Abstract
Objective: The objective of the study was to evaluate the possible influence of Gonial measurements on sex determination. Materials and methods: The present study consists of 188 subjects (94 males and 94 females) between 15 to 65 years of age. Suitable radiographs with visible gonial region were included in the study. GA and GI were measured according to the methods proposed by Bras & Mattila et al. [1,2] respectively. The measurements obtained were tabulated in excel sheet and subjected to statistical analysis. Results: The mean GI was significantly higher in males (1.56 ± 0.31 mm) when compared to females (1.42 ± 0.34 mm). Hence the present sample was subjected to discriminant analysis with gender as a grouping variable, GI and GA as independent variables. Based on Wilk’s lambda values Gonial index (GI) was observed to provide better sex determination when compared to Gonial angle (GA). Hence 2 different discriminant equations were obtained, one using GI alone and another one using both GI and GA. Conclusion: The present study confirmed significant sexual dimorphism in the values of Gonial index. Males were observed to have higher GI when compared to females.
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