Quaas A C, Yang B, Kern M
Department of Prosthodontics, School of Dentistry, Albert-Ludwigs University, Freiburg, Germany.
Dent Mater. 2007 Apr;23(4):506-12. doi: 10.1016/j.dental.2006.03.008. Epub 2006 Aug 7.
The purpose of this laboratory study was to evaluate the influence of different cleaning methods after saliva contamination and after using a silicone disclosing medium on the resin bond strength to zirconia ceramic. The hypothesis was that the resin-ceramic bond strength and its durability are related to the ceramic surface condition.
Plexiglas tubes filled with composite resin were bonded to air-abraded zirconia ceramic disks using a phosphate monomer containing composite resin. Four surface cleaning methods were used after contaminating the ceramic surface: air abrasion with 50 mum Al(2)O(3) at 2.5 bar pressure for 15s, cleaning with 37% phosphoric acid for 60s once or for 30s twice, or cleaning in 96% isopropanol for 15s. The specimens of the control group were not cleaned after using the silicone disclosing medium. For each combination 16 specimens were bonded in an alignment apparatus. Subgroups of eight bonded specimens were tested for tensile bond strength (TBS) after storage for either 3 or 150 days combined with 37,500 thermal cycles. The statistical analyses were performed with the Kruskal-Wallis test, followed by multiple pair-wise comparisons using the Wilcoxon rank sum test.
The mean TBS ranged from 6.6 to 49.9 MPa after 3 days and from 0 to 19.8 MPa after 150 days. Air abrasion of the ceramic surface provided statistically significantly higher bond strengths than the other cleaning methods after 3 and 150 days. Alcohol cleaning of the ceramic did not provide durable bond strengths over time.
Ceramic cleaning methods after try-in procedures have a significant influence on the resin-ceramic bond strength. Air abrasion of contaminated zirconia ceramic is the most effective.
本实验室研究的目的是评估唾液污染及使用硅酮示踪剂后不同清洁方法对树脂与氧化锆陶瓷结合强度的影响。假设是树脂 - 陶瓷结合强度及其耐久性与陶瓷表面状况有关。
使用含磷酸盐单体的复合树脂将填充有复合树脂的有机玻璃管粘结到经空气磨蚀的氧化锆陶瓷盘上。在陶瓷表面污染后使用四种表面清洁方法：在2.5巴压力下用50μm的Al₂O₃进行15秒的空气磨蚀，用37%磷酸清洗60秒一次或30秒两次，或在96%异丙醇中清洗15秒。对照组的标本在使用硅酮示踪剂后不进行清洁。对于每种组合，将16个标本粘结在对准装置中。将八个粘结标本的亚组在储存3天或150天后结合37500次热循环测试拉伸粘结强度（TBS）。使用Kruskal - Wallis检验进行统计分析，随后使用Wilcoxon秩和检验进行多组两两比较。
3天后平均TBS范围为6.6至49.9MPa，150天后为0至19.8MPa。在3天和150天后，陶瓷表面的空气磨蚀提供的粘结强度在统计学上显著高于其他清洁方法。随着时间的推移，用酒精清洁陶瓷不能提供持久的粘结强度。
试戴程序后的陶瓷清洁方法对树脂 - 陶瓷结合强度有显著影响。对受污染的氧化锆陶瓷进行空气磨蚀是最有效的。
