International Journal of Clinical Dental Science, Vol 9, No 1 (2018)

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Angle’s classification among Brazilian racial biotypes: a university based observational study

Liana Fattori, Andre Tortamano, João Batista de Paiva, José Rino Neto


Background: The purpose of this study is to determine demographic profile and the pattern of malocclusion from the initial clinical records of patients who sought the dental clinics for orthodontic treatment and to determine difference in Angle’s classification among racial biotypes.

Materials and Methods: Between the years 2011 and 2014, 1576 clinical records were selected and reviewed by one examiner to identify epidemiological characteristics. Angle’s classification, age, dentition, and others were scored, and after tabulation, data were grouped to find percentiles.

Results: Class I was found at 57.9%; Class II, 31.4%, and Class III, 10.8%; there was no significant difference in gender distribution (49.6% of men and 50.4% of women); the orthodontic treatment plan indicated was comprehensive (77.4%) and the sample was composed, mainly, by white and mulatto biotypes (40.8% and 41.1%, respectively) and by youth aged 5–10 y.o. (32.1%) and aged 11–15 y.o. (29.4%). Conclusion: There was a high incidence of Class I and indication for comprehensive treatment. There were differences in the incidence of malocclusion for the Afro-Brazilian ethnic group.

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ISSN   2229 – 7790     (Print) ;  ISSN  2229 – 7804   (Online)


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The journal titles which were acquired on September 9th 2014 were International Journal of Contemporary Dentistry( and International Journal of Clinical Dental Science(