Flexural strength of pure Ti, Ni-Cr and Co-Cr alloys submitted to Nd:YAG laser or TIG welding

Brazilian Dental Journal

Rick Rocha¹  Antônio Luiz Barbosa Pinheiro¹  Antonio Balbin Villaverde¹ 

[1] ,University of Vale do Paraíba Institute of Research and Development Faculty of Health SciencesSão José dos Campos SP ,Brazil

关键词: laser welding;    tungsten inert gas welding;    Nd:YAG laser;    dental prosthesis;    dentistry;   

DOI  :  10.1590/S0103-64402006000100005

来源: SciELO

【 摘 要 】

Welding of metals and alloys is important to Dentistry for fabrication of dental prostheses. Several methods of soldering metals and alloys are currently used. The purpose of this study was to assess, using the flexural strength testing, the efficacy of two processes Nd:YAG laser and TIG (tungsten inert gas) for welding of pure Ti, Co-Cr and Ni-Cr alloys. Sixty cylindrical specimens were prepared (20 of each material), bisected and welded using different techniques. Four groups were formed (n=15). I: Nd:YAG laser welding; II- Nd:YAG laser welding using a filling material; III- TIG welding and IV (control): no welding (intact specimens). The specimens were tested in flexural strength and the results were analyzed statistically by one-way ANOVA. There was significant differences (p<0.001) among the non-welded materials, the Co-Cr alloy being the most resistant to deflection. Comparing the welding processes, significant differences (p<0.001) where found between TIG and laser welding and also between laser alone and laser plus filling material. In conclusion, TIG welding yielded higher flexural strength means than Nd:YAG laser welding for the tested Ti, Co-Cr and Ni-Cr alloys.

【 授权许可】

CC BY   
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