【摘要】 目的对正常(牙合)牙尖交错位(ICP)最大(牙合)力咬合进行定量研究,初步探讨 ICP 咬合平衡的生理范围。方法应用 T-Scan Ⅱ系统记录123名正常(牙合)者 ICP 最大(牙合)力的咬合情况,测量并计算力的中心点(COF)、(牙合)力百分比值、(牙合)接触点数目。结果正常(牙合)者 ICP 最大(牙合)力时力的中心点相对位置、(牙合)力百分比差值以及不对称系数均服从正态分布,95%参考值范围分别为:-6.60～6.68 mm,-15.50%～12.10%,0.65～1.39;98.4%的正常(牙合)者 ICP 最大(牙合)力咬合时力的中心点分布于后牙区。结论正常(牙合)者最大(牙合)力时 ICP 咬合是稳定、平衡的咬合。更多还原

【Abstract】 Objective To assess occlusal balance of normal occlusion in intercuspal position with maximal bite force.Methods Maximal bite force was recorded in intercuspal position by use of T-Scan Ⅱ system from 123 subjects with normal intact dentitions.Occlusal balance of normal occlusion was quantitatively analyzed from center of force,percentage of bite force,and occlusal contacts.Results The relative position of the center of bite force,the difference in bilateral force percentage,and unsymmetrical coefficient followed normal distributions.The 95% reference ranges for corresponding testing items were -6.60 to 6.68 mm,-15.50% to 12.10%,and 0.65 to 1.39.There was no statistic difference(P= 0.915)in occlusal contacts between left and right sides.The 98.4% of normal occlusion subjects had the center of bite force locating in posterior region of dentition when biting with maximal force in intercuspal position.Conclusions Occlusal blance could be evaluated by T-Scan Ⅱ system.Occlusion of normal subjects biting with maximal force was stable and bilaterally balanced in intercuspal position.更多还原