Abstract
Chemically cured composite resins were evaluated by a compression test to detect the difference between dry and wet specimens after storage in deionized water at 37℃. Compressive strength for dry and wet specimens of Adaptic AP, Concise, Clearfil Posterior and P-10 increased during storage in deionized water at 37℃, but showed lower compressive strength than their dry specimens.their wet specimens after storage in deionized water at 37℃. Compressive strength for dry and wet specimens of microfilled composite resin such as Microrest AP, Micro Jar, Silar and Superlux generally increased during storage in deionized water at 37℃ and their wet specimens after storage in deionized water at 37℃ showed slightly higher compressive strength than their dry specimens. Fracture mode for Adaptic AP, Concise and Clearfil Posterior was classified as shear fracture type, for Microrest AP, Micro Jar and Superlux as longitudinal splitting fracture type and for P-10 and Silar as shear and longitudinal splitting fracture-mixed type.
