Effect of Chemical Structure and Composition of the Resin Phase on Mechanical Strength and Vinyl Conversion of Amorphous Calcium Phosphate-Based Composites

Published

March 1, 2004

Author(s)

Drago Skrtic, Joseph M. Antonucci, Walter G. McDonough, D W. Liu

Abstract

The mechanical properties of recently developed bioactive, anti-demineralizaing/remineralizing, amorphous calcium phosphate (ACP)-based composites are in need of improvment. The objective of this study was to elucidate the effect of structure and composition of resins on the mechanical strength (biaxial flexure strength, BFS) and the degree of conversion (DC) of composites attained after photo-polymerization. Two series of Bis-GMA/TEGDMA/X (X being a neutral or acidic comonomer) ternary resins were prepared and admixed with a mass fraction of 40 % of zirconia-hybridized ACP. Both unfilled copolymers and their composites were evaluated for the BFS (dry and wet specimens after 2 weeks of immersion in buffered saline) and for DC (after 24 h at 23 degrees C). It was found that for the neutral X monomers no correlation existed between either DC or the hydrophobic/hydrophilic character of the X monomer and the BFS values of the immersed composites.

Citation

Journal of Biomedical Materials Research Part A

Volume

68A

Issue

No. 4

Pub Type

Journals

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Keywords

amorphous calcium phosphate, composite, FTIR microspectroscopy, hybridization, mechanical strength, remi, surface modification

Citation

Skrtic, D. , Antonucci, J. , McDonough, W. and Liu, D. (2004), Effect of Chemical Structure and Composition of the Resin Phase on Mechanical Strength and Vinyl Conversion of Amorphous Calcium Phosphate-Based Composites, Journal of Biomedical Materials Research Part A, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852229 (Accessed October 10, 2025)