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Filler features and their effects on wear and degree of conversion of particulate dental resin composites

Paper ID Volume ID Publish Year Pages File Format Full-Text
12060 776 2005 6 PDF Available
Title
Filler features and their effects on wear and degree of conversion of particulate dental resin composites
Abstract

Based on the incomplete understanding on how filler features influence the wear resistance and monomer conversion of resin composites, this study sought to evaluate whether materials containing different shapes and combinations of size of filler particles would perform similarly in terms of three-body abrasion and degree of conversion. Twelve experimental monomodal, bimodal or trimodal composites containing either spherical or irregular shaped fillers ranging from 100 to 1500 nm were examined. Wear testings were conducted in the OHSU wear machine (n=6n=6) and quantified after 105 cycles using a profilometer. Degree of conversion (DC) was measured by FTIR spectrometry at the surface of the composites (n=6n=6). Data sets were analyzed using one-way Anova and Tukey's test at a significance level of 0.05. Filler size and geometry was found to have a significant effect on wear resistance and DC of composites. At specific sizes and combinations, the presence of small filler particles, either spherical or irregular, may aid in enhancing the wear resistance of composites, whithout compromising the percentage of reacted carbon double bonds.

Keywords
Composite; Microstructure; Abrasion; FTIR
First Page Preview
Filler features and their effects on wear and degree of conversion of particulate dental resin composites
Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 26, Issue 24, August 2005, Pages 4932–4937
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering