An In Vitro Investigation of Mechanical Behaviour in Composite Resin Materials

Both the development of the aesthetic dentistry and a favorable approach towards amalgam resulted in an increasing interest in using the composites in restoration of posterior teeth. The most important factor that limits composites the usage of posterior area is that they do not have enough resistance to wear and mastication strength. Physical properties such as wear; surface hardness and compressive strength are important factors choosing posterior composites. In this study, wear resistance, microhardness profile and compressive strength of three different composite materials offered for using in posterior area were investigated. The results have shown that the 2 most resistance filling material was the Alert. The highest surface hardness values were found for the Valux–Plus. After applying compressive tests to the composite resins, The Valux–Plus material exhibited the highest compressive strength. CLINICAL SIGNIFICANCE Although intensive studies have been carried out so for to produce the most appropriate restorative materials, there are still considerable differences between the mechanical properties and wear hardness of the tooth tissue and composite resins. In addition to that volume fraction of the filler, composition, resin type and polymerisation degree significantly affect the hardness of the restorative materials. For this purpose, in this study was to investigate the mechanical properties and find out a relationship between wear resistance, hardness and compressive strength values of the three types of restorative materials