Dérand T
Department of Oral Technology, Centre for Oral Health Sciences, University of Lund, Malmö, Sweden.
Dent Mater. 1995 Mar;11(2):93-5. doi: 10.1016/0109-5641(95)80040-9.
The purpose of this investigation was to determine if laser-welding titanium had an effect on the bond strength of porcelain to metal. This is an important consideration since the metal copings for many multi-unit porcelain restorations are fabricated as single units and then either soldered or welded.
The bond strength of porcelain to laser-welded titanium was measured with a four-point bending test and the interface was examined using SEM/EDX analysis.
The result showed no statistically significant differences (p<0.05) in bond strengths between laser-welded surfaces and mechanically machined surfaces and neither were there any alterations in composition identified after the welding. The use of a special bonding agent did not improve the bond strength significantly.
Fusing porcelain to laser-welded areas in titanium fixed restorations implies no deterioration of bond strength.
本研究的目的是确定激光焊接钛对瓷与金属结合强度是否有影响。这是一个重要的考虑因素，因为许多多单位瓷修复体的金属基底冠是作为单个单位制造的，然后进行焊接。
采用四点弯曲试验测量瓷与激光焊接钛的结合强度，并使用扫描电子显微镜/能谱分析（SEM/EDX）检查界面。
结果表明，激光焊接表面与机械加工表面的结合强度无统计学显著差异（p<0.05），焊接后成分也未发现任何变化。使用特殊粘结剂并未显著提高结合强度。
在钛固定修复体中，将瓷熔附于激光焊接区域不会导致结合强度降低。
