摘要
目的探讨单侧磨牙正锁牙合者下颌边缘运动轨迹的特征及其与正常牙合人群的差异。方法选择单侧磨牙正锁牙合者18例作为实验组,牙合关系正常者18例作为对照组,应用ARCUSdigmaⅡ下颌运动轨迹描记仪记录下颌边缘运动的轨迹。采用SPSS 17.0统计软件分析比较两组间各指标的差值情况。结果实验组的下颌边缘运动轨迹较对照组出现曲折、台阶以及摆动幅度较大;实验组下颌前伸边缘运动范围小于对照组(P<0.05),下颌向锁牙合侧边缘运动时,与对照组比较差异有统计学意义(P<0.05);实验组的髁突运动最大差数(MRC)指数与对照组比较,在开口边缘运动(前后向)和前伸边缘运动(前后向及垂直向)差异有统计学意义(P<0.05)。结论单侧磨牙正锁牙合对下颌切点边缘运动的轨迹特征、边缘运动的范围以及双侧髁突运动的对称性具有影响。
Objective To investigate the characteristics of the mandibular border movement traces in patients with unilateral molar buccal crossbite and to compare the difference with the individual normal occlusion. Methods Eighteen volunteers with normal occlusion as control group and eighteen patients with unilateral molar buccal cross- bite as experimental group were tested by ARCUSdigma Ⅱ system for the mandibular border movement traces. The movement traces were recorded. The data were analyzed using SPSS 17.0 software package to compare the differ- ence between the two groups. Results The mandibular border movement traces of incisor point were rugged and large fluctuation in experimental group; protrusive border movements in experimental group were less than that in control group （P 〈 0. 05 ）. Lateral movement of buccal sides was significantly different from control group （ P 〈 0. 05 ） ; maximum remainder of bilateral condylar movements （MRC） of opening movement （anterior-posterior） and protrusive movements（ vertical and anterior-posterior） were significantly different from control group （P 〈 0. 05 ）. Conclusion The unilateral molar buccal crossbite can affect feature and range in border movements of incisor point, also affect symmetry of condylar movements.
出处
《安徽医科大学学报》
CAS
北大核心
2014年第4期526-529,共4页
Acta Universitatis Medicinalis Anhui
基金
安徽省自然科学基金(编号:11040606M204)
关键词
下颌运动轨迹
正锁[牙合]
切点
髁突
mandibular movement traces
buccal crossbite
incisor point
condylar process
