American Journal of Orthodontics and Dentofacial Orthopedics
Original articleCondylar and ramal vertical asymmetry in unilateral and bilateral posterior crossbite patients and a normal occlusion sample
Section snippets
Material and methods
Three groups were selected from the archives of the Department of Orthodontics, Faculty of Dentistry, Erciyes University, in Kayseri, Turkey. For this radiographic study, we used panoramic radiographs of 40 subjects with normal occlusion, 46 subjects with unilateral crossbite, and 40 subjects with bilateral posterior crossbite. The age distributions in the 3 groups are shown in Table I.
In the normal occlusion group, panoramic radiographs were taken of the 40 subjects (16 boys, 24 girls; mean
Results
The descriptive mandibular asymmetry indexes for both male and female subjects were calculated separately in the normal occlusion and the crossbite groups to investigate the relationship between the sexes (Table II). The results of the tests showed no statistically significant differences between the mean values of the male and female subjects. Therefore, the data for both sexes were pooled for further statistical analyses.
Means, standard deviations, and statistical results of tests comparing
Discussion
We found many studies that compared mandibular asymmetry in TMD patients10, 11, 12, 13, 14 and various malocclusion patterns.4, 15, 16, 17, 18, 19 Vertical mandibular asymmetries were determined in the unilateral posterior crossbite patients by several authors using SMV radiographs.9, 21 However, Letzer and Kronman25 found no connection between posterior crossbite and asymmetry with posteroanterior radiographic evaluation. Kiki et al4 published original data for mandibular asymmetry of
Conclusions
No statistically significant sex- or side-specific mandibular asymmetries were found among the 3 groups; CAI values were significantly higher compared with the 3% threshold value of Habets et al11 in each group, but comparisons between groups were not statistically significant.
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The authors report no commercial, proprietary, or financial interest in the products or companies described in this article.