Digitized study of the correlation between the face and tooth shapes in young adult individuals

Authors

  • Frederico Augusto Peixoto Silva Dentistry School of Technology and Science/Salvador
  • Norma Lúcia Freitas Almeida University of Campinas
  • Daniel Filgueiras Ferreira University of Campinas
  • Marcelo Ferraz Mesquita University of Campinas
  • Wagner Araújo Negreiros University of Campinas

DOI:

https://doi.org/10.20396/bjos.v6i22.8642996

Keywords:

Denture. Complete. Teeth. Artificial. Esthetics. Dental. Criteria. Selection. Forms

Abstract

This study evaluated the clinical validity of the “Williams’s law of harmony” to select artificial teeth in complete dentures, in which there is a similarity between the face and maxillary central incisor (MCIs) shapes. Two photographs were taken (face and MCIs) from 79 students aged 18-25 years, and digitized using a Genius HR-7 scanner. Face and teeth tracings were performed from the photographs using a Easy Digitizer 1.2 software. A non-parametric Chi Square test was applied in the statistical analysis (p<0.05). Results showed a predominance of the square shape (55.70%) in relation to the triangular (27.85%) (p<0.01), and the ovoid (16.45%) (p<0.001) ones. Considering the MCIs shape, the square (67.09%) predominated in relation to the ovoid (18.99%) (p=0), and the triangular (13.92%.) (p=0) ones. The analysis among the shapes showed a lower proportion of identical (10.13%) when compared with no similar (48.10%) (p=0), and similar (41,77%) (p<0.001) ones. Authors concluded that the “Williams’ law of harmony” was not confirmed in the majority of the individuals, and further studies are necessary to actually define which theory satisfies the clinical requirements. The clinical experience and critical sense seem to be more important for a satisfactory esthetic result.

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Author Biographies

Frederico Augusto Peixoto Silva, Dentistry School of Technology and Science/Salvador

Possui graduação em Odontologia pela Universidade Federal da Bahia(1994), mestrado em Clínica Odontológica pela Universidade Estadual de Campinas(2000), doutorado em Clínica Odontológica pela Universidade Estadual de Campinas(2002), ensino-fundamental-primeiro-graupelo Colégio Antonio Vieira(1985) e ensino-medio-segundo-graupelo Colégio Antonio Vieira(1988).

Daniel Filgueiras Ferreira, University of Campinas

Graduado em Odontologia pela Universidade Federal da Bahia (1997), Mestrado em Clínica Odontológica pela Universidade Estadual de Campinas (2005) e Doutorado em Clínica Odontológica pela Universidade Estadual de Campinas (2007). Atualmente é professor da Faculdade de Tecnologia e Ciência - FTC. Atuante nas áreas de prótese dental, oclusão, prótese total e implante.

Marcelo Ferraz Mesquita, University of Campinas

Graduado em Odontologia pela Faculdade de Odontologia de Araraquara da Universidade Estadual Paulista Júlio de Mesquita Filho (1990), mestrado em Materiais Dentários pela Universidade Estadual de Campinas (1993), doutorado em Clínica Odontológica pela Universidade Estadual de Campinas (1995), professor associado (2001). 

Wagner Araújo Negreiros, University of Campinas

Graduação em Odontologia (UFC-2002), Especialização em Prótese Dental (UFC-2004) e Implantodontia (APCD- Piracicaba-2009). Mestre e Doutor em Clínica Odontológica com área de concentração em Prótese Dental (UNICAMP-2008). Professor da Área de Prótese e Oclusão (desde 2011), com atuação nas áreas de reabilitação oral (prótese e implantodontia) e disfunção temporomandibular.

 

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Published

2016-01-21

How to Cite

1.
Silva FAP, Almeida NLF, Ferreira DF, Mesquita MF, Negreiros WA. Digitized study of the correlation between the face and tooth shapes in young adult individuals. Braz. J. Oral Sci. [Internet]. 2016 Jan. 21 [cited 2022 Dec. 7];6(22):1383-6. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8642996

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