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An in vitro investigation of the wear of enamel on porcelain and gold in saliva

Authors
Journal
Journal of Prosthetic Dentistry
0022-3913
Publisher
Elsevier - Mosby
Publication Date
Volume
75
Issue
1
Identifiers
DOI: 10.1016/s0022-3913(96)90412-6
Keywords
  • Cinical Science Fixed Prosthodontics And Operative Dentistry

Abstract

Abstract This study compared enamel wear against low-fusing porcelain (Procera All-Ceramic) with the wear against feldspathic porcelain (Ceramco) and gold alloy (Olympia). Human enamel abraders were polished to a 3 μm variance on silicon carbide paper. Five enamel abraders were abraded against five disks that were fabricated from (1) gold alloy polished to 1 μm variance, (2) autoglazed feldspathic porcelain, and (3) autoglazed low-fusing porcelain. The enamel sample was tested in human saliva in a wear machine with a constant load of 1 pound during 10,000 rotational cycles. The amount of wear was determined with a stereomicroscope at magnification x64. Significant differences in mean enamel wear were found when abraded against Olympia gold (9 μm), Procera All-Ceramic (60 μm), and Ceramco feldspathic porcelain (230 μm). Significant differences in restorative material wear were found between Olympia gold (0.32 μm) and the porcelain materials, Procera All-Ceramic (4.3 μm) and Ceramco feldspathic porcelain (3.7 μm).

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