臼歯部接触面形態の加齢による変化
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概要
- 論文の詳細を見る
The proximal surfaces of the neighboring teeth keep in contact with each other on the contact point. The contact point changes to the contact area due to tooth attrition. In general, proper tooth contacts are the key to success in prosthetic treatment. In this study, the contact area of natural extracted teeth was examined morphologically as well as physico-chemically. Following results were obtained. 1. The contact area increased in area with increasing age, especially before age of 40. 2. Distance of contact area and proximal marginal ridge decreased with increasing age, especially before age of 40. 3. In Vickers' hardness measurements, phosphorous acid etching and an element analysis by the X-ray micro analyzer, physico-chemical character of a contact area surface could be the same as other surfaces of tooth enamel. These results suggest that age of the patient must be considered if the proximal contact area would be reconstructed by prosthetic treatment. In addition, there is little possibility of existence of a special physico-chemical character of the enamel surface of the contact area proposed by Sato et al.
- 九州歯科学会の論文
- 1994-12-25