咬合接触状態の不均衡が顎関節部粘弾性特性に及ぼす影響

概要

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The purpose of this study was to investigate the influence of unbalanced occlusal contact in intercuspal position on viscoelasticity of the TMJ region. The viscoelasticity of the TMJ region (viscosity: c, elasticity: k, mass: m) was measured using a TMJ viscoelasticity analyzer. Ten healthy volunteers and 28 patients with temporomandibular disorders were selected for experiment 1. The occlusal state was evaluated by add-picture system. The patients were divided into stable and unstable groups between right and left (SGRL and UGRL) with an asymmetry index of the occlusal area. Ten healthy volunteers were selected for experiment 2. Balanced and unbalanced occlusal contacts were applied by occlusal appliances, and volunteers were asked to clench for 1 minute. The viscoelasticity of the TMJ region was measured using TMJ viscoelasticity analyzer before clenching, immediately after and 2, 5, and 10 minutes after clenching.<BR>In experiment 1, the viscoelasticity in UGRL was statistically higher than that in SGRL in c, and in the healthy volunteers and SGRL in k. In experiment 2, there was no variation in the balanced group. k was statistically varied before and after clenching in the unbalanced group. Reduced and increased values were observed immediately after and 2 minutes after clenching in anterior-posterior and right-left unbalanced occlusal contact, respectively.
社団法人日本補綴歯科学会の論文
1997-04-01