Propriedades da resina acrílica para cad/cam : revisão sistemática e metanálise de estudos in vitro

Abstract

This systematic review and meta-analysis (SRMA) included in vitro studies which compared the pre-polymerized acrylic resin for fabricating CAD/CAM complete dentures (CDs) versus the heat-polymerized acrylic resin for conventional CDs in terms of surface roughness, wettability, hardness and flexural strength. Study selection: The electronic search was performed in the PubMed/MEDLINE, Embase, LILACS and Web of Science databases, without language or date restrictions. Gray literature and manual search tools were also used. The selection of the articles was carried out by two researchers independently, following the predetermined inclusion criteria: in vitro studies testing the CAD/CAM resin with a control group of heat-polymerized resin which evaluated at least one of the four properties in study. Meta-analysis was performed separately for each property, using a random effect model at a significance level of 5%. Results: Of the 914 studies retrieved in the search strategies, 698 were selected for the SRMA. After applying the eligibility criteria, only 17 articles were selected for the qualitative analysis in the systematic review, of these, 14 were included in the quantitative meta-analysis. Conclusions: The CAD/CAM pre-polymerized acrylic resin in blocks has similar properties as compared to heat-polymerized acrylic resin in almost all outcome measures; with the exception of a statistically significant reduction in surface roughness. Therefore, CAD/CAM pre-polymerized acrylic resin can be considered a potential technical alternative to the conventional acrylic resin.