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  • Title: Wear and flexural strength comparisons of alumina/feldspar resin infiltrated dental composites.
    Author: Le Roux AR, Lachman N, Walker M, Botha T.
    Journal: SADJ; 2008 Nov; 63(10):544, 546-9. PubMed ID: 19322965.
    Abstract:
    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.
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