Mo Anchun, Cen Yuankun, Liao Yunmao
Department of Dental Implant, West China College of Stomatology, Sichuan University, Chengdu 610041, China.
Hua Xi Kou Qiang Yi Xue Za Zhi. 2003 Apr 20;21(2):104-6.
To determine the influence of different surface conditioning methods on bonding strength of low fusing porcelain (La-Porcelain) and titanium.
The surface of the samples were sandblasted for 2 min with 80-250 microns Al2O3 or coated for two times with Si-couple agent or conditioned by pre-oxidation. The shear bond strength was examined by push-type shear test with a speed of 0.5 mm/min in a universal testing machine. Scanning electron microscopy (SEM) and electron probe micro-analyzer (EPMA) were employed to explore the relationship between bonding strength and microstructures, as well as the element diffusion at the interface between porcelain coating and titanium when heated at 800 degrees C.
Bonding strength was not statistically different (P > 0.05) after sandblasting with Al2O3 in particle size ranged from 80 microns to 250 microns. When a Si-couple agent was used, bond of porcelain to titanium was significantly lower (P < 0.05). The shear bond strength of the porcelain to the pre-oxidized titanium surface remained unchanged after heating (P > 0.05). The SEM results revealed integrity of porcelain and titanium.
La-Porcelain showed a small effect of surface coarseness. Sandblasting the titanium surface with 150-180 microns Al2O3 can be recommended as a method for better bonding between La-Porcelain and titanium. The Si-couple agent coating and pre-oxidation of titanium surface is unnecessary.
确定不同表面处理方法对低熔烤瓷（镧系烤瓷）与钛结合强度的影响。
用80 - 250微米的Al2O3对样品表面喷砂2分钟，或用硅偶联剂涂覆两次，或进行预氧化处理。在万能试验机中以0.5毫米/分钟的速度通过推式剪切试验检测剪切结合强度。采用扫描电子显微镜（SEM）和电子探针微分析仪（EPMA）来探究结合强度与微观结构之间的关系，以及在800℃加热时烤瓷涂层与钛界面处的元素扩散情况。
用粒径范围为80微米至250微米的Al2O3喷砂后，结合强度无统计学差异（P > 0.05）。使用硅偶联剂时，烤瓷与钛的结合力显著降低（P < 0.05）。加热后，烤瓷与预氧化钛表面的剪切结合强度保持不变（P > 0.05）。SEM结果显示烤瓷与钛的完整性。
镧系烤瓷受表面粗糙度影响较小。推荐用150 - 180微米的Al2O3喷砂钛表面，作为镧系烤瓷与钛更好结合的一种方法。无需对钛表面进行硅偶联剂涂覆和预氧化处理。
