Multiple-unit implant frames: one-piece casting vs. laser welding and brazing

Authors

  • Elza Maria Valadares da Costa Universidade Estadual Paulista; Dental School; Department of Prosthodontics and Dental Materials
  • Maximiliano Piero Neisser Universidade Estadual Paulista; Dental School; Department of Prosthodontics and Dental Materials
  • Marco Antônio Bottino Universidade Estadual Paulista; Dental School; Department of Prosthodontics and Dental Materials

DOI:

https://doi.org/10.1590/S1678-77572004000300013

Keywords:

Implant prosthesis, Endosseous dental implants, Welding

Abstract

The linear distortion of prostheses over implants, one-piece casting and cast in sections followed by laser welding by laser and brazing was evaluated in an edentulous mandibular model with five parallel abutments, with a distance of 10mm from center to center. Seventy five gold cylinders were tightened with screws on the abutments with 10Ncm torque. The cylinder/analogue assemblies were measured by microscopic examination (0.001mm accuracy) and the obtained results were compared with the GC (control group). Fifteen metal frames were waxed and cast in a gold alloy (Stabilor, Degussa Hulls, Brazil) and divided into three groups with five elements each, as followed: GM (one-piece casting), GB (section and brazing) and GL (section and laser welding). In all groups, measurements were taken at the right, left, buccal and lingual sides of the cylinder/analogue interface and the results were submitted to analysis of variance (ANOVA) and to the Tukey test (5%). The smallest amount of distortion was seen in the laser group (GL with a mean value of 13.58), followed by the brazing group (GB with a mean value of 24.33) and one-piece (GM with a mean value of 40.00). The greatest distortion was found in the one-piece group (GM).

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Published

2004-09-01

Issue

Section

Original Articles

How to Cite

Multiple-unit implant frames: one-piece casting vs. laser welding and brazing . (2004). Journal of Applied Oral Science, 12(3), 227-231. https://doi.org/10.1590/S1678-77572004000300013