These include continuous, fast, soft-start, pulse, and pulse-delay programs. Also, many light-curing options have been introduced. 1 The layering styles that most practitioners use are the incremental and stratified techniques. Technical innovations have been more significant in the realm of light-curing units, devices linked with these materials, and new clinical techniques for the layering and polymerization of resin-based materials used for restoration of posterior teeth. Research has focused on fillers, interfacial surfaces (organic matrix/filler-silane), and on aggregation technology of filler particles. There have not been any major innovations in the organic matrix used, since light-curing materials are all still derived from Bowen’s monomers (bis-GMA) or at least urethane-dimethacrylate (UDMA). As a result, in the last few years, many new materials such as compomers, ormocers, giomers, packable composite resins, flowable resin-based materials, and glass ionomers have been introduced to the market. This material has been enduring much criticism, not by the international scientific literature, but instead by the media, alternative medicine, and the governments of various countries expressing environmental concerns regarding its use and disposal.

Silver amalgam, which has been a material of choice in the treatment of posterior caries for 150 years, has recently experienced a steady decline in use. Despite the effectiveness of preventive treatments, the decreasing DMTF index, and the decreasing demand for prosthetic restorations, restorative dentistry continues to comprise a large portion of the dentist’s daily practice schedule. During the last 10 years many innovative materials and techniques have been introduced for restorative treatment, especially in the area of direct and indirect aesthetic restoration of posterior teeth.

Pvs dental impression