摘要目的 通过研究粘接瓷对纯钛与低熔瓷粉结合强度的影响,探讨粘接瓷影响钛-瓷结合的作用机制.方法 根据ISO 9693中三点弯曲法制作钛试件40个,分为4组,每组10个;分别进行砂纸打磨(B组)、打磨+喷砂(S组)、打磨+表而烧结GC Initial Ti粘接瓷(BG组)和打磨+喷砂+表面烧结粘接瓷(SG组)处理;于4组试件中部烧结低熔瓷粉(Vita Titankeramik).测试钛-瓷结合强度,体视显微镜观察钛-瓷断裂模式,并对钛试件剥脱面进行扫描电镜观察.结果 表面烧结粘接瓷的BG组和SG组的钛-瓷结合强度分别为(32.72±4.46)和(34.25±6.52)MPa,均达到ISO9693的临床标准(＞25 MPa),并显著高于不应用粘接瓷的B组和S组[分别为(20.70±3.15)和(23.92±5.02)MPa,P＜0.05].结论 粘接瓷能有效提高钛-瓷结合强度.

abstractsObjective To investigate the influence of GC Initial Ti Bonder on bend strength between Vita Titankeramik porcelain and titanium.Methods Forty titanium samples were prepared and randomly assigned to 4 groups with 10 samples in each group.Samples in each group were subjected to one of the following surface treatments,burnishing(Group B),sandblasting(Group S),firing GC Initial Ti Bonder after burnishing(Group BG) and firing GC Initial Ti Bonder after sandblasting(Group SG).Vita Titankeramik porcelain were fired on the surface of each sample in the middle.Three-point bending tests were conducted on each sample according to the ISO 9693.The fracture patterns of all specimens were recorded using zoom stereo microscope (ZSM) and the fracture surfaces were observed under scanningelectron microscope (SEM).Results With fired GC Initial Ti Bonder,the bend strength of Vita Titankeramik porcelain to titanium in Group BG and Group SG were (32.72±4.46) and (34.25±6.52) MPa respectively,which reach the ISO 9693 standard for clinical use and were significantly higher than those in Group B [(20.70±3.15) MPa]and Group S [(23.92±5.02) MPa].Conclusions GC Initial Ti Bonder can significantly improve bend strength between Vita Titankeramik porcelain and titanium.