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Title: Measurement of Poisson's ratio of dental composite restorative materials
Authors: Chung, S.M. 
Yap, A.U.J. 
Koh, W.K.
Tsai, K.T.
Lim, C.T. 
Keywords: Composite resins
Dental restorative materials
Elastic constants
Elastic properties
Poisson's ratio
Issue Date: Jun-2004
Source: Chung, S.M., Yap, A.U.J., Koh, W.K., Tsai, K.T., Lim, C.T. (2004-06). Measurement of Poisson's ratio of dental composite restorative materials. Biomaterials 25 (13) : 2455-2460. ScholarBank@NUS Repository.
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 0.5mm/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. © 2003 Elsevier Ltd. All rights reserved.
Source Title: Biomaterials
ISSN: 01429612
DOI: 10.1016/j.biomaterials.2003.09.029
Appears in Collections:Staff Publications

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