PMID: 9553881Apr 29, 1998Paper

Laser welding of a cobalt-chromium removable partial denture alloy

The Journal of Prosthetic Dentistry
D P NaBadalung, J I Nicholls

Abstract

The electric alloy brazed joints of removable partial denture alloys have failed frequently after routine usage. A technique providing higher joint strengths was investigated. This investigation compared the tensile strengths of electric-brazed and laser-welded joints for a cobalt-chromium removable partial denture alloy. Twenty-four cobalt-chromium standard tensile testing rods were prepared and divided into three groups of eight. All specimens in the control group (group 1) were left in the as-cast condition. Groups 2 and 3 were the test specimens, which were sectioned at the center of the rod. Eight specimens were joined by using electric brazing, and the remaining specimens were joined by using laser welding. After joining, each joint was ground to a uniform diameter, then tested to tensile failure on an Instron universal testing machine. Failure loads were recorded and fracture stress calculated. Statistical analysis was applied. The student-Newman-Keuls test showed a highly significant difference between the joint strengths of the as-cast control specimens, the electric-brazed and laser-welded joints. The tensile strengths of the as-cast joints were higher than those for the laser-welded joints, and both were higher than ...Continue Reading

Citations

Oct 1, 2011·Journal of Oral Science·Hisaji KikuchiTakayuki Yoneyama
Apr 30, 2004·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·N BabaM Atsuta
Dec 12, 2013·Lasers in Medical Science·Youssef S Al JabbariSpiros Zinelis
Feb 28, 2015·The Journal of Advanced Prosthodontics·John KokolisSpiros Zinelis
Aug 3, 2010·Journal of Oral Rehabilitation·L HjalmarssonA Wennerberg
Mar 27, 2012·Dental Materials Journal·Yasuko TakayamaChikahiro Ohkubo
Sep 29, 2009·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Caroline Bertrand, Angeline Poulon-Quintin

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