Commenced in January 2007
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Edition: International
Paper Count: 30114
Microscopic Analysis of Welded Dental Alloys

Authors: S. Porojan, L. Sandu, F. Topalâ

Abstract:

Microplasma welding is a less expensive alternative to laser welding in dental technology. The aim of the study was to highlight discontinuities present in the microplasma welded joints of dental base metal alloys by visual analysis. Five base metal alloys designated for fixed prostheses manufacture were selected for the experiments. Using these plates, preliminary tests were conducted by microplasma welding in butt joint configuration, without filler material, bilaterally and with filler material, proper for each base metal. Macroscopic visual inspection was performed to assess carefully the irregularities in the welds. Electron microscopy allowed detection of discontinuities that are not visible to the eye and revealing details regarding location, trajectory, morphology and size of discontinuities. Supplementing visual control with microscopic analysis allows to detect small discontinuities, which escapes the macroscopic control and to make a detailed study of the weld.

Keywords: base metal alloys, fixed prosthodontics, microplasmawelding, visual inspection

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1335392

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References:


[1] L. Jeffus, Welding: Principles and applications, 6th edition. Thomson Delmar Learning, New York, 2008.
[2] I. Watanabe, J. Liu, M. Atsuta, "Effects of heat treatments on mechanical strength of laser-welded equi-atomic AuCu-6at%Ga alloy" in J Dent Res, 2001 Sep;80(9):1813-7.
[3] N. Baba, I.Watanabe, "Penetration depth into dental casting alloys by Nd:YAG laser" in J Biomed Mater Res B Appl Biomater, 2005, 72(1):64-8.
[4] M.O. Neumann, J. Lindigkeit, "Mechanische Festigkeit von geschweißten EMF-Legierungen" in Quintessenz Zahntech, 2005, 31(9):966-73.
[5] A. Reichert, "Untersuchung der Schweißnahtqualit├ñten von Laser und Phaser" in Quintessenz Zahntech, 2005, 31(3):264-79.
[6] H.J. Burkhardt, "Ein wirtschaftlicher Weg mit Erfolgschancen - Schweißen mit dem CeHa Phaser MX1" in Quintessenz Zahntech, 2005, 31(2):136-42.