Łagocka R1, Jakubowska K2, Chlubek D2, Buczkowska-Radlińska J3.
Author information:
1Department of Conservative Dentistry, Pomeranian Medical University, Szczecin, Poland. Electronic address: rytalagocka@gmail.com.
2Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Szczecin, Poland.
3Department of Conservative Dentistry, Pomeranian Medical University, Szczecin, Poland.
Abstract
PURPOSE:
The study evaluates the dynamics of unreacted TEGDMA monomer elution from new generation of flowable bulk fill composite resin (SDR™ Dentsply).
MATERIAL AND METHODS:
Polymerised specimens of SDR™ composite (7mm diameter and 4mm thick) were placed in four solutions: 100% ethanol, 75% ethanol, distilled water and 100% methanol. The concentration of the eluted TEGDMA was measured using the HLPC method after 0.5, 1, 2 and 3h as well as after 1, 3, 7, 14, 21 and 31 days.
RESULTS:
During the first 24h of storage in each medium, a significant elution of TEGDMA was observed (100% ethanol – 12.5μg/g, 75% ethanol – 8.4μg/g, distilled water – 5.4μg/g and 100% methanol – 7μg/g). The elution time of the TEGDMA into 100% ethanol, 75% ethanol, distilled water and 100% methanol was 14, 7, 3 and 1 day, respectively. After 31 days, total concentrations of TEGDMA were as follows: 100% ethanol – 16μg/g, 75% ethanol – 9.4μg/g, distilled water – 6μg/g and 100% methanol – 7μg/g.
CONCLUSIONS:
The TEGDMA was released from the SDR™ composite into each solution used. The TEGDMA concentration and the time of its elution depend on the type of the solvent. In an aqueous environment, the SDR™ composite exhibits a high chemical stability compared to other solutions. The direct toxicity towards to the dental pulp is established during the first hours after the placement of resin.
Copyright © 2015 Medical University of Bialystok. Published by Elsevier Urban & Partner Sp. z o.o. All rights reserved.
PMID: 25837805 [PubMed – indexed for MEDLINE] 1. Adv Med Sci. 2015 Sep;60(2):191-8. doi: 10.1016/j.advms.2015.02.003. Epub 2015 Feb 26.