Young H M, Smith C T, Morton D
Department of Operative Dentistry, College of Dentistry, University of Florida, Gainesville, FL 32610, USA.
J Prosthet Dent. 2001 Feb;85(2):129-32. doi: 10.1067/mpr.2001.112797.
Provisional crowns traditionally have been associated with problems such as poor occlusion, contour, fit, and finish. Fabrication procedures should be uncomplicated and predictable within a realistic time frame.
The purpose of this study was to compare the quality of provisional restorations fabricated by dental students from 2 different materials (bis-acryl composite resin and PMMA) and identify the advantages and disadvantages associated with each material.
This study evaluated the occlusion, contour, marginal adaptation, and finish of 222 provisional crowns fabricated by 2 groups (A and B) of dental students. One bis-acryl composite resin material (Integrity) and 2 PMMA resins (C&B Resin and Snap) were evaluated.
For group A, Integrity was statistically superior (P<.05) to C&B Resin in all 4 categories for anterior provisional crowns. For posterior provisional crowns, Integrity proved superior in the categories of contour and marginal adaptation, but no significant differences were established for occlusion and finish. For group B, Integrity was statistically superior to Snap in the categories of occlusion, contour, and marginal adaptation, whereas there was no statistical difference in finish. When all 4 categories were analyzed, Integrity was found to be statistically superior.
Bis-acryl composite resin (Integrity) was significantly superior to PMMA (C&B Resin and Snap) as a provisional restorative material.
传统上，临时冠一直存在诸如咬合不良、外形、贴合度和光洁度等问题。制作程序应简单且在实际时间范围内可预测。
本研究的目的是比较牙科学生用两种不同材料（双丙烯酸复合树脂和聚甲基丙烯酸甲酯）制作的临时修复体的质量，并确定每种材料的优缺点。
本研究评估了两组（A组和B组）牙科学生制作的222个临时冠的咬合、外形、边缘适应性和光洁度。评估了一种双丙烯酸复合树脂材料（Integrity）和两种聚甲基丙烯酸甲酯树脂（C&B树脂和Snap）。
对于A组，在前牙临时冠的所有四个类别中，Integrity在统计学上优于C&B树脂（P<0.05）。对于后牙临时冠，Integrity在外形和边缘适应性类别中表现更优，但在咬合和光洁度方面未发现显著差异。对于B组，在咬合、外形和边缘适应性类别中，Integrity在统计学上优于Snap，而在光洁度方面没有统计学差异。当对所有四个类别进行分析时，发现Integrity在统计学上更优。
作为临时修复材料，双丙烯酸复合树脂（Integrity）明显优于聚甲基丙烯酸甲酯（C&B树脂和Snap）。
