口腔粘膜, 特に総義歯床下粘膜の電気刺激感覚閾に関する研究

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Although much published literatures are available which deals with the sensitivity of normal oral mucous membrane of dentulous persons, there is not yet found any detailed study of sensitivity of mucous membrane under the plate, comparing with that of dentulous persons. In these studies, the author constructed the complete dentures by himself on an edentulous group of 110 patients, on whom the author measured the sensory threshold of mucous membrane under the plate to the electric stimuli. The measurement values thus obtained were comparatively examined with reference to adentulous group of 50 normal subjects. By these comparisons, it was possible to ascertain in detail changes occuring in mucous membrane under the influence of the complete dentures. As a result of these studies, the author arrived at the following conclusions. 1. In common to the edentulous and dentulous groups, the sensory threshold of females was definitely lower than that of males. In the former, the sensitivity of mucous membrane had a slight tendency of being more active. 2. Simillary, in common to the edentulous and dentulous groups, mucous membrane of the lower jaw was observed to have less sensory threshold than that of the upper jaw. On the other hand, the sensitivity of lower jaw mucous membrane was somewhat higher than upper jaw mucous membrane. However, when the mucous sensitivity had been much dulled under the influence of the insertion of complete plates, the lower jaw registered higher sensory threshold. 3. In comparison with normal dentulous subjects, edentulous subjects with complete dentures registered the sensory threshold values which increased in proportion to their age. The dullness of sensitivity to stimuli had advanced also proportionally to their age. In particular, with the edentulous patients in the age from about 60' to over 70's the average sensitivity responsed ecreased by 65 % to 50 % of normal subjects. 4. The sensory threshold values increased proportionally to the applied length with complet dentures and the mucous sensitivity had dulled correspondingly. From 10 to 15 year's of the applied length the averaze sensitivity decreased by 65% and, beyond 15 years, by 65% to 50% of normal subjects. 5. The sensitivity of mucous membrane under the complete dentures was measured invarious regions of jaw as follows. i) Mucous membrane in the molar region was duller than that of the anterior region. However, the decreased rate of sensivity of the mucous membrane under the influence of dentures was much recognized in the anterior region than that of posterior. ii) Order of the degrees of dullness produced under the influence of dentures was labiobuccal, lingual, alveolar ridge, palatal side and palate regions.
社団法人日本補綴歯科学会の論文
1968-07-31

口腔粘膜, 特に総義歯床下粘膜の電気刺激感覚閾に関する研究

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