Assessing different patterns of laser welding with Nickel-Chromium (Ni-Cr) alloy for structures applicable to fixed prosthesis

Authors

  • Jarbas Eduardo Martins Associação Paulista de Cirurgiões Dentistas – São Paulo – SP - Brazil
  • Fábio V.R. Bastos Neto Universidade Cruzeiro do Sul –São Paulo – SP – Brazil
  • Danilo Antônio Duarte Faculdade Odontologia da APCD – São Paulo – SP -Brazil
  • Ângela Toshie Araki Universidade Cruzeiro do Sul – São Paulo – SP - Brazil

DOI:

https://doi.org/10.14295/bds.2017.v20i2.1363

Abstract

Among all desired requirements to dental prosthesis, marginal adaptation and passive fit are the most important. In some cases, in order to achieve these goals, it is necessary to cut and weld the teeth / implant-supported framework. Nowadays, the laser welding process shows a great advantage in comparison to other methods. The aim of this study was to evaluate the optimal laser welds point that is more appropriate to Ni-Cr prosthetic framework. A total of 60 specimens of Ni-Cr (35 mm x 4 mm) were designed and welded using a Nd:YAG laser device model EV 900. They were fixed in a metal piece 0.27 mm between the ends to be welded. All specimens were welded with 21 laser pulses diametrically opposed (frequency of 1.0Hz, load time 3.0 ms and 0.5 mm of diameter pulse). They were divided into three groups according to the electric current of the laser weld: A – 180A; B – 200A and C – 220A. To determinate the flexural mechanic strength, all specimens were submitted to a three-point bending test. The results obtained were: Group A = 553 Mpa; B = 751 Mpa and C = 802.1 Mpa. The control group was 1040.9 Mpa. ANOVA and Tukey’s test were performed and statistical significance differences were observed between group A and B as well as between group A and C. However, no significant difference was observed between B and C.

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Published

2017-06-28

How to Cite

1.
Martins JE, Bastos Neto FV, Duarte DA, Araki Ângela T. Assessing different patterns of laser welding with Nickel-Chromium (Ni-Cr) alloy for structures applicable to fixed prosthesis. BDS [Internet]. 2017 Jun. 28 [cited 2025 Aug. 21];20(2):62-9. Available from: https://ojs.ict.unesp.br/index.php/cob/article/view/1363

Issue

Vol. 20 No. 2 (2017): Apr. - Jun. / 2017 - Published Jun 2017

Section

Clinical or Laboratorial Research

License

Brazilian Dental Science uses the Creative Commons (CC-BY 4.0) license, thus preserving the integrity of articles in an open access environment. The journal allows the author to retain publishing rights without restrictions.

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