Physical properties of resinous cements: an in vitro study

The now rate capacity, hydrolytic degradation and radiopacity of three resi n-based cements were tested and compared with zinc phosphate cement, when u sed in accordance with the manufacturer's instructions. There are no signif icant differences among the cements with regard to the now rate. The zinc p hosphate cement showed superior hydrolytic degradation compared with the ot her cements tested. The cements presented different radiopacities and the z inc phosphate cement was the most radiopaque. The results suggest that the development of resin-based materials associated with adhesive procedures ca n increase the effectiveness of indirect restorations.