重合様式の異なる市販義歯床用レジンの適合精度について

概要

論文の詳細を見る
The purpose of this in vitro study was to compare the dimensional accuracy of maxillary dentures made using a conventional heat-activated PMMA resin, a pour resin, a visiblelight-activated resin, and a microwave-activated acrylic resin. Two simple methods for measuring dimensional accuracy were used : (1) weight of impression material entrapped between the base and master die and (2) measurement of the posterior bordergap at five locations. The volume of space between the denture base and the master die was determined by (1) computation and (2) estimation. Statistical analysis (Bartlett, ANOVA and Tukey's Tests) supported the following conclusions : (1) all groups showed a rrocessinz contraction, most arrarent from buccal flange to buccalflange, (2) the poorest fitting group was processed in a brass flask and a water bath at a temperature which rose from 70 to 100'C, using a heat activated resin (Acron), (3) the visible light activated resin (Triad) produced dentures of intermediate accuracy, as did Acupac 20 when either heat or microwave activated, (4) the two best fitting groups were prepared from a chemically activated resin system using pressure at low heat (PER form), and the resin developed for microwave activation (Acron MC).
日本補綴歯科学会の論文
1989-12-01