不同表面处理方法对氧化锆支架材料与Vitadur alpha瓷结合性能的影响

The bond properties of Vitadur alpha on dental zirconia framework material

目的:研究不同表面处理方法对氧化锆支架材料与Vitaduralpha瓷结合情况的影响,选择适用于临床的表面处理方法。方法:选用Vitaduralpha瓷,通过粉浆涂塑法与成品氧化锆支架材料进行烧结,通过肉眼观察、扫描电镜、能谱分析、热冲击实验等方法,研究其烧结结合情况,测试界面的结合剪切强度,并对结果进行方差分析。结果:氧化锆陶瓷支架材料完全烧结后,与Vitaduralpha瓷能达到良好的烧结效果,能谱分析结果提示两者存在化学结合。不同表面处理方法对Vitaduralpha瓷与氧化锆陶瓷支架材料界面结合剪切强度有影响:其中水砂纸细磨组抗剪切强度(35.1662MPa)最高,机械喷砂组(27.8283MPa)优于未处理组(20.9677MPa),车针粗磨组抗剪切强度(15.3025MPa)最低,各组结果间有显著性差异(P<0.01)。结论:结合临床实际,机械喷砂处理后,Vitaduralpha瓷能够与氧化锆陶瓷支架材料达到良好的匹配。

PURPOSE： To evaluate the bond properties of Vitadur alpha on dental zirconia framework material. METHODS： Vitadur alpha was sintered on the surface of four groups＇ presintered zirconia ceramic plates which were dealt with respective procedures. SEM, energy distribution spectrum and thermal shock test were applied to evaluate the sintering properties of such interfaces. Shear bond strength of Vitadur alpha-zirconia interfaces were measured, and the results were analysed by ANOVA method. RESULTS： Satisfying result was obtained in Vitadur alpha sintered on the zirconia framework material, furthermore, chemical combination between the two laminates were confirmed by means of energy distribution spectrum. The shear bond strength of 3Y-TZP-Vitadur alpha dentin differed under different surface eonditionings： highest shear bond strength appeared in the group conditioned with water sand paper （35.1662MPa）, shear bond strength of the group conditioned with sandblast （27.8283MPa） was better than that of non-conditioning group （20.9677MPa）, diamond condition group had the lowest shear bond strength （15.3025MPa）, significant difference existed between each group （P〈0.01）. CONCLUSION： Further clinical research could be carried out on Vitadur alpha and zireonia eeramic framework under conditioning with sandblast. Supported by National Natural Science Foundation of China （30070820）.