A novel nano-calcium carbonate-polyurethane-based root canal obturation material: synthesis and evaluation of some physical properties

Abstract

The aim of this study was to prepare a new root canal obturation material named “nano-calcium carbonate-polyurethane” and to evaluate three of its physical properties which are solubility, water sorption and radiopacity.
Polycarbonate 1, 6-hexamethylene diisocyanate, NCO 49.79%, and 1, 4-butanediol were mixed together to form polycarbonate-based  thermoplastic polyurethane (TPU). Additive materials like nano-calcium carbonate powder, zinc oxide, calcium hydroxide and barium sulfate with different ratios were blend together with the polycarbonate-based thermoplastic polyurethane to form the final obturation material.
The nano-calcium carbonate-polyurethane was found to be a promising root canal filling material; the percentages of solubility, water sorption and radiopacity were consistent with ISO standards.