Relationships between Mandibular Lateral Deviation and Morphology of the Cranial Vault

概要

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In facial asymmetry cases, there seems to be a morphologic and functional imbalance related to the maxilla and mandible, TMJ and masticatory muscles. There have not been many reports on the relationship between the deformity of the cranial vault and mandibular deviation. The purpose of this study was to clarify the relationship between the deformity of the cranial vault and mandibular deviation by using submental-vertical radiograms.<BR>Submental-vertical radiograms of 33 cases (patients from the Niigata University Dental Hospital, students of Niigata University and volunteers) were take and analyzed. The cases were divided into 2 groups which were compared with each other. Group1was composed of persons who had large mandibular deviation (|Dev.|≥4°). Group 2 was composed of persons who had smaller mandibular deviation.<BR>The result shows that in group 1 the morphology of the temporal portion of the horizontal cranial vault was more concave on the side with deviation than the other side. It is suggested that cranial deformity is significantly related to mandibular deviation and cranial and mandibular deformity seems to be linked with asymmetry in condylar movement and functional imbalance of the masticatory muscles.
特定非営利活動法人日本顎変形症学会の論文