Correlating Dental Dimensions and Malocclusion Phenotypes in Brazilian Population: A Retrospective Study
Isabela Ribeiro Madalena *
Department of Biomaterials, University of Uberaba, Uberaba, Minas Gerais, Brazil, Department of Dentistry, University of Joinville Region, Joinville, Santa Catarina, Brazil and School of Dentistry, Presidente Tancredo de Almeida Neves University Center, São João del Rei, Minas Gerais, Brazil.
Marcos Rikio Kuabara
School of Health Sciences, Positivo University, Curitiba, PR, Brazil.
Caio Luiz Bitencourt Reis
Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
César Penazzo Lepri
Department of Biomaterials, University of Uberaba, Uberaba, Minas Gerais, Brazil.
Maria Angélica Hueb de Menezes-Oliveira
Department of Biomaterials, University of Uberaba, Uberaba, Minas Gerais, Brazil.
Mirian Aiko Nakane Matsumoto
Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
Maria Bernadete Sasso Stuani
Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
Flares Baratto-Filho
Department of Dentistry, University of Joinville Region, Joinville, Santa Catarina, Brazil and School of Dentistry, University of Tuiuti of Paraná, Curitiba, Paraná, Brazil.
Erika Calvano Küchler
School of Dentistry, University of Tuiuti of Paraná, Curitiba, Paraná, Brazil and Department of Orthodontics, Medical Faculty, University Hospital Bonn, Bonn, Germany.
João César Zielak
School of Health Sciences, Positivo University, Curitiba, PR, Brazil.
*Author to whom correspondence should be addressed.
Abstract
Objective: To evaluate the association between tooth dimensions and skeletal malocclusions in a Brazilian population.
Material and Methods: This retrospective study evaluated 144 orthodontic records. Tooth dimensions were assessed using dental casts for orthodontic diagnosis and a digital caliper. Sagittal skeletal discrepancies were used using angular measurements: the angle between sella, nasion, and subspinale point A (SNA), the angle between sella, nasion, and supramentale point B (SNB), and the angle between subspinale point A, nasion, and supramentale point B (ANB). The Mann-Whitney test was used to compare the tooth measurements between skeletal malocclusion groups. Spearman correlation was applied to evaluate the correlation between tooth measurements and ANB, SNA, and SNB values. Statistical analysis was performed with a significance level of 5%.
Results: There was a significant difference between the mean tooth proportions of teeth 15, 23, 24, 34, and 44 and the retruded maxilla (P< .05). Teeth 12, 15, and 26 also showed statistical differences in the group in which the maxilla was protruded (P< .05). Teeth 12, 16, and 26 were larger in the group in which the mandible was protruded (P< .05). The SNB angle had a negative correlation with the mean dimensional proportion of tooth 41 (r2=.200; P= .042).
Conclusion: There was a correlation between tooth dimensions and maxillary/mandible phenotypes a Brazilian population.
Keywords: Tooth crown, malocclusion angle class I, malocclusion angle class II, malocclusion angle class III