下颌骨自动旋转中心与上颌骨上抬量的相关性研究  

Inter-relationship between mandibular rotation center and maxillary Le Fort I impaction osteotomies

作　　者：娄新田[1] 沈国芳[2] 冯贻苗[3] 房兵[2] 吴勇[2] 朱敏[2] 

机构地区：[1]上海市浦东新区浦南医院口腔科,上海200125 [2]上海交通大学医学院附属第九人民医院·口腔医学院口腔颅颌面科,上海市口腔医学重点实验室,上海200011 [3]浙江大学医学院附属第二医院口腔科,浙江杭州310009

出　　处：《上海口腔医学》2014年第6期704-707,共4页Shanghai Journal of Stomatology

基　　金：浦东新区科技发展基金创新资金(PKJ2011-Y14);浦东新区卫生系统优秀青年医学人才培养基金(PWRq2010-12)~~

摘　　要：目的:探讨Le Fort I型截骨术上抬上颌骨时下颌骨自动旋转中心的位置,下颌骨自动旋转中心与上颌骨上抬量、下颌骨长度和下颌平面角的关系。方法:选取25例单纯采用Le Fort I型截骨术上抬上颌骨矫治垂直向发育过度的患者,测量其术前、术后头颅定位侧位片。利用Reuleaux法测量实际下颌骨旋转中心。采用SPSS13.0软件包对ANS、PNS上抬量、下颌骨长度、MP-SN角度与下颌骨自动旋转中心进行Pearson相关和线性回归分析。结果:下颌骨自动旋转中心平均位于髁突中点下方15.64 mm,后方0.82 mm处。ANS点和PNS点上抬量、下颌骨长度与下颌骨自动旋转中心位置相关,MP-SN角度与下颌骨旋转中心垂直向位置相关。结论:下颌骨自动旋转中心位于髁突外,其与上颌骨上抬量、下颌骨长度和下颌平面角相关。PURPOSE： The purpose of the present investigation was to locate the instantaneous rotation center of the mandible during maxillary surgical impaction, and explore the relationship between automatic rotation center of the mandible and maxillary elevation amount, the length of the mandible and mandibular plane angle. METHODS： Twenty-five patients who underwent maxillary Le Fort I impaetion without coneomitant major mandibular ramus split osteotomies were included. The preoperative and postoperative lateral cephalograms were used to evaluate the surgical changes and locate the mandibular autorotation center with Reuleaux method. The automatic rotation center of the mandible was compared to the maxillary elevation amount, the length of the mandible and mandibular plane angle with Pearson correlation and linear regression analysis. The data was analyzed by SPSS 13.0 software package. RESULTS： The mandibular automatic rotation center was located in average 15.64 mm below and 0.82 mm behind the center of the condylar head in these 25 patients. The correlation analysis demonstrated a positive correlation between maxillary elevation amount, the length of the mandible and the position of the rotation center of the mandible. Similar positive correlation was presented between the mandibular plane angle and the vertical position of the rotation center of the mandible. CONCLUSIONS： The rotation center in 25 cases werelocated outside the condylar head. The maxillary elevation amount, the length of the mandible and the mandibular plane angle was positively correlated to the position of the rotation center of the mandible.

关 键 词：上颌骨垂直向发育过度 LE FORT I型截骨术 上颌骨上抬 下颌骨自动旋转 旋转中心 

分 类 号：R782.2[医药卫生—口腔医学]