Comparison among incisal landmark analysis of black brazilian youngsters with normal occlusion

Paulo Roberto Aranha NOUER, Darcy Flávio NOUER, Ivana Uglik GARBUI, Zeferino Yutaka MIYAMURA, Orivaldo TAVANO, Ynara Bosco de Oliveira LIMA-ARSATI

Defining the position for the mandibular incisor provides data for a correct treatment planning and treatment itself, in order to achieving a better stability after retention. However, it has been observed that cephalometric analyses that are usually employed in orthodontics for diagnosis are based on studies on caucasians, whose craniofacial characteristics differ from those of other races. Thus, the present study aims to investigate the behavior of mandibular incisor related to incisal landmarks that are commended by Andrade (1-Jr), Interlandi (1- I line), Vigorito (1- V line) and Ricketts (1- APo line), in african-american children with normal occlusion, and to verify the occurrence of sexual dimorphism. Thirty-six lateral skull films from african-american subjects were selected from the FOP/UNICAMP Department of Orthodontics Post-Graduation Program Scientific Recordings; the patients ages varied from 10 to 14 years, and they presented clinically excellent occlusion, and have not undergone orthodontic treatment. The cefalogram required for the suggested analyses were drawed. The presented values for the mandibular incisor position differ among themselves as by two different statistical analysis; there is also significant difference among the referred methods. No sexual dimorphism was found in this study. It was shown that the position of mandibular incisor of african-american children presented greater labioversion than the same parameters as commended by the proposed authors, and that Andrade analysis seemed more adequate to this ethnic group.

Keywords: Cephalometry. Black people. African continental ancestry group. Orthodontics.

Wednesday, May 01, 2024 20:01