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The characterization of some new dental composites

A. COLCERIU1,* , T. BURUIANA2, M. MOLDOVAN1, C. PREJMEREAN1, C. TAMAS1, O. FODOR3, L. OPREAN4, V. POPESCU5

Affiliation

  1. “Raluca Ripan” Chemistry Research Institute, Cluj-Napoca, Romania
  2. “Petru Poni” Institute of Macromolecular Chemistry, Iasi, Romania
  3. Faculty of Medicine and Pharmacy, Oradea University, Romania
  4. Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
  5. The Technical University Cluj-Napoca, Romania

Abstract

Behind the recent studies, the researchers’ attention in the field was focused upon the fillers-polymeric matrix interface instabilities, which may lead to a rapid erosion of the composites. Till now, doesn’t exist clinical studies, which confirm these assumptions. We may specify that the filler-matrix bond is the most important for a composite with adequate properties and from this point of view is easy to justify why a filler-matrix bond unbinding could be the first failure mechanism which may be take into consideration for the composites wear and fracture. This fracture may be realized at the filler-matrix interface, filler surface, filler-silane interface or at the silane-resin interface. The purpose of this study is to evaluate the diametric tensile strength of five experimental dental composites and to acquire a SEM analysis of the intact and fractured dental composites’ surface. The diametrical tensile strength was measured with the aid of a universal INSTRON type-testing machine from the LOYD Company, at 23 0C. The analysis of the intact and fractured dental composites surface was evaluated using a scanning electronic microscope, Philips XL 30 ESEM. We studied the relationships between the diametric tensile strength and the composites morphology and composition. A significant contribution in order to obtain better values for the diametric tensile strengths has SiO2 contained in the fillers composition.

Keywords

SEM, Diametric tensile strength, Polymeric composites.

Citation

A. COLCERIU, T. BURUIANA, M. MOLDOVAN, C. PREJMEREAN, C. TAMAS, O. FODOR, L. OPREAN, V. POPESCU, The characterization of some new dental composites, Optoelectronics and Advanced Materials - Rapid Communications, 1, 5, May 2007, pp.231-234 (2007).

Submitted at: April 4, 2007

Accepted at: April 5, 2007