Effect of temperature and duration of post-cure on selected mechanical properties of resin composites containing carboxylic anhydrides.
Resin composites containing carboxylic anhydrides have recently been formulated for use as inlay materials. To optimize the post-cure, the present study measured the effect of post-cure temperature and duration on four mechanical properties of anhydride-containing resin composites. Temperatures were varied between 37 degrees C and 225 degrees C, and durations were varied between 0 and 24 h. An optimum in strength and stiffness was found when post-cure temperatures of 125-150 degrees C were used. Strength and stiffness were found to increase with increasing duration of post-cure. Due to discoloration of the resin composites when post-curing for 6 or 24 h, a post-cure period of 1 h was preferred.
Peutzfeldt
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Department of Dental Materials and Technology, Royal Dental College, Copenhagen, Denmark.
Asmussen
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D000178:Acrylamides / Q000737:chemistry; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D004548:Elasticity; D008299:Maleic Anhydrides / Q000737:chemistry*; D008689:Methacrylates / Q000737:chemistry; D011092:Polyethylene Glycols / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D011140:Polyurethanes / Q000737:chemistry; D013314:Stress, Mechanical; D013387:Succinic Anhydrides / Q000737:chemistry*; D013696:Temperature; D013718:Tensile Strength; D013997:Time Factors
D000178:Acrylamides; D003188:Composite Resins; D008299:Maleic Anhydrides; D008689:Methacrylates; D011109:Polymethacrylic Acids; D011140:Polyurethanes; D013387:Succinic Anhydrides; C029824:urethane dimethacrylate luting resin; C020946:triethylene glycol dimethacrylate; C008384:methacrylic acid; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate; C005044:hydroxyethyl methacrylate; C031801:succinic anhydride; C045985:methacrylamide