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Accuracy Comparison of Implant Impression Techniques: A Systematic Review

Moreira, A. H. J., Rodrigues, N. F., Pinho, A. C. M., Fonseca, J. C. and Vila├ža, J. L. (2015), Accuracy Comparison of Implant Impression Techniques: A Systematic Review. Clinical Implant Dentistry and Related Research. doi: 10.1111/cid.12310

Abstract

Background

Several studies link the seamless fit of implant-supported prosthesis with the accuracy of the dental impression technique obtained during acquisition. In addition, factors such as implant angulation and coping shape contribute to implant misfit.

Purpose

The aim of this study was to identify the most accurate impression technique and factors affecting the impression accuracy.

Material and Methods

A systematic review of peer-reviewed literature was conducted analyzing articles published between 2009 and 2013. The following search terms were used: implant impression, impression accuracy, and implant misfit. A total of 417 articles were identified; 32 were selected for review.

Results

All 32 selected studies refer to in vitro studies. Fourteen articles compare open and closed impression technique, 8 advocate the open technique, and 6 report similar results. Other 14 articles evaluate splinted and non-splinted techniques; all advocating the splinted technique. Polyether material usage was reported in nine; six studies tested vinyl polysiloxane and one study used irreversible hydrocolloid. Eight studies evaluated different copings designs. Intraoral optical devices were compared in four studies.

Conclusions

The most accurate results were achieved with two configurations: (1) the optical intraoral system with powder and (2) the open technique with splinted squared transfer copings, using polyether as impression material.

Marty Jablow DMD - Dental News and Technology

 
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