A Novel High-strength GIC System Composed of Poly (Acrylic Acid) With Different Molecular Architectures.
Loading...
Date
2014-05-11
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Aims: The objective of this study was to synthesize and characterize the poly (acrylic
acid) or PAA with different molecular architectures, use these polymers to formulate the
cements with glass fillers, and evaluate the mechanical strengths of the formed cements.
Materials and Methods: The novel poly (acrylic acid)s with different molecular
architectures were synthesized via ATRP technique. The reaction kinetics was studied.
The formed cements were evaluated using compression, diametral compression, and 3-
point bending, fracture toughness, knoop hardness, and wear resistance tests. The
experimental cement was also evaluated for its in vitro biocompatibility.
Results: The results showed that either hyperbranched or star-hyperbranched polymer
synthesis proceeds more slowly at the early stage but accelerates more quickly at the later
stage than the star-shaped polymer synthesis. The higher the arm number and initiator
concentration, the faster the ATRP reaction. It was also found that the higher the arm
number and branching that the polymer had, the lower the viscosity of the polymer
aqueous solution and the lower the mechanical strengths of the formed cement exhibited.
The mechanical strengths of all three experimental glass-ionomer cements were very similar to each other but much higher than those of Fuji II LC. The aging study showed
that all the experimental cements increased their CS continuously during 30 days, unlike
Fuji II LC. This novel cement system was proven to be in vitro biocompatible because it
showed no any noticeable cytotoxicity to human dental pulp cells and mouse 3T3 mouse
fibroblasts.
Description
Keywords
Poly (acrylic acid), light-cured glass-ionomer cement, molecular architecture, viscosity, mechanical strength
Citation
Xie Dong, Zhao Jun, Weng Yiming, Sun Jun. A Novel High-strength GIC System Composed of Poly (Acrylic Acid) With Different Molecular Architectures. British Journal of Medicine and Medical Research. 2014 May; 4(14): 2661-2683.