MDP对氧化锆陶瓷粘接性能的提高及微渗漏评价

Bonding improvement and micro-leakage evaluation of zirconia to resin via MDP conditioning

目的评价两种包含磷酸酯单体MDP的氧化锆底涂剂结合或不结合喷砂处理对提高氧化锆陶瓷与树脂粘接强度和边缘封闭的影响。方法对比氧化锆陶瓷应用包含MDP的氧化锆底涂剂结合或不结合氧化铝喷砂处理时对树脂的粘接强度。单纯对氧化锆陶瓷进行氧化铝喷砂处理作为阴性对照组。使用亚甲基蓝染色法评价以上不同处理的氧化锆与树脂间的微渗漏情况。结果单纯喷砂处理显示了最低的粘接强度,应用包含MDP的氧化锆底涂剂能够增加氧化锆陶瓷与树脂的粘接强度,在应用底涂剂前进行氧化铝喷砂处理能够进一步增加与树脂的粘接强度。单纯喷砂组显示了最严重的微渗漏,应用包含MDP的底涂剂时,不论是否经过喷砂处理,微渗漏程度均降低。结论喷砂结合氧化锆底涂剂是提高氧化锆陶瓷粘接的较好方法。

Objective To evaluate the resin bonding and micro-leakage of yttria-stablized tetragonal zirconia polycrystal （Y-TZP）with or without alumina sandblasting combined with conditioning with two 10-methacryloyloxydecyl dihydrogen phosphate （MDP） containing zirconia primers.Methods Short-term shear bond strength （SBS） between composite resin and Y-TZP with different surface treatments was tested.Surface treatments of Y-TZP included the following,alumina sandblasting followed by conditioning with any one of the two brands of MDP containing zirconia primers,single conditioning with any one of the two brands of MDP containing zirconia primers,and single alumina sandblasting as the negative control group.Methylene blue staining was carried out to evaluate the microleakage.Results Single alumina sandblasting showed the lowest SBS.Prior to conditioning Y-TZP with MDP containing zirconia primer,alumina sandblasting improved the SBS further.Y-TZP showed single alumina sandblasting had the most serious microleakage.No matter whether sandblasting was performed,application of MDP containing zirconia primers decreased micro-leakage.Conclusions Alumina sandblasting combined with zirconia primers is a preferable means to improve resin bonding of Y-TZP.