to determine if Bolton’s tooth size ratios can be applied to Mediterranean, Japanese and Japanese-Brazilian populations. Materials and methods: The sample comprised 90 pairs of dental casts of untreated individuals with normal occlusion, divided into 3 groups according to ethnical characteristics: White (30 Mediterranean descendant subjects, with a mean age of 13.64 years), Japanese (30 subjects with Japanese ancestry, with a mean age of 15.63 years)  and Japanese-Brazilian (30 Japanese-Brazilian subjects, with a mean age of 13.96 years). A digital caliper was used to measure the maxillary and mandibular mesiodistal widths from first molar to first molar on each dental cast. The anterior and overall tooth size ratios were calculated. T test was applied for comparisons between Bolton standards and the ethnical groups for anterior and overall ratios. Results: Only the Japanese-Brazilian group showed significantly greater ratios than Bolton standards. Conclusion: It was concluded that Bolton’s ratios are not applicable to the Japanese-Brazilian population. Therefore, it is suggested that Bolton’s ratios may not be suitable for different populations.

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Author Biographies

Karine Laskos Sakoda, Universidade de São Paulo
Doutoranda em Ciências Odontológicas Aplicadas, área de concentração Ortodontia pela Universidade de São Paulo (FOB/USP). Possui graduação em ODONTOLOGIA pela Universidade Estadual de Ponta Grossa (2008), Especialização em Ortodontia pelo Centro de Ensino Superior dos Campos Gerais (2012) e Mestrado em Ciências da Reabilitação pelo Hospital de Reabilitação de Anomalias Craniofaciais (2014). 
Arnaldo Pinzan, Universidade de São Paulo
Possui graduação em Odontologia pela Universidade de São Paulo (1974), mestrado em Odontologia Ortodontia FOB pela Universidade de São Paulo (1978) e doutorado em Odontologia (Prótese Dentária) pela Universidade de São Paulo (1982). Atualmente é professor associado III da Universidade de São Paulo. Tem experiência na área de Odontologia, com ênfase em Ortodontia, atuando principalmente nos seguintes temas: cefalometria, tratamento ortodôntico, grupos raciais, ortodontia e má oclusão
Guilherme Janson, Universidade de São Paulo
Possui graduação em Odontologia pela Faculdade de Odontologia de Bauru da Universidade de São Paulo (1980), mestrado em Ortodontia pela Faculdade de Odontologia de Bauru da Universidade de São Paulo (1983) e doutorado em Ortodontia pela Faculdade de Odontologia de Bauru da Universidade de São Paulo (1985). Atualmente é professor titular da Faculdade de Odontologia de Bauru da Universidade de São Paulo. Tem experiência na área de Odontologia, com ênfase em Ortodontia, atuando principalmente nos seguintes temas: tratamento ortodôntico, cefalometria, ortodontia, estabilidade e alterações dentoesqueléticas.
Sérgio Elias Neves Cury, Centro de Pós-Graduação em Odontologia Uningá
Doutorando em Ortodontia pela FOB-USP, Mestre em Materiais (área de pesquisa em Ortodontia) pela UniFOA (2013), Especialista em Ortodontia pela Inco-25 / Unig (2010), Graduado em Odontologia pelo Centro Universitário de Volta Redonda (2007). Professor no Curso de Especialização em Ortodontia na CPO Uningá - Bauru/SP. Sócio na Empresa Radiocentro

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Published
2017-09-20
How to Cite
Sakoda, K. L., Pinzan, A., Janson, G., & Cury, S. E. N. (2017). Applicability of bolton’s tooth size ratios in mediterranean, japanese and japanese-brazilian populations. Brazilian Journal of Oral Sciences, 15(4), 269-272. https://doi.org/10.20396/bjos.v15i4.8650038
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Article