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The effects of the curing regime and the composition on the absorption, solubility and the amount of residual monomers of dental flowable composites

S. BOBOIA1, M. MOLDOVAN1,* , A. BURDE2, C. SAROŞI1, I. ARDELEAN3, C. ALB2

Affiliation

  1. ”Babes Bolyai” University - “Raluca Ripan” Chemistry Research Institute, Fântânele 30, Cod 400294, Cluj-Napoca, Romania
  2. “Iuliu Haţieganu” University of Medicine and Pharmacy of Cluj-Napoca, Babeş 8, Cod 400012, Cluj-Napoca, Romania
  3. Technical University - Faculty of Materials and environment engineering, Bd. Muncii 103-105, Cod 400641, Cluj-Napoca, Romania

Abstract

In the present work we investigate 13 samples of dental flowable composites with different ratios of fillers and different amount of polymerization initiator systems. This study summarises the formulation and physico-chemically analysis of such experimental composites, suggesting future work that will drive progress in this area into the future of dental composites research. The water absorption and solubility was determined according with ISO 4049/2000. The amount of residual monomers was determined by implementing two techniques: the high-performance liquid chromatography (HPLC) and the Nuclear Magnetic Resonance (NMR) relaxometry. The comparison of the results provided by the two techniques revealed good agreement. The advantages of NMR relaxometry as compared with HPLC technique are that it allows a faster determination of the residual monomer (6 minutes versus 10 hours), is completely noninvasive and does not require any sample preparation. The samples were investigated by infrared spectroscopy (IR), which provides information about atomic and molecular vibration unit. It is a standard analytical method which can provide information on various chemicals and guidance organization structures. Within the limitations of this experimental study, it was shown that the curing regime, the generic type of material and the ratio between organic and inorganic phase, affect the sorption, the solubility and the amount of residual monomers of dental flowable composites..

Keywords

Flowable composites, Absorption, solubility, Residual monomers.

Submitted at: April 27, 2015
Accepted at: Sept. 9, 2015

Citation

S. BOBOIA, M. MOLDOVAN, A. BURDE, C. SAROŞI, I. ARDELEAN, C. ALB, The effects of the curing regime and the composition on the absorption, solubility and the amount of residual monomers of dental flowable composites, Journal of Optoelectronics and Advanced Materials Vol. 17, Iss. 9-10, pp. 1487-1493 (2015)