Kosuke Kashiwagi

Prognostic factor of mandibular condylar movement exercise for patients with internal derangement of the temporomandibular joint on initial presentation: Preliminary report

PURPOSE The aim of this study is to examine the factors, which predict the effect of mandibular condylar movement exercise (MCME). MATERIAL AND METHODS We investigated the efficiency of MCME and the significant difference in average age and the mean duration length of closed lock symptoms prior to the initial consultation in both success cases and failure cases in initial visiting. Seventy-four women aged between 19 and 75 (mean: 41.4) years were included in this study. RESULTS On the initial visiting day, the success cases were 50 cases (67.6%) and the failures were 24 cases (23.4%). The average age of success cases is 38.0 years, and failure cases are 48.4 years. Duration of the lock in success cases is 35.3 days, and failure cases are 87.6 days. CONCLUSION These results suggested that lower improvement rates thus correlated with increasing age with exercise. MCME is effective mouth-opening exercise in patients with a history of short duration of locking. In conclusion, age and duration of locking, it must become the important factor predict an effect MCME.

Reliability of Measurements of the Occlusal Contact Area Obtained with an Occlusal Examination Device.

目的: 感圧シートを用いる咬合検査機器による咬頭嵌合位における咬合接触面積測定について, 一般化可能性理論を応用し, 測定日数と繰り返し回数を考慮に入れた術者内信頼性を検討すること.方法: 被験者は健常有歯顎者男性10名を選択した. 咬頭嵌合位における歯列全体の咬合接触面積測定はデンタルプレスケール (R) を用いた. 咬みしめ強度は中程度と最大とした.測定日2日を設け, 3回の繰り返し測定を行った. 術者内信頼性の推定には, 測定日数と繰り返し回数を相とする一般化可能性研究を行った. 次に決定研究を行い, 3つの信頼性の指標, 信頼度指数, 測定の標準誤差と探知可能な最小差を算出した. 分析的な目標を信頼度指数0.9以上とした.結果: 両咬みしめ強度において被験者, 測定日数と測定回数のかかわる交互作用が測定誤差に与える影響が大きかった. また信頼性の指標は, 測定1回の単独測定よりも複数日, 複数回から得られる平均値のほうが良好な信頼性を示した. 信頼度指数0.9以上の測定値を得るためには, 中程度咬みしめにおいて測定日数2日, 繰り返し回数3回による6回以上の平均値, 最大咬みしめでは, 測定日数1日, 繰り返し回数3回以上あるいは測定日数2日, 繰り返し回数2回以上の平均値が必要であった.結論: 感圧シートを応用した咬合検査機器の咬合接触面積測定では, 術者内信頼性は測定日数と繰り返し回数を増加させることにより向上する.