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Measurement of Poisson's ratio of dental composite restorative materials

Paper ID Volume ID Publish Year Pages File Format Full-Text
11745 757 2004 6 PDF Available
Title
Measurement of Poisson's ratio of dental composite restorative materials
Abstract

The aim of this study was to determine the Poisson ratio of resin-based dental composites using a static tensile test method. Materials used in this investigation were from the same manufacturer (3M ESPE) and included microfill (A110), minifill (Z100 and Filtek Z250), polyacid-modified (F2000), and flowable (Filtek Flowable [FF]) composites. The Poisson ratio of the materials were determined after 1 week conditioning in water at 37°C. The tensile test was performed with using a uniaxial testing system at crosshead speed of 0.5 mm/min. Data was analysed using one-way ANOVA/post-hoc Scheffe's test and Pearson's correlation test at significance level of 0.05. Mean Poisson's ratio (n=8) ranged from 0.302 to 0.393. The Poisson ratio of FF was significantly higher than all other composites evaluated, and the Poisson ratio of A110 was higher than Z100, Z250 and F2000. The Poisson ratio is higher for materials with lower filler volume fraction.

Keywords
Poisson's ratio; Dental restorative materials; Composite resins; Elastic properties; Elastic constants
First Page Preview
Measurement of Poisson's ratio of dental composite restorative materials
Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 25, Issue 13, June 2004, Pages 2455–2460
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering