Engineering of biomimetic composite dental materials based on nanocrystalline hydroxyapatite and light-curing adhesive

Abstract

With the use of light-curing Bis-GMA (Bis-phenol-А glycidylmethacrylate) adhesive and nanocrystalline carbonatesubstituted calcium hydroxyapatite (nano-сHAp), corresponding by an aggregate set of characteristics to the apatite of human enamel and dentin obtained from the biogenic source of calcium – egg’s shell of birds biomimetic Bis-GMA/nano-сHAp adhesives were synthesized. Introduction and distribution of nano-cHAp filler in the adhesive matrix as well as its interaction with molecular groups of the latter one resulted in the change of chemical bonds that was evidenced by the data of Fourier transform infrared (FTIR) spectroscopy. In summary, for the specified nanofiller concentration increased values of Vicker hardnesses (VH) and degree of conversion were attained simultaneously while light curing of Bis-GMA/nano-cHAp adhesive. This result would provide a considerable influence on the following application of the developed biomimetic adhesives and clinical successes of teeth restoration with the use of these composites

Keywords

• biomimetic strategies
• nanodentology
• calcium hydroxyapatite
• adhesives