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Interactions between Oral Bacteria and Antibacterial Polymer-Based Restorative Materials
Published in Mary Anne S. Melo, Designing Bioactive Polymeric Materials for Restorative Dentistry, 2020
Fernando L. Esteban Florez, Sharukh S. Khajotia
Polyacid-modified composite resins, also known as compomers, were produced in an attempt to develop a material displaying the fluoride-releasing capabilities of traditional GICs[137] associated with the esthetics and mechanical properties of resin composites.[138] These materials are composed of acid-functional monomers (di-ester of 2-hydroxyethyl methacrylate with butane tetracarboxylic acid),[139] inorganic filler particles, large monomer molecules (BisGMA and UDMA), traditional diluents (TEGDMA), and photoinitiators (camphoroquinone). These materials are typically polymerized through standard free-radical addition polymerization upon visible-light irradiation of appropriate wavelength and photon energy (≈450 nm, 2.76 eV).[140] Their fluoride-releasing properties are attained from the reaction between water (from saliva) and alumina-silicate particles that, through an acid-base reaction,[141,142] makes fluoride ions available for transport from the surface of the reactive inorganic filler particles to areas adjacent to the restoration,[143] thereby displaying a buffering effect when exposed to acidic conditions. Such property is considered clinically relevant because it could reduce the incidence of secondary caries by decreasing the acidity of S. mutans metabolic by-products.
Dental and Maxillofacial Surgery Applications of Polymers
Published in Severian Dumitriu, Valentin Popa, Polymeric Biomaterials, 2020
Compomers are essentially a subset of resin composites, which have been modified by the incorporation of additional monomers with acidic functional groups [28]—for example, the di-ester of 2-hydroxyethyl methacrylate with 1,2,3,4-butanetetracarboxylic acid or a cycloaliphatic dicarboxylic dimethacrylate [29]. These additional monomers comprise less than 10 wt% of the total material. In addition, some reactive glass powder, as used in glass-ionomers, is included. When compomers were introduced they were sometimes wrongly confused with “glass-ionomers” [30].
Three-dimensional finite element analysis of the composite and compomer onlays in primary molars
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2019
Zuhal Kirzioglu, Derya Ceyhan, Fatih Sengul, Ayse Ceren Altun
The longevity of a treated tooth in an asymptomatic and a functional status in the oral cavity is an important criterion for the treatment success. Coronal coverage restorations, such as onlays and stainless steel crowns (SSC), are known to improve the clinical success rate of restoration of extensively damaged primary posterior teeth. Non-metal dental restorations, such as composite resins and compomers, present satisfactory adhesion, esthetics, and mechanical properties, and thus they are commonly used in posterior teeth. The physical and mechanical properties of the compomers are lower than composite resins, but they also have fluoride ion release property. The resin onlay restoration is an esthetic alternative technique to SSC for restoring extensively damaged primary molars. Available studies on this subject are limited to case reports or in vitro studies (Ferreira and Vieira 2008; Villalta et al. 2006; Wada et al. 2011).