硬質レジン前装冠の設計に関する研究 : 第2報下顎小臼歯部のメタルフレームの形態の検討

概要

論文の詳細を見る
The standards for the shape of the metal framework of resin-veneered crowns mentioned in various textbooks seem to be only experiential models. There may be no theory to ensure the safety or durability of crowns. The purpose of the present study is to establish a structural principle for the shape of the metal framework of resin-veneered crowns. Thus, the influence of the differences in shapeof metal frameworks was examined by measuring the strain on several parts of the crowns caused by static pressure. The results of the investigation are as follows : 1. The thick visor is better than the thin one. A thickness of 0.5mm is insufficient for a visor made from 12% Au-Ag-Pd alloy. 2. With regard to the underlying metal, it is more rational to make it thicker from the cervical to the cuspate side. 3. The presence of a metal collar slightly decreases the degree of the elastic transformation of the crown cervical portion. But its usefulness is not yet clearly established.
日本補綴歯科学会の論文
1991-02-01