2. Classifications

Currently, throughout the world, around forty manufacturers offer their customers no less than 200 dental composites . In the latter, the resinous matrix is undoubtedly the weak link in the final materials. However, it plays a major role in the cohesion of all fillers, making its presence essential. Its proportion in the composites is minimized in favor of the fillers in order, on the one hand, to reduce the thermal expansion coefficient, the polymerization shrinkage and water absorption and on the other hand, to optimize the viscosity...