Cephalometric study of anterior and posterior facial height in black young Brazilians with “normal occlusion”

Lívia Maria Andrade de Freitas UCHIYAMA, Arnaldo PINZAN, Célia Regina Maio PINZAN-VERCELINO, Guilherme JANSON, Marcos Roberto de FREITAS

Aim: in order to present specific cephalometric norms to black young Brazilians, this study aimed to achieve the mean normal values for some vertical skeletal cephalometric variables (anterior and posterior facial heights) and to verify the presence of dimorphism between genders. Methods: the sample comprised 56 lateral cephalograms, 28 male subjects, at a mean age of 13.93 years (range 12.08 to 15.75 years), and 28 females, at a mean age of 13.79 years (range 12.58 to 15.67 years), obtained from an untreated sample of black young Brazilians, presenting “normal occlusion”, from the files of Orthodontic Department at Bauru Dental School – University of São Paulo. The cephalometric measurements were based on analyses of Wylie, Johnson; Siriwat, Jarabak; Gebeck, Merrifield, Horn. The comparison between genders was performed by independent t tests. Results: based on this study’results, it was verified that black young Brazilians present specific norm values to vertical skeletal cephalometric variables. It was observed the presence of dimorphism in the variables total and upper anterior facial height and total and upper posterior facial height (TAFH; UAFH; TPFH; UPFH), and in the ratios of upper and lower posterior with the total posterior facial height (UPFH/TPFH; LPFH/TPFH). It was demonstrated a larger vertical facial development in male subjects. A greater UPFH/TPFH ratio was found in males subjects and the females presented highest values of LPFH. Conclusion: the cephalometric norms guide the professionals to respect the morphology and the facial pattern considering individual factors, as racial miscegenation and geographic origin.

Keywords: Orthodontic diagnosis. Ethnic groups. Vertical dimension. Cephalometrics.

Saturday, December 28, 2024 22:32