唾液污染对氧化锆陶瓷粘结影响的研究

Effect of saliva contamination on resin bonding to zirconia ceramic

目的:研究唾液污染对氧化锆陶瓷粘结的影响,以及有效清除污染的方法。方法:Al2O3颗粒喷砂处理的氧化锆陶瓷盘状标本40个,分成5组,每组8个,1组标本不经唾液浸润作为对照组,其余4组标本进行唾液浸润后,分别用75%乙醇冲洗、37%磷酸冲洗、水冲洗和喷砂的清洁方法处理,用X-射线电子光谱对各组标本进行表面化学分析,然后将复合树脂小柱与各组陶瓷盘状标本用含有磷酸盐单体的树脂类粘结剂粘结,在水中浸泡3d以后,测量其拉伸强度(TBS)。结果:与对照组相比,磷酸组和喷砂组的唾液污染被有效清除,而乙醇和水不能清除陶瓷表面的唾液污染。结论:在氧化锆陶瓷修复体的试戴过程中,唾液污染显著地降低了氧化锆陶瓷与树脂类粘结剂粘结的拉伸强度(TBS),而进行喷砂处理是最有效的去除唾液污染的方法。

Objective： This study was to investigate the influences of saliva contamination and cleaning methods on resin bonding to dental zirconia ceramic. Methods： 40 zirconium oxide ceramics discoid specimens blasting processing with Al2O3 pellet sand, were divided into five groups, each group of 8. Airborne-particle abraded specimens without contaminations （CL） were used as control group, After other 4 group specimen carries on the saliva infiltration, airborne-particle abraded ceramic specimens were cleaned with 75% alcohol （AL）, 37% phosphoric acid （PA）, additional airborne-particle abrasion （AA）, or only with water rinsing （SS）, For chemical analysis specimens of all groups were examined with X-ray photoelectron spectroscopy （XPS）. Plexiglas tubes filled with composite resin were bonded to ceramic disk specimens. After 3-day water storage, tensile bond strengths （TBS） were tested. Results： Airborne-particle abrasion and phosphoric acid cleaning removed saliva contamination from ceramic surfaces. Acetone and water rinsing did not remove contamination. Conclusion： Saliva contamination significantly reduced bond strengths to zirconia ceramic. Airborne-particle abrasion was the most effective cleaning method.