Opdam Niek J M, Roeters Joost J M, van Berghem Edwin, Eijsvogels Edwin, Bronkhorst Ewald
Department of Cariology and Endodontology, University of Nijmegen, The Netherlands.
Am J Dent. 2002 Oct;15(5):317-20.
To detetmine the damage to adjacent tooth surfaces and the quality of the marginal seal of a resin-based composite restoration when a sonic preparation device (Sonicsys) was used to finish the preparation outline.
Three general practitioners prepared 60 Class II box-type cavities in extracted teeth placed in an artificial jaw in a phantom-head. In 30 preparations a bevel was made with a bur, in the other 30 restorations the margins were finished using the sonic preparation device. All preparations were restored with a total-etch technique and a posterior composite (SA primer-Photo Bond-Clearfil PhotoPosterior). Microleakage was tested and the adjacent teeth were inspected for iatrogenic damage.
No statistically significant differences in microleakage were observed between the experimental and control groups. In the control group, 80% of the approximal surfaces of adjacent teeth were damaged while only 30% of the adjacent surfaces were damaged in the experimental group (P < 0.05, Chi-square test).
确定使用声波预备装置（Sonicsys）完成预备外形时，对相邻牙面的损伤以及树脂基复合树脂修复体边缘封闭的质量。
三名全科医生在置于模拟头中人工颌骨内的离体牙上制备60个Ⅱ类盒状洞。在30个预备中用车针制备斜面，在另外30个修复体中使用声波预备装置完成边缘。所有预备均采用全酸蚀技术并用后牙复合树脂（SA底漆 - 光固化粘结剂 - 可乐丽光固化后牙树脂）修复。测试微渗漏情况，并检查相邻牙齿有无医源性损伤。
实验组与对照组之间在微渗漏方面未观察到统计学上的显著差异。在对照组中，相邻牙齿近中面的80%受到损伤，而在实验组中只有30%的相邻面受到损伤（P < 0.05，卡方检验）。
