Influence of filler loading on the two-body wear of a dental composite.

Abstract:

:The purpose of the study was to explore the fundamental wear behaviour of a dental composite with different filler loadings under two-body wear conditions. The parent resin and filler components were mixed according to different weight ratios to produce experimental composites with filler loadings ranging from 20 to 87.5% by weight. A two-body wear test was conducted on the experimental composites using a wear-testing machine. The machine was designed to simulate the impact of the direct cyclic masticatory loading that occurs in the occlusal contact area in vivo. The results showed that there was little increase in the rate of wear with filler loadings below 60 wt%, but a sharp increase between 80 and 87.5 wt% in filler loading. Wide striations and bulk loss of material were apparent on the wear surfaces at higher filler loadings. Coefficients of friction increased with filler loading and followed the increase in rate of wear loss closely. It was concluded that, under two-body wear conditions, addition of high levels of filler particles into the resin matrix could reduce the wear resistance of dental composites. This finding may help when designing future dental composites for use in particular clinical settings.

journal_name

J Oral Rehabil

authors

Hu X,Marquis PM,Shortall AC

doi

10.1046/j.1365-2842.2003.01068.x

keywords:

subject

Has Abstract

pub_date

2003-07-01 00:00:00

pages

729-37

issue

7

eissn

0305-182X

issn

1365-2842

pii

1068

journal_volume

30

pub_type

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