HOW CAN PHOTOPOLYMERIZERS AFFECT THE MICROHARDNESS OF COMPOSITE RESIN?
Keywords:Composite resin, Dental Restoration, Light curing, Microhardness, Polymerization
Inadequate photopolymerization of composite resins can cause restoration failures such as marginal microleakage, wear resistance and failures in the hardness of the restorative material. The microhardness of composite resins is extremely important as it affects the mechanical property and can cause premature loss of the restoration. Therefore, this literature review aims to identify the factors that affect the microhardness of composite resins during their polymerization, in order to avoid the failure of restorations. For this purpose, a bibliographic search was performed in the Google Scholar, PubMed and BVS - Virtual Health Library databases using the descriptors: composite resin, photopolymerizer, restoration, polymerization and microhardness. Thus, some factors are important to note, such as: aspects such as intensity and collimation of the light used and its wavelength, the material and technique chosen, the type and quantity of the photoinitiator present in the material and the characteristics of the photopolymerizer. To conclude, it is essential to know the light fixture selected and the properties of the restorative material, to optimize the results, prevent flaws in the material's hardness and thus provide longer-lasting restorations.
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