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OBJECTIVE The testing method for mode I fracture toughness (GIC) of dental adhesive resins was investigated. METHODS The dental adhesive resins were placed between two Co-Cr alloy plates to make up test specimen, so test specimen had a metal/adhesive resin/metal construction. The category of adhesive resins, the dimensions of test specimen and testing(More)
We investigated how the thickness of an adhesive layer between two Co-Cr alloy plates affected the mode I fracture toughness of dental adhesive resin by varying the type of resin using a double cantilever beam (DCB) test. Two typical adhesive resins (PV and SB) were used. The adhesive layers of the DCB test specimens were 20, 100 and 200 microns thick. The(More)
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