Effects of heat and pH in silanation process on flexural properties and hydrolytic durabilities of composite resin after hot water storage.
The objectives of this study were to evaluate the effect of heat application after silanation and the pH effect of silanated solution on flexural properties and hydrolytic durability of experimental composites. A spherical-shaped filler was silanated with 0.66 mass% of gamma-MPTS in 70 vol% ethanol solution. For the heating effect, the filler was heated after silanation for 3 hours at 50 degrees C, 80 degrees C and 110 degrees C. For the effect of pH, ethanol solution with HCl solution of pH 1, 2 and 4 were used. All fillers were mixed to make photopolymerized experimental composite resins. All specimens after immersion in 37 degrees water for 24 hours were additionally immersed in Soxhlet's extractor for another 1, 7 and 28 days. A three-point bending test was performed in 37 degrees C water. The heat application of 50 degrees C and 80 degrees C increased flexural strength while heat of 110 degrees C and pH showed no effects on flexural properties at p<0.05.
Department of Prosthodontics, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand. Mansuang.A@chula.ac.th
Mansuang
M
Arksornnukit
Hidekazu
H
Takahashi
Norihiro
N
Nishiyama
Prasit
P
Pavasant
D003188:Composite Resins / Q000737:chemistry*; D003799:Dental Stress Analysis; D004356:Drug Storage; D004548:Elasticity; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry*; D018583:Pliability; D012821:Silanes / Q000737:chemistry*; D014867:Water
D003188:Composite Resins; D008689:Methacrylates; D012821:Silanes; D014867:Water; C017492:methacryloxypropyltrimethoxysilane