Condylar positioning changes following unilateral sagittal split ramus osteotomy in XXXX with mandibular prognathism.

@entity1 @entity135 @entity3233 @entity7439
BACKGROUND: This study was performed to evaluate three-dimensional positional change of the condyle using three-dimensional computed tomography (3D-CT) following unilateral sagittal split ramus osteotomy (USSRO) in @entity1 with mandibular prognathism. METHODS: This study examined two @entity1 exhibiting skeletal @entity3233 with @entity7439 who underwent USSRO for a mandibular setback. 3D-CT was performed before surgery, immediately after surgery, and 6  months postoperatively. After creating 3D-CT images by using the In-vivo 5    program, the axial plane, coronal plane, and sagittal plane were configured. Three-dimensional positional changes from each plane to the condyle, @entity135 ( @entity135 ), @entity135 ( @entity135 ), @entity135 ( @entity135 ), frontal condylar head position (FHP), @entity135 ( @entity135 ), and sagittal condylar head position (SHP) of the two @entity1 were measured before surgery, immediately after surgery, and 6  months postoperatively. RESULTS: In the first @entity1 , medial rotation of the operated condyle in @entity135 and anterior rotation in @entity135 were observed. There were no significant changes after surgery in @entity135 , FHP, and SHP after surgery. In the second @entity1 , medial rotation of the operated condyle in @entity135 and lateral rotation of the operated condyle in @entity135 were observed. There were no significant changes in @entity135 , FHP, and SHP postoperatively. This indicates that in USSRO, postoperative movement of the condylar head is insignificant; however, medial rotation of the condylar head is possible. Although three-dimensional changes were observed, these were not clinically significant. CONCLUSIONS: The results of this study suggest that although three-dimensional changes in condylar head position are observed in @entity1 post SSRO, there are no significant changes that would clinically affect the @entity1 .
