Moroi A, Yoshizawa K, Iguchi R, Kosaka A, Ikawa H, Saida Y, Hotta A, Tsutsui T, Ueki K
Department of Oral and Maxillofacial Surgery, Division of Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Yamanashi, Japan.
Department of Oral and Maxillofacial Surgery, Division of Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Yamanashi, Japan.
Int J Oral Maxillofac Surg. 2016 Dec;45(12):1520-1525. doi: 10.1016/j.ijom.2016.08.015. Epub 2016 Sep 12.
The purpose of this study was to compare computed tomography (CT) Hounsfield unit values of bone fragment gaps after sagittal split ramus osteotomy (SSRO) in patients with and without asymmetry, and to evaluate differences between the deviated and non-deviated sides in asymmetric patients. Thirty-two patients who underwent a bilateral SSRO were included in this retrospective study. Patients were divided into symmetric and asymmetric groups by cephalometric analysis. CT values of the bone fragment gap were measured at 1 week and at 1 year after surgery. There were significant differences between CT values obtained at 1 week and at 1 year after surgery for all measurement points. However, there were no significant differences in CT values between symmetric and asymmetric patients at either 1 week or 1 year after surgery. Among asymmetric patients, there were no significant differences between the deviated and non-deviated sides at 1 week or 1 year after surgery. This study showed ossification of the bone fragments and adaptation to change the mandible form in patients with and without asymmetry following SSRO.
本研究的目的是比较矢状劈开下颌支截骨术（SSRO）后有不对称和无不对称患者骨碎片间隙的计算机断层扫描（CT）亨氏单位值，并评估不对称患者患侧与非患侧之间的差异。本回顾性研究纳入了32例行双侧SSRO的患者。通过头影测量分析将患者分为对称组和不对称组。在术后1周和1年测量骨碎片间隙的CT值。所有测量点术后1周和1年获得的CT值之间存在显著差异。然而，术后1周或1年时，对称和不对称患者的CT值均无显著差异。在不对称患者中，术后1周或1年时患侧与非患侧之间无显著差异。本研究显示，SSRO后有不对称和无不对称的患者均出现了骨碎片的骨化以及下颌骨形态改变的适应性变化。
