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Effect of coupling agents on the local mechanical properties of bioactive dental composites

M. MOLDOVAN1,* , C. PREJMEREAN1, A. COLCERIU1, C. TAMAS1, G. FURTOS1, D. PRODAN1, M. TRIF1, C. ALB2, S. NEAMT2, V. POPESCU3

Affiliation

  1. Raluca Ripan Chemistry Research Institute, 400294 Cluj-Napoca, Romania
  2. Dental Medecine”Iuliu Hatieganu”, University of Medicine and Pharmacy, Cluj-Napoca, Romania
  3. Technical University of Cluj-Napoca, Romania

Abstract

Recent studies have shown that composite resins with non-impregnated filler have a higher probability of elution-in-water and water-uptake than the resins with a silane coupling agent-impregnated filler. This coupling agent may induce an interaction between matrix and filler and it may protect the surface of the filler against elution in water. The purpose of the present study was to evaluate the efficiency of two silane-coupling agents: A171 [3-(trimethoxysilyl) propyl silane] and A- 174 [γ-metacriloyloxypropyl-trymethoxysilane] in creating a different polymer/inorganic surface link, by determining the mechanical properties of the new composites (ISO 4049). The quantity of active double bonds attached to the nanofiller particles surfaces was determined through FTIR spectroscopy of the silane-coupling agent coated on the synthesized powders. A Philips XL 30 SEM scanning electronic microscope was used for the determination of particles morphology. A relative homogeneous microstructure with different particles’ size and shape was observed in the microphotographs in all cases..

Keywords

Dental composites, Mechanical properties, Silane treatment, IR spectroscopy.

Submitted at: March 23, 2007
Accepted at: Nov. 16, 2007

Citation

M. MOLDOVAN, C. PREJMEREAN, A. COLCERIU, C. TAMAS, G. FURTOS, D. PRODAN, M. TRIF, C. ALB, S. NEAMT, V. POPESCU, Effect of coupling agents on the local mechanical properties of bioactive dental composites, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 11, pp. 3415-3418 (2007)