Abstract
AbstractThe aims of this study were to perform a three‐dimensional analysis of the craniofacial area, in particular, the temporal bone and to examine the morphological relationship between the temporal bone and asymmetry of the mandible in subjects with mandibular prognathism and facial asymmetry. Subjects were 50 adult orthognathic patients with facial asymmetry and mandibular prognathism. The initial computed tomographic data were reconstructed into three‐dimensional and multiplanar reconstruction images. Linear and angular measurements of the temporal bone and the mandible were obtained. Then deviated and non‐deviated sides were compared and the relationship between the temporal bone and mandibular morphology was investigated. The lengths of the mandibular body and ramus, the anteroposterior and vertical positions of the mandibular fossa, and the slant angle of the posterior surface of the petrous pyramid were significantly smaller (P < .05) on the deviated side than on the non‐deviated side. Further, the left‐right differences in the temporal bone were positively correlated with a deviation of the mandible and differences in the lengths of the mandibular body and ramus (P < .05). The results suggest that asymmetry of the temporal bone is closely related to mandibular asymmetry and might have an important role in the mechanism of facial asymmetry.
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