摘要
目的:应用计算机咬合分析系统,评价正颌手术前后骨性III类错牙合患者牙合力的变化。方法:收集15例骨性III类错牙合需正颌手术病例,利用T-ScanII牙合诊断分析系统在术前1周内、术后3个月和术后6个月时对患者的牙合力进行测定,分析患者的总牙合力(TOF)、MIP/MAX指数、牙合力不对称指数(AOF)、牙合力中心点位置(COF)及咀嚼时最大位移距离(MCOF),应用配对t检验进行比较研究。结果:术后3个月时TOF有所上升,6个月时与术前水平相比已有显著差异(P<0.05),说明患者牙合力水平已有提高。MIP/MAX指数略有下降,但6个月时增大并超过术前水平。AOF术后呈下降趋势,在3个月和6个月时均比术前显著减小(P<0.01,P<0.001)。术后COF逐渐接近正常,MCOF减小,术后6个月时均较术前明显改善,说明患者牙合力水平已有提高。结论:正颌正畸联合治疗能够改善骨性III类错牙合患者的牙合力水平及力平衡性。
PURPOSE: To evaluate the functional change of mandibular movement on skeletal Class III malocclusal patients before and after orthognathic surgery with control group. METHODS: Mandibular movements of 15 skeletal Class III malocclusal patients and 20 controls were investigated by mandibular kinesiograph (ARCUSDigma, KAVO). Centric maximum mouth opening(MMO), protrusive and laterotrusive movements were measured and the same procedure was performed by 3 months and 6 months postoperatively on patient group. Distances of mandibular movements and maximum remainder of bilateral condylar movements(MRC) were analyzed by means of Student's t test. RESULTS: A significant difference was found in protrusive movements between patient group and control group(P<0.05), however the MMO was larger than the control group. MRC of patients was larger than the control group and the statistical difference was found in centric mouth opening movements(P<0.05). Hypomobility occurred in MMO and left laterotrusive movement 3 months postoperatively. Protrusive movements were improved and MRC increased by 3 months postoperatively.Mandibular movements were improved by 6 months postoperatively, statistical differences were not found in the protrusive and laterotrusive movements and MRC value between patient group and control group which demonstrated that the mandibular movement function was improved after orthognathic surgery. CONCLUSION: Mandibular movements of skeletal Class III malocclusal patients were different from the control group. Orthognathic surgery has favorable effects on the function of mandibular movements.
出处
《中国口腔颌面外科杂志》
CAS
2005年第1期19-23,共5页
China Journal of Oral and Maxillofacial Surgery
关键词
骨性Ⅲ类错He畸形
下颌运动轨迹
正颌外科
咀嚼功能
Skeletal Class III malocclusion
Mandibular kinesiograph
Orthognathic surgery
Masticatory function
