Gravimetric and spectrophotometric analysis of water sorption in composite restoratives

Forty samples of two composite resin restoratives were prepared to study the water sorption using gravimetric and Spectrophotometric methods. Arco-Dent composite showed significant water sorption value either by weight or volumetric methods. Quayle Dental composite showed insignificant water sorption. The water sorption values and rate of Arco Dent had a direct relation to the time of immersion till the equilibrium state. The recent volumetric as well as the gravimetric methods are valid and give nearly comparable results. The authors advice using double beam Spectrophotometric to study volumetric changes of the materials as a function of water sorption as it is a recent and an accurate method