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目的:探讨中老年磨牙隐裂患者的咬合接触特点。方法:应用T-scanⅡ咬合分析仪对20例上颌第一磨牙隐裂的患者进行牙尖交错位、前伸及侧方运动的咬合检查,并与同年龄段的个别正常进行对照。结果:对照组两侧力均衡,牙隐裂组力中心略偏向隐裂磨牙侧,隐裂侧力百分比值平均较同颌健侧高11.22%,隐裂上颌第一磨牙区咬合接触点数目平均为3.5个,位于裂纹两侧牙尖斜面;牙隐裂组干扰出现率高达80%。结论:不均衡咬合与干扰是磨牙隐裂的主要致病因子之一。
Objective: To investigate the characteristics of occlusal contact in patients with occult fractures of middle-aged and elderly patients. Methods: T-scan Ⅱ occlusion analyzer was used to examine the occlusal position of the cusp tooth, anteversion and lateral movement in 20 patients with maxillary first molar occlusion. The control group was compared with that of the same age group. Results: On both sides of the control group, the force balance was equal. The stress center of the occlusion group was slightly offset to the occlusal molars side. The average percentage of occlusion force on the occlusal side was 11.22% The average number of points is 3.5, which is located on the cusp slopes on both sides of the crack. The occurence rate of the occlusion group is as high as 80%. Conclusions: Unbalanced bite and disturbance are one of the main causative factors in the occlusion of molars.