Department of Oral and Maxillofacial Surgery, (Head: Prof. Dr. K Ueki), Division of Medicine, Interdisciplinary Graduate School, University of Yamanashi, 1110 Shimokato, Chuo-shi, Yamanashi, 409-3898, Japan.
Department of Oral and Maxillofacial Surgery, (Head: Prof. Dr. K Ueki), Division of Medicine, Interdisciplinary Graduate School, University of Yamanashi, 1110 Shimokato, Chuo-shi, Yamanashi, 409-3898, Japan.
J Craniomaxillofac Surg. 2017 Sep;45(9):1415-1418. doi: 10.1016/j.jcms.2017.06.026. Epub 2017 Jul 8.
The purpose of this study was to examine lip closing force in Class II and III patients before and after orthognathic surgery.
The subjects were 45 patients (15 Class II women, 15 Class III men and 15 Class III women) diagnosed with jaw deformity who underwent sagittal split ramus osteotomy with Le Fort I osteotomy and 30 controls with normal skeleton and occlusion (15 men, 15 women). Maximum and minimum lip closing forces were measured using Lip De Cum before and after surgery, and compared statistically.
In the Class II women, maximum and minimum lip closing forces did not change after surgery. However, maximum and minimum lip pressure increased significantly in the Class III men (P = 0.0116, P = 0.0295) and maximum lip closing force increased significantly in the Class III women (P = 0.0082). After 6 months, maximum lip closing force was significantly lower in both Classes II and III women than in the control women (P = 0.0002, P = 0.0045).
This study suggested that maximum postoperative lip pressure did not improve in the Class II women, although maximum lip closing force increased in the Class III men and women after sagittal split ramus osteotomy with Le Fort I osteotomy.
本研究旨在探讨正颌手术后 II 类和 III 类患者的唇闭合力。
研究对象为 45 例（15 例女性 II 类，15 例男性 III 类，15 例女性 III 类）颌骨畸形患者，均接受矢状劈开截骨术联合 Le Fort I 截骨术，对照组为 30 例骨骼和咬合正常者（15 例男性，15 例女性）。手术前后采用 Lip De Cum 测量最大和最小唇闭合力，并进行统计学比较。
在女性 II 类患者中，手术后最大和最小唇闭合力没有变化。然而，男性 III 类患者的最大和最小唇压显著增加（P=0.0116，P=0.0295），女性 III 类患者的最大唇闭合力也显著增加（P=0.0082）。术后 6 个月，女性 II 类和 III 类患者的最大唇闭合力明显低于对照组女性（P=0.0002，P=0.0045）。
本研究表明，女性 II 类患者的最大术后唇压没有改善，尽管男性 III 类和女性 III 类患者在接受矢状劈开截骨术联合 Le Fort I 截骨术后最大唇闭合力增加。
