OPTICAL PROPERTIES OF CONVENTIONAL COMPOSITE RESINS COMPARED TO MONOCHROMATIC RESINS: A SYSTEMATIC REVIEW OF RANDOMIZED CLINICAL STUDIES

Abstract

The present work aimed to compare, through a systematic review of randomized clinical studies, the optical properties of monochromatic composite resins in comparison to conventional resins in permanent dentition. The selection of articles was carried out by two researchers independently, in the databases PubMed, Scopus, Web of science, Embase, Cochane and Google Scholar, in addition to a search in the list of references of the selected articles. Initially, articles were selected by title, followed by the summary and finally the full reading of the complete work. 239 articles were selected, after removing duplicates and selection criteria, only 3 articles were included in this review. The articles worked with class IV and class V enamel fractures. The resins used in the articles were different in each study, Admira Fusion X-tra x Admira Fusion; Omnichroma x Tetric-N-Ceram; Universal FiltekX Filtek Z350 XT. One study evaluated color matching, stability and marginal discoloration using the USPHS index (Alpha, Bravo and Charlie). The other evaluated color change using a digital spectrophotometer and the other article used modified USPHS criteria and digital photography. The majority of articles presented a low risk of bias and a high level of scientific evidence. It is concluded that the use of monochromatic resins demonstrated a satisfactory effect similar to that regarding color correspondence and stability when compared with conventional resin in classes V and in enamel fractures in class IV.