Developments in resin-based composites

Abstract

With the phasing down of dental amalgam use in response to the Minamata Convention, it is likely that resin-based composite restoratives will be the dental material of choice for the direct restoration of compromised dentition in the UK, at least for the foreseeable future. The current materials have a finite lifespan, with failures predominately due to either secondary caries or fracture. Consequently, there is considerable in vitro research reported each year with the intention of producing improved materials. This review describes the recent research in materials designed to have low polymerisation shrinkage and increased mechanical properties. Also described is research into materials that are either antimicrobial or are designed to release ions into the surrounding oral environment, with the aim of stimulating remineralisation of the surrounding dental tissues. It is hoped that by describing this recent research, clinicians will be able to gain some understanding of the current research that will potentially lead to new products that they can use to improve patient treatment in the future.

Influence of Modeling Liquids and Universal Adhesives Used as Lubricants on Color Stability and Translucency of Resin-Based Composites

“…Therefore, hypothesis #iii has to be accepted. This finding has a clinical relevance, as the use of lubricants will not affect the restorative material translucency that is pivotal for the esthetic success [27][28][29]. Such a finding is in accordance with Araujo et al [8], who reported a significant change in translucency after a 2 month staining simulation in the oral cavity, with a significantly lower change in opacity for specimens treated with a Universal Adhesive (Adper Universal, 3M ESPE).…”

The germicidal effect, biosafety and mechanical properties of antibacterial resin composite in cavity filling

“…As a result, amalgam has been gradually replaced by composite resin in recent years [ 73 ]. Dental composite resin consists of resin matrix, inorganic filler, and initiator system [ 74 ]. The resin matrix is made up of macromolecular monomers such as Bis-GMA, TEGDMA, UDMA, which polymerize under certain conditions to form a resin matrix that mainly determines the fluidity of the resin [ 75 ].…”

Physico-Mechanical Properties of a Newly Developed Base Material Containing Mineral Trioxide Aggregate

“…Because dentin is exposed on the surface of the cavity after the removal of caries-affected dentin, pulp damage due to extraneous stimuli might occur. Nowadays, with improvements in dentin adhesives [1,2], polymerization rates [3], and light-curing devices [4][5][6], direct restorations using resin-based composites do not require pulp-capping with calcium hydroxide preparations or base application and lining with glass-ionomer cements [7][8][9].…”