de Sá André Tomazini Gomes, de Freitas César Antunes, de Sá Fátima Cristina, Ursi Wagner José Silva, Simões Tânia Christina, de Freitas Márcia Furtado Antunes
Discipline of Restorative Dentistry, Londrina School of Dentistry, State University of Londrina, PR, Brazil.
J Appl Oral Sci. 2008 Jan-Feb;16(1):7-11. doi: 10.1590/s1678-77572008000100003.
The purpose of this study was to evaluate the accuracy of the respective dies after polyether elastomeric procedure in the presence or absence of cervical contact of the acrylic resin shell with the cervical region, establishing a comparison to dies obtained with stock trays. This study consisted of three groups with 10 specimens each: 1) acrylic copings without cervical contact, (cn); 2) acrylic copings with cervical contact (cc); 3) perforated stock tray, (st). The accuracy of the resulting dies was verified with the aid of a master crown, precisely fit to the master steel die. ANOVA test found statistically significant differences among groups (p<0.001). Tukey's test found that the smallest discrepancy occurred in group cn, followed by cc, while the st group presented the highest difference (cc x cn: p=0.007; st x cn: p<0.001; st x cc: p<0.001).
本研究的目的是评估在丙烯酸树脂外壳与颈部区域存在或不存在颈部接触的情况下，聚醚弹性体印模法后各自印模的准确性，并与使用成品托盘获得的印模进行比较。本研究由三组组成，每组10个标本：1）无颈部接触的丙烯酸基底冠（cn）；2）有颈部接触的丙烯酸基底冠（cc）；3）穿孔成品托盘（st）。借助与主钢模精确匹配的主冠来验证所得印模的准确性。方差分析测试发现各组之间存在统计学上的显著差异（p<0.001）。Tukey检验发现，cn组的差异最小，其次是cc组，而st组的差异最大（cc与cn：p=0.007；st与cn：p<0.001；st与cc：p<0.001）。
