使用下颌升支矢状劈开截骨术对下颌不对称后退手术后下颌宽度进行三维评估。
Three-dimensional evaluation of mandibular width after mandibular asymmetric setback surgery using sagittal split ramus osteotomy.
作者信息
Kim Seong-Sik, Kim Sung-Hun, Kim Yong-Il, Park Soo-Byung
机构信息
Department of Orthodontics, Dental Research Institute, and Dental and Life Science Institute, School of Dentistry, Pusan National University, Yangsan, Korea.
出版信息
Korean J Orthod. 2023 Mar 25;53(2):99-105. doi: 10.4041/kjod22.077.
OBJECTIVE
The study aimed to evaluate the changes in mandibular width after sagittal split ramus osteotomy (SSRO) in patients with mandibular asymmetric prognathism using cone-beam computed tomography (CBCT).
METHODS
Seventy patients who underwent SSRO for mandibular setback surgery were included in two groups, symmetric (n = 35) and asymmetric (n = 35), which were divided according to the differences in their right and left setback amounts. The mandibular width was evaluated three-dimensionally using CBCT images taken immediately before surgery (T1), 3 days after surgery (T2), and 6 months after surgery (T3). Repeated measures analysis of variance was applied to verify the differences in mandibular width statistically.
RESULTS
Both groups showed a significant increase in the mandibular width at T2, followed by a significant decrease at T3. No significant difference was observed between T1 and T3 in any of the measurements. No significant differences were found between the two groups ( > 0.05).
CONCLUSIONS
After mandibular asymmetric setback surgery using SSRO, the mandibular width increased immediately but returned to its original width 6 months after surgery.
目的
本研究旨在使用锥形束计算机断层扫描（CBCT）评估下颌骨不对称前突患者行矢状劈开下颌支截骨术（SSRO）后下颌骨宽度的变化。
方法
70例行SSRO下颌后缩手术的患者被纳入两组，对称组（n = 35）和不对称组（n = 35），根据左右后缩量的差异进行分组。使用术前即刻（T1）、术后3天（T2）和术后6个月（T3）拍摄的CBCT图像对下颌骨宽度进行三维评估。采用重复测量方差分析对下颌骨宽度的差异进行统计学验证。
结果
两组在T2时下颌骨宽度均显著增加，随后在T3时显著减小。在任何测量中，T1和T3之间均未观察到显著差异。两组之间未发现显著差异（> 0.05）。
结论
使用SSRO进行下颌骨不对称后缩手术后，下颌骨宽度立即增加，但在术后6个月恢复到原始宽度。
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