Comparison of volume and position of the temporomandibular joint structures in patients with mandibular asymmetry

Publication date: Available online 31 August 2016
Source:Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
Author(s): Jae-Young Kim, Bum-Joon Kim, Kwang-Ho Park, Jong-Ki Huh
ObjectiveTo evaluate the volume and position of the temporomandibular joint structures, specifically the glenoid fossa and condylar head, in patients with facial asymmetry.Study DesignFifty-six adult patients were divided into two groups, an asymmetry group and control group, based on the severity of mandibular asymmetry on their orthopantomograms. The volumes and positions of the bilateral temporomandibular joint components were measured using computed tomography images and a 3D analysis program. Each of the variables was compared between and within the groups.ResultsThe volumes of the condyle and glenoid fossa on the side of the smaller condyle were significantly smaller in the asymmetry group (p < 0.05) than the control group. The volumetric ratios of the glenoid fossa and joint space to the condyle were also significantly higher on that side (p < 0.001). The distance of the uppermost point of the glenoid fossa from the midaxial plane in the smaller condyle was significantly shorter (p < 0.05) only in the asymmetry group.ConclusionWhen evaluating mandibular asymmetry, the volume of the glenoid fossa and volume and vertical position of the condylar head need to be considered in addition to length or width of the condylar head.



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