Effect of temperature and duration of post-cure on in vitro wear and quantity of remaining double bonds of resins containing carboxylic anhydride.
The present study determined the effect of post-cure temperature and duration on in vitro wear resistance and quantity of remaining double bonds of anhydride-containing resins. Temperatures were varied between 37 degrees C and 225 degrees C, and durations were varied between 0 and 24 h. The quantity of remaining double bonds could not be established for post-cure temperatures of 200 degrees C or more due to melting of the polymer. A temperature of approximately 120 degrees C had optimal effect on wear resistance. Quantity of remaining double bonds and wear were found to decrease with increasing duration of post-cure. Low quantities of remaining double bonds were generally associated with low in vitro wear.
Peutzfeldt
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Department of Dental Materials, School of Dentistry, Faculty of Health Sciences, University of Copenhagen, Denmark.
D000178:Acrylamides / Q000737:chemistry; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002245:Carbon Dioxide / Q000737:chemistry*; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003188:Composite Resins / Q000737:chemistry*; D005609:Free Radicals / Q000737:chemistry; D006358:Hot Temperature; D006860:Hydrogen Bonding; D008299:Maleic Anhydrides / Q000737:chemistry; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D011092:Polyethylene Glycols / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D011140:Polyurethanes / Q000737:chemistry; D012117:Resins, Synthetic / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013387:Succinic Anhydrides / Q000737:chemistry; D013499:Surface Properties; D013997:Time Factors
D000178:Acrylamides; D003188:Composite Resins; D005609:Free Radicals; D008299:Maleic Anhydrides; D008689:Methacrylates; D011109:Polymethacrylic Acids; D011140:Polyurethanes; D012117:Resins, Synthetic; D013387:Succinic Anhydrides; C029824:urethane dimethacrylate luting resin; D002245:Carbon Dioxide; C041069:carboxyl radical; C020946:triethylene glycol dimethacrylate; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate; C005044:hydroxyethyl methacrylate; C031801:succinic anhydride; C045985:methacrylamide