The influence of temperature on some physical properties of dental composites.
In this study diametral tensile strength and microhardness of composites were investigated in relation to various temperatures during curing. It has been demonstrated that temperatures elevated up to 60 degrees C can improve the mechanical properties considerably. Also the stability of the resin system in aggressive environments was improved due to more efficient cross-linking. Thermal analysis of the material showed an endothermic reaction between 60 and 70 degrees C that is believed to be responsible for the initiation of the extra cross-linking. Heating of composite fillings during clinical use is suggested.
D000180:Acrylic Resins / Q000592:standards; D017438:Bisphenol A-Glycidyl Methacrylate; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003188:Composite Resins / Q000592:standards; D006245:Hardness Tests; D006358:Hot Temperature; D012833:Siloxanes / Q000592:standards; D013718:Tensile Strength
D000180:Acrylic Resins; D003188:Composite Resins; D012833:Siloxanes; D017438:Bisphenol A-Glycidyl Methacrylate; C029638:Vytol; C031759:Isocap; C033930:Silar (3M)