Łagocka R1, Jakubowska K2, Chlubek D2, Buczkowska-Radlińska J3.
1Department of Conservative Dentistry, Pomeranian Medical University, Szczecin, Poland. Electronic address: email@example.com.
2Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Szczecin, Poland.
3Department of Conservative Dentistry, Pomeranian Medical University, Szczecin, Poland.
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.
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.
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.