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通过老年查体选择因咬合面磨耗及部分缺牙致咬合垂直距离(简称OVD)减低但仍有正中(牙合)关系,以咬合垫式可摘部分义齿修复适当恢复OVD者20例,平均69岁,检查其口腔情况、咬合关系和有无颞颌关节紊乱综合征临床表现,并分别于戴与不戴义齿时测定其OVD、嚼肌和颞肌的肌电图、TMJ关节间隙及头影测量的有关结构指标。结果表明,患者对咬合垫式义齿均能适应,使用良好,无一例发生口颌系统结构与功能紊乱。经测定,随OVD的增加,TMJ关节间隙和下颌位置等结构指标均趋于正常,肌电变化不显著。结果提示,正确的OVD不是一个固定不变的位置,而应是一个生理范围;在咬合间隙范围内适当恢复其OVD是需要的,也是可行的。
20 cases of OVD due to occlusal pad removable partial dentures were repaired due to occlusion surface wear and partial edentulous orthodontic occlusion vertical distance (OVD) reduction but there was still a median occlusion, with an average of 69 Aged, check their oral conditions, occlusion and the presence or absence of clinical manifestations of TMJ disorders, and were measured with or without dentition when the OVD, EMG of the chewing muscles and temporal muscles, TMJ joint space and head shadow Measurement of the relevant structural indicators. The results showed that the patient can adapt to the bite pad denture, good use, no case of oral jaw system structure and dysfunction. It was measured, with the increase of OVD, TMJ joint space and jaw position and other structural parameters tend to be normal, EMG changes insignificant. The results suggest that the correct OVD is not a fixed location, but rather a physiological range; proper recovery of its OVD over the occlusal space is both desirable and feasible.