摘要
目的:应用锥形束CT(cone-beam computed tomography,CBCT)比较双侧下颌支矢状劈开(SSRO)不对称后退下颌骨(asymmetric mandibular setback,AMS)术后两侧髁突位置的变化。方法:16例下颌偏突颌畸形患者,采用双侧下颌升支矢状劈开截骨术(BSSRO)后退下颌骨,小钛板坚固内固定(rigid internal fixation,RIF),分别于术前(T0)和术后1周(T1)做CBCT检查,利用InVivo dental软件测量双侧髁突的位置及角度变化,采用SPSSStatistics 17.0软件对数据进行统计分析。结果:术前除冠状位髁突头长轴的角度外,两侧髁突各观测指标均无统计学差异,术后1周两侧冠状位髁突颈的角度、轴位两侧髁突头的角度变化、冠状位后退距离小的一侧髁突颈的角度变化、矢状位后退距离大的一侧髁突前后向位置变化有统计学意义,两侧的改变程度仅轴位内外向变化和矢状位前后向变化具有统计学意义。结论:小钛板坚固内固定的SSRO不对称后退下颌骨可能会对两侧髁突产生不同的影响。
Objective： To compare the positional changes of the condylar between greater setback side（GSS） and lesser setback side （LSS） after asymmetric mandibular setback （AMS） using cone beam computed tomography （CBCT）. Methods： 16 skeletal class Ⅲ malocclusion patients with mandibular prognathism and facial asymmetry, who underwent bilateral sagittal split ramus osteotomy（BSSRO） with miniplate rigid internal fixation, were assessed by CBCT before surgery（T0） and 1 week after surgery（T1）. Results： At TO stage, all the variables, except for coronal condylar head long axis angle（CHA）, showed significant difference. At T1 stage, the coronal condylar neck long axis angle （CNA） showed significantly different between the two sides. The axial condylar head long axis angle（AHA） in both GSS and LSS, the CNA in the lesser setback side and the anteroposterior condylar position （AP） in GSS on the sagittal view showed statistically different from that at T0 stage. As far as the magnitude of the change, only the axial mediolateral condylar position and the sagittal anteroposterior condylar position showed statistically different between two sides. Conclusion： These results suggest that AMS by SSRO with RIF might bring some different effects to the condylar in GSS and LSS.
出处
《口腔医学研究》
CAS
CSCD
2013年第5期446-449,共4页
Journal of Oral Science Research
