顎関節症患者における上顎関節腔滑膜組織の内視鏡学的観察と顎関節痛との関連性

抄録

Based on arthroscopic findings in patients with temporomandibular joint arthrosis, the present study divided the synovial membrane in the upper joint cavity into anterior and posterior sections in relation to the articular disc. The relationship between temporomandibular arthralgia and site of synovitis was investigated. Temporomandibular arthralgia was assessed using the Visual Analog Scale, and severity of arthralgia during resting, mouth opening, protrusive movement, lateral movement, clenching and occlusion was quantified. Results:A correlation was observed between synovitis and temporomandibular arthralgia (p<0.01). Synovitis occurred most often in the posterior section, followed by the posterior region of the anterior section, and anterior section, respectively. Anterior synovitis correlated to pain during mouth opening, protrusive movement, lateral movement of the affected side, and lateral movement of the normal side. Posterior synovitis was associated with pain during mouth opening, protrusive movement, lateral movement of the affected side and occlusion. Degree of arthralgia during mouth opening associated with posterior synovitis was significantly worse than that associated with anterior synovitis (p<0.05). However, the degree of correlation between synovitis and pain at rest and during clenching was low.