正常[牙合]青年[牙合]平面与咀嚼运动轨迹的相关性分析  

Relationship between occlusal plane and mastlcatory path in youth with individual normal occlusion

作　　者：林雪峰[1] 李少华[1] 黄卓珊[1] 吴夏怡[1] 

机构地区：[1]中山大学光华口腔医学院·附属口腔医院修复科·中山大学口腔医学研究所,广州510055

出　　处：《中华口腔医学杂志》2010年第6期370-375,共6页Chinese Journal of Stomatology

摘　　要：目的分析个别正常骀青年[牙合]平面与咀嚼运动轨迹特征的相关性，以期为临床定位[牙合]平面提供参考。方法收集43名个别正常[牙合]青年志愿者，拍摄头颅侧位X线片，测量[牙合]平面倾斜度（OP—CP）；记录下颌中切牙切点的左右侧咀嚼运动轨迹，测量矢状面垂直向最大位移（V）、矢状面水平向前后最大位移之和（P＋A）、冠状面水平向左右侧方位移之和（L＋R）以及胎平面与咀嚼运动轨迹的夹角，对[牙合]平面倾斜度（OP—CP）与V、（P＋A）、（L＋R）以及骀平面与咀嚼运动轨迹的夹角进行Pearson线性相关分析。结果OP—CP为（2．1±3．8）°。V为（20．22±4．28）mm，（P＋A）为（11．42±2．45）mm，（L＋R）为（8．62±1．52）mm。OP-CP与（L＋R）呈负相关，相关系数r为-0．39（P〈0．05）。矢状面[牙合]平面与牙尖交错位及其附近的咀嚼运动开闭口轨迹近似垂直；OP-CP与咀嚼运动轨迹[牙合]期阶段2．0mm、[牙合]外期上段的殆平面-闭口轨迹角呈正相关（P〈0．05）；咀嚼轴角平均为（66．50±7．98）°，与OP—CP不相关（P〉0．05）。结论矢状面[牙合]平面倾斜度与咀嚼运动轨迹有一定相关性。[牙合]平面对咀嚼运动胎期闭合轨迹的影响较明显。Objective To investigate the characteristics of and relationship between occlusal plane and masticatory path in young adults with individual normal occlusion, and to provide clinical implications on both morphological and functional reference of occlusal plane location Methods Forty-three young adults with individual normal occlusion were included. Lateral projections of cephalometric radiographs were taken. The parameters of anatomical landmarks were analyzed. The BioEGN mandibular kinesiography analyzer was used to record the path of incisal edge of mandibular central incisor movement during mastication. The Pearson＇s linear correlation analysis was performed to analyze the relationship of inclination of occlusal plane and data mentioned above with SPSS13.0 software. Results The inclination of occlusal plane （the angle between occlusal plane and Camper＇s line OP-CP） was （2. 1 ±3.8 ） ° in youth with normal occlusion. Means of maximal distances of 3-dimensional masticatory mandibular movement paths were as follow： the vertical length was （20. 22 ±4. 28 ） mm, the anterior-posterior width was （ 11.42 ±2.45 ） mm, and the lateral width was （8. 62 ±1.52） mm. The inclination of occlusal plane was negatively correlated to the lateral width of masticatory path in frontal plane（r = -0. 39, P 〈 0. 05）. Occlusal plane was approximately vertical to the opening and closing path in the vicinity of intercuspal position during mastication. The inclination of occlusal plane was positively related to occlusal plane-closing angles in the upper segments of closing path during mastication（ P 〈 0. 05 ）. Masticatory axis angle was （ 66. 50 ±7. 98 ） ° with no significant correlation to the inclination of occlusal plane（P 〉 0. 05）. Conclusions These results suggest that the sagittal inclination of occlusal plane can influence 3-dimensional morphology of masticatory path. The inclination of occlusal plane has a guiding effect on masticatory movement in the upper segments of closing pa

关 键 词：牙[牙合] 咀嚼 头影测量 

分 类 号：R783.5[医药卫生—口腔医学]