Direct and indirect monomer elution from an RBC product family was written by Durner, Juergen;Schrickel, Klaus;Watts, David C.;Becker, Marc;Draenert, Miriam E.. And the article was included in Dental Materials in 2021.Computed Properties of C20H26O4 This article mentions the following:
To develop a model for quant. comparison of elutable substances by direct elution from resin-bonded composite (RBC) test specimens vs. indirect elutability of substances from RBC-restored teeth. Furthermore, it was to be investigated whether the different composites of the Tetric RBC product family release different types and amounts of substances.Four different composite materials from the Tetric product family were studied. For each material subgroup ten human third molar teeth were prepared with standard Class-I occlusal cavities. These ′tooth group′ specimens were provided with a three-step adhesive system (incorporating TEGDMA) and the resp. composite restoration. Same sized control specimens, of each RBC restorative material, were prepared (′direct RBC′ groups). All specimens were placed in individual elution chambers such that the elution media (ethanol/water, 3:1) only came into contact with either the tooth root or 3/4 height of the ′direct RBC′ materials. They were incubated at 37 °C for up to 7 d. Samples of the eluant were taken after 1, 2, 4 and 7 d and were analyzed by high-temperature gas chromatog./mass spectrometry.Bisphenol A ethoxylate dimethacrylate (bisEMA), bisphenol A glycidyldimethacrylate (bisGMA), tetraethylene glycol dimethacrylate (TEEGDMA), decan-1,10-diol dimethacrylate (DDDMA) were mostly found in the eluates of the ′direct RBC′ groups in statistically significantly greater amounts than in the eluates of the ′tooth groups′. Such quant. differences were also the case with eluates containing bisphenol A (BPA), dicyclohexyl phthalate (DCHP) and drometrizole, which are common in the environment. In contrast to the behavior found with all the other monomers, up to 3 orders of magnitude more triethylene glycol dimethacrylate (TEGDMA) was found in the ′tooth groups′ compared to the ′direct RBC′ groups, evidently released by the adhesive system.The release of most of the substances was clearly delayed in the ′tooth groups′ indicative of their chronic, rather than acute, elution to the oral environment. A barrier function of the residual dentin layer and the adhesion layer can be inferred. The different release patterns of substances from the various composites of the RBC product family is a manifestation of their different and indication-specific compositions Consideration of an overall restorative care (RBC plus adhesive) system, when assessing the total amount of released substances, is emphasized. In the experiment, the researchers used many compounds, for example, Dicyclohexyl phthalate (cas: 84-61-7Computed Properties of C20H26O4).
Dicyclohexyl phthalate (cas: 84-61-7) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Computed Properties of C20H26O4
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics