In vitro comparative analysis of the fit of gold alloy or commercially pure titanium implant-supported prostheses before and after electroerosion

For implant-supported prostheses, passive fit is critical for the success of rehabilitation, especially when alternative materials are used. The purpose of this study was to compare interfacial fit of implant-supported prostheses cast in titanium to those cast in gold alloy. Five 3-unit fixed partia...

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Bibliographic Details
Published in:The Journal of prosthetic dentistry 2004-08, Vol.92 (2), p.132-138
Main Authors: Sartori, Ivete Aparecida de Mattias, Ribeiro, Ricardo Faria, Francischone, Carlos Eduardo, de Mattos, Maria da Gloria Chiarello
Format: Article
Language:English
Subjects:
Analysis of Variance
Dental Abutments
Dental Casting Technique
Dental Implants
Dental Prosthesis, Implant-Supported
Dentistry
Denture Design
Denture, Partial, Fixed
Electrochemistry
Gold Alloys - chemistry
Hot Temperature
Humans
Materials Testing
Surface Properties
Time Factors
Titanium - chemistry
Torque
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Summary:For implant-supported prostheses, passive fit is critical for the success of rehabilitation, especially when alternative materials are used. The purpose of this study was to compare interfacial fit of implant-supported prostheses cast in titanium to those cast in gold alloy. Five 3-unit fixed partial dentures were fabricated in gold alloy (Degudent U) as 1-piece castings, and 5 others were similarly cast in commercially pure titanium (Grade 1). The interfacial gaps between the prostheses and the abutments were evaluated with an optical microscope, before and after electroerosion. Readings were made with both screws tightened (10 N·cm torque), and with only 1 side tightened, so as to also evaluate the passive fit of the prostheses. Data were compared statistically by 2-way analysis of variance and the post hoc Tukey multiple range test (α=.05). Before electroerosion, the interfacial gaps for the 1-piece prostheses were significantly smaller ( P
ISSN:0022-3913
1097-6841
DOI:10.1016/j.prosdent.2004.04.001