Influence of mandibular deviation on maxillofacial morphology evaluated by cone beam computed tomography

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The muscular function of the jaw is concerned with maxillofacial growth and the development of the masticatory muscles. We divided the subjects into the two patterns, the Cant Group and the Rotation Group, based on the horizontal displacement of the mandible observed in postero-anterior cephalometric radiographs. The bone thickness and structure were evaluated by cone beam computed tomography (CT), and occlusal forces were measured with the Dental Prescale. Statistical differences between the two groups were found in the LOL' -ag line, lateral deviation (Shift) and cancellous bone width. In addition, a significant positive correlation was found between the pattern of mandibular deviation and the width of the cancellous mandibular alveolar bone. The results suggest that the pattern of mandibular deviation influences maxillofacial morphology, especially the gonion and lateral deviation (shift). The pattern of mandibular deviation related not only to masticatory function, but also to lower facial morphology. We concluded that the shape and structure of the mandibular alveolar bone are very important, not only for understanding its biomechanical significance associated with masticatory function, but also for understanding the occurrence of unfavorable sequelae resulting from orthodontic treatment.