Stoll R, Makris P, Stachniss V
Department of Operative Dentistry, Dental School of the Philipps-University of Marburg, Germany.
J Oral Rehabil. 2001 May;28(5):401-6. doi: 10.1046/j.1365-2842.2001.00681.x.
The aim of this study was to determine the marginal adaptation of partial crowns from pure titanium and a gold alloy after two different cementation techniques. Forty freshly extracted human molars were prepared and randomly divided in four groups. Two groups were restored with partial crowns using the gold alloy Degulor M*. In one group, the crowns were fixed on the tooth by using a zinc phosphate cement. In the other group the margins were additionally burnished by using a hand burnisher No. 660. In the other two groups, partial crowns from pure titanium were cemented in the same way. The marginal quality was determined by quantitative margin analysis in the SEM using a replica technique. Partial crowns from a gold alloy showed significantly (P < 0.05) more margin quality A (vertical marginal discrepancy < 50 microm) while partial crowns from pure titanium had significantly (P < 0.05) more margin quality B (vertical marginal discrepancy 50-100 microm) and over-extended margins (quality D). No significant (P < 0.05) difference was found between the conventional cementation technique and the technique with manual burnishing in both material groups.
本研究的目的是确定两种不同粘结技术后纯钛和金合金制作的部分冠的边缘适合性。准备40颗新鲜拔除的人磨牙并随机分为四组。两组用金合金Degulor M*制作部分冠进行修复。一组使用磷酸锌粘固剂将冠固定在牙齿上。另一组使用660号手动抛光器对边缘进行额外抛光。另外两组以相同方式粘结纯钛制作的部分冠。使用复型技术通过扫描电子显微镜（SEM）中的定量边缘分析来确定边缘质量。金合金制作的部分冠显示出显著更多的边缘质量A（垂直边缘差异<50微米）（P<0.05），而纯钛制作的部分冠则有显著更多的边缘质量B（垂直边缘差异50 - 100微米）和边缘过度伸展（质量D）（P<0.05）。在两个材料组中，传统粘结技术和手动抛光技术之间未发现显著差异（P<0.05）。
