Materiais restauradores temporários resinosos: uma revisão sistemática com meta-análise e estudo in vitro

Abstract

In this study, a systematic review and meta-analysis were performed to analyze the physical properties of temporary resin-based restorative materials when compared to conventional temporary restorative materials. A laboratory study was carried out with the purpose of evaluating the physicochemical properties and the performance of resin-based temporary restorative materials with incorporation of calcium and fluoride ion releasing components. A search in eight databases was performed: MedLine (PubMed), Cochrane, Web the Science, Scopus, Scielo, Lilacs, Bbo and Ibces. Parallel to this, a laboratory study was developed with the objective of evaluating the physical-chemical performance of a temporary experimental resin restorer with different formulations and potential release effect of calcium and fluoride ions. The experimental materials were evaluated for degree of conversion, depth of polymerization, dimensional stability, release of calcium and fluoride ions, cohesive strength, sorption and solubility, and compared to a commercial reference. A total of 23 articles were included in the meta-analysis. The properties evaluated were: microleakage, flexural strength, bond strength, sorption and solubility, diametral tensile strength and compressive strength. Temporary resin-based restorers have shown improved sealing ability and improved physical properties with respect to microleakage and flexural strength than conventional temporary materials. Temporary resin based restorers also showed better results in terms of hardness, sorption and solubility. In the in vitro study, the restorer with calcium hydroxide had a significantly higher degree of conversion than the other groups (92.7% ± 3.3). The polymerization depth (mm) was significantly higher in the resinous experimental group without addition of ions (14.2 ± 3.1). The commercial materials did not present fluoride release, the group containing only fluoride added the base showed release up to 30 days, with greater release between the first and third day (> 10 ppm). As for the release of calcium, the calcium nitrate group showed initial release of calcium of approximately 9 ppm, oscillating and maintaining the release until the 30 days of analysis. For the results of cohesive resistance, the group with calcium hydroxide presented significantly higher results than the others. The lowest surface hardness change (% SHC) was presented by the ERCC group (SHC <75%). There was no statistically significant difference between the other groups regarding% SHC. Regarding the systematic review and meta-analysis, considering the heterogeneity found and the lack of clinical trials and long-term evaluations, further studies are still needed to elucidate whether these restorers are comparable to conventional materials in clinical situations