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目的:研究牙齿重度磨耗对息止间隙的影响。方法:采用下颌运动轨迹描记仪,记录30例中老年重度牙齿磨耗患者的息止间隙,并以8例正常的息止间隙作为对照。结果:下颌由姿势位闭合至牙尖交错位,Ⅰ型磨耗患者下颌多向后移,Ⅱ、Ⅲ型磨耗患者下颌多向侧移;磨耗患者开闭口运动轨迹重复性差;ICP的稳定性显著下降。息止间隙增大,其中Ⅰ、Ⅲ组息止间隙显著大于对照组,Ⅱ组有增加的趋势。结论:严重磨耗导致异常的息止间隙。
OBJECTIVE: To study the effect of severe dental wear on the clearance of nausea and abdomen. Methods: The mandibular movement track record instrument was used to record the nocturnal clearance of 30 patients with severe dental wear in middle-aged and elderly patients. Eight patients with normal nocturnal circulation were used as controls. Results: The mandibular position closed to the cusp position, the type Ⅰ wear more backward mandibular movement, type Ⅱ, Ⅲ wear multi-lateral mandibular movement; wear and tear opening and closing port movement trajectory repeatability; ICP stability was significantly decreased . Interestingly, the gap increased, of which, group I and group Histatic gap was significantly larger than the control group, group II increased trend. Conclusion: Severe abrasions lead to abnormal resting spaces.