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Effect of Framework Soldering on the Deformation of Implant Abutments After Framework Seating

2013; Lippincott Williams & Wilkins; Volume: 22; Issue: 2 Linguagem: Inglês

10.1097/id.0b013e31828186e8

1538-2982

Stella de Noronha Campos Mendes, Carlos Eduardo Edwards Rezende, Rafael Tobias Moretti Neto, Edson Antonio Capello Sousa, José Henrique Rubo,

Bone Tissue Engineering Materials

Passive fit has been considered an important requirement for the longevity of implant-supported prostheses. Among the different steps of prostheses construction, casting is a feature that can influence the precision of fit and consequently the uniformity of possible deformation among abutments upon the framework connection.This study aimed at evaluating the deformation of abutments after the connection of frameworks either cast in one piece or after soldering.A master model was used to simulate a human mandible with 5 implants. Ten frameworks were fabricated on cast models and divided into 2 groups. Strain gauges were attached to the mesial and distal sides of the abutments to capture their deformation after the framework's screw retentions were tightened to the abutments.The mean values of deformation were submitted to a 3-way analysis of variance that revealed significant differences between procedures and the abutment side. The results showed that none of the frameworks presented a complete passive fit.The soldering procedure led to a better although uneven distribution of compression strains on the abutments.