Pang I C, Gilbert J L, Chai J, Lautenschlager E P
Department of Dentistry, Taichung Veterans General Hospital, Taiwan.
J Prosthet Dent. 1995 Jan;73(1):17-25. doi: 10.1016/s0022-3913(05)80267-7.
This study compared bond strengths among palladium-copper alloy/VMK 68 porcelain, cast titanium/Duceratin porcelain, and machine-milled titanium/Procera porcelain combinations and investigated the mode of bond failure of these combinations. The effect of multiple firings on the bond strength of porcelain bonded to machine-milled pure titanium was then examined. A uniform thickness of 1 mm of porcelain was applied along an 8 mm length in the central portion of metal specimens measured 25 x 3 x 0.5 mm. The specimens were subjected to a three-point bending test on a load-testing machine with a span distance of 20 mm, and the load of bond failure was recorded and statistically analyzed. Two completely debonded specimens and two longitudinally sectioned specimens of each group were studied with a scanning electron microscope to determine the mode of bond failure. The bond strength of Pd-Cu/VMK 68 porcelain was significantly greater than two titanium/porcelain combinations. There was no significant difference in the bond strengths of porcelain bonded to machine-milled pure titanium among the five porcelain firing schedules.
本研究比较了钯铜合金/VMK 68瓷、铸造钛/Duceratin瓷以及机械研磨钛/Procera瓷组合之间的粘结强度，并研究了这些组合的粘结失效模式。随后考察了多次烧制对粘结在机械研磨纯钛上的瓷的粘结强度的影响。在尺寸为25×3×0.5 mm的金属试样中央部分，沿8 mm长度施加1 mm均匀厚度的瓷。试样在跨度为20 mm的负载试验机上进行三点弯曲试验，记录粘结失效的负载并进行统计分析。每组选取两个完全脱粘的试样和两个纵向剖切的试样，用扫描电子显微镜研究以确定粘结失效模式。钯铜合金/VMK 68瓷的粘结强度显著高于两种钛/瓷组合。在五种瓷烧制程序中，粘结在机械研磨纯钛上的瓷的粘结强度没有显著差异。
