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Faculty of Health Sciences

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Subject: search.filters.subject.Wear resistance

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    Dental composite materials: highlighting the problem of wear for posterior restorations
    (South African Dental Association, 2007) Le Roux, Andre Rayne; Lachman, Nirusha
    Manufacturers of dental composites promote their products as having ideal wear resistant characteristics. Evaluation of the problems that persist with wear of dental composites is made. Recommendations for further research involving wear resistance of dental composite materials are provided. This article provides a review of English, peer-reviewed literature involving wear resistance of dental composite materials conducted through ScienceDirect and hand searched data bases between 1994 and 2006.
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    Wear and flexural strength comparisons of alumina/feldspar resin infiltrated dental composites
    (South African Dental Association, 2008) Le Roux, Andre Rayne; Lachman, Nirusha; Walker, Mark; Botha, T.
    Introduction: Incorporating a feldspar chemical bond between alumina filler particles is expected to increase the wear-resistant and flexural strength properties. Aims and Objectives: An investigation was carried out to evaluate the influence of the feldspar chemical bonding between alumina filler particles on wear and flexural strength of experimental alumina/feldspar dental composites. It was hypothesized that wear resistance and flexural strength would be significantly increased with increased feldspar mass. Methods: Alumina was chemically sintered and bonded with 30% and 60% feldspar mass, silanized and infiltrated with UDMA resin to prepare the dental restorative composite material. Results and conclusions: Higher wear-resistant characteristics resulted with increased feldspar mass of up to 60% (p<0.05). Higher flexural strength characteristics resulted as the feldspar mass was increased up to 60% (p>0.05). Feldspar chemical bonding between the alumina particles may improve on the wear-resistance and flexural strength of alumina/ feldspar composites.