Ｆｕｌｌ ｏｖｅｒｄｅｎｔｕｒｅのそしゃく力，そしゃく力リズムおよびそしゃく力量に関する研究 下がく両側犬歯歯根周囲麻酔下における検討

Abstract

Recently in dental treatment, various considerations apply the function of living tissue are exerted all possible efforts. Especially in prosthetic cases on remaining a few tooth without extraction, overdenture is reconsiderd new merits. It is supported that one of the advantage is the use of mechanoreceptor of periodontal ligament. Though, there is no reports that conclude it enough.Accordingly, observing the effect of the mechanoreceptor of periodontal ligament on the masticatory function in full overdenture used “O'ring” stud attachments on bilateral mandibular canines, the author studies on the masticatory force under anesthesia with “semi-conductor”. As the results of these studies, the author arrived at the following conclusions.1. The masticatory forces under anesthesia were larger than in normal, and there was a tendency that these increase from 1st masticatory period to 4th. The increasing rate was highest in the ham.2. The rhythm of masticatory forces under anesthesia were slower than in normal, and there was a tendency that these increase from 1st masticatory period to 4th. And yet in the ham, such tendency weakened rapidly.3. The integrated amounts of masticatory forces under anesthesia were smaller than in normal.From these studies, it was given a suggestion that under anesthesia the full overdenture wearers masticated more strongly than in normal. Though, the duration was short and the integrated amounts of masticatory forces were little. So, under anesthesia the full overdenture wearers did not masticate efficiently and rhythmically. It is inferred that such reason is the lack of information from the mechanoreceptor of periodontal ligament under anesthesia. Therefore it was estimated the use of remaining the roots in full overdenture.