Study of visible light activated polymerization in BisGMA-TEGDMA monomers with Type 1 and Type 2 photoinitiators using Raman spectroscopy.

Objective: The goal of the study was to characterize the efficiency of polymerization of Type 1 and Type 2 initiators for visible light cure of a BisGMA-TEGDMA monomer mixture.

Methods: Raman spectroscopy was used to follow conversion during polymerization of a BisGMA-TEGDMA mixture using a Type I photoinitiator diphenyl(2,4,6 dimethylbenzoyl)phosphine oxide (TPO) and a Type II photoinitiator camphorquinone (CQ) and an amine, both initiators at 0.5wt.

Silver nanoparticle impregnated poly (ɛ-caprolactone) scaffolds: optimization of antimicrobial and noncytotoxic concentrations.

Use of silver nanoparticles (SNPs) for control of implant-associated infection is a promising strategy, if optimum antimicrobial yet nontoxic dose to mammalian cells is identified. This study was done to determine essential quantity of SNPs, which stimulate antimicrobial activity without cytotoxicity, when immobilized on poly (ɛ-caprolactone) (PCL) scaffold proposed for vascular tissue engineering. During SNP synthesis and scaffold preparation, nanoparticle aggregation was protected using poly (ethylene glycol).