Immediate versus one-month wet storage fatigue of restorative materials.
Immediate finishing is a highly desirable property of restorative materials. In general, the resin composites, the polyacid-modified resin composites and resin-modified glass-ionomers are finished immediately after light-curing. For the conventional glass-ionomers a waiting period of 24 h is recommended. Therefore, the objective of this study was to investigate whether immediate finishing and application of cyclic loading under water spray on resin-modified glass-ionomers, a conventional glass-ionomer, a polyacid-modified resin composite and a resin composite are reflected in their Young's modulus and fatigue resistance after 1-month wet storage compared with a control group that could mature untroubled for 1 month. From this study, it could be concluded that there is a material-dependent response on immediate finishing. For the conventional glass-ionomer, the waiting period of 24 h is highly advisable. The resin composite suffered more than the other test materials. A second statement is that one must be cautious by the extrapolation of findings obtained on quasi static tests (Young's modulus) towards dynamic properties (flexural fatigue limit).
Gladys
S
S
BIOMAT--Department of Operative Dentistry and Dental Materials, School for Dentistry, Oral Pathology and Maxillo-Facial Surgery, Catholic University of Leuven, Belgium. Sonia.Gladys@med.kuleuven.ac.be
Braem
M
M
Van Meerbeek
B
B
Lambrechts
P
P
Vanherle
G
G
D001672:Biocompatible Materials / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry*; D003793:Dental Restoration, Permanent; D003799:Dental Stress Analysis; D005899:Glass Ionomer Cements / Q000737:chemistry*; D008422:Materials Testing; D018583:Pliability; D014867:Water / Q000737:chemistry
D001672:Biocompatible Materials; D003188:Composite Resins; D005899:Glass Ionomer Cements; D014867:Water