Department of Orthodontics, Pusan National University, Busan, South Korea.
J Oral Rehabil. 2010 Apr;37(4):262-70. doi: 10.1111/j.1365-2842.2009.02056.x. Epub 2010 Jan 25.
The purpose of this study was to compare the short- and long-term changes in condylar position related to the glenoid fossa, and skeletal and occlusal stability after orthognathic surgery. All of the study patients were assessed by cone-beam computed tomography images for condylar rotational changes and anteroposterior position in the pre-surgery, post-surgery and post-retention period. The condylar positions were evaluated on three planes: axial, coronal and sagittal. In the skeletal and occlusal measurements, there was no significant difference between the post-surgery group and the post-retention group. After sagittal split ramus osteotomy (SSRO), the condyle on the axial plane rotated inward (P < 0.05) and maintained during the post-retention period. In the anteroposterior condylar position related to the glenoid fossa, the condyles had changed from the anterior position in the pre-surgery group to a concentric position in the post-surgery group and then returned to the anterior position in the post-retention groups. These results suggested that the changed anteroposterior condylar position in the glenoid fossa after SSRO with rigid fixation had moved from a concentric to anterior position for post-retention period.
本研究旨在比较正颌手术后髁突位置与颞下颌关节窝、骨骼和咬合稳定性的短期和长期变化。所有研究患者均通过锥形束 CT 图像评估髁突旋转变化和术前、术后及保持期的前后位置。髁突位置在三个平面上进行评估：轴位、冠状位和矢状位。在骨骼和咬合测量方面，术后组与保持组之间无显著差异。在矢状劈开截骨术后，髁突在轴位上向内旋转（P < 0.05）并在保持期内保持。在与颞下颌关节窝相关的髁突前后位置方面，髁突从前位变为术后组的同心位，然后在保持期又回到前位。这些结果表明，在刚性固定的 SSRO 后，髁突在颞下颌关节窝中的前后位置发生变化，从术前的同心位变为术后保持期的前位。
