Effect of dentin surface roughness on shear bond strength

The aim of this investigation was to evaluate the effect of dentin surface roughness on the shear bond strength of a dentin bonding agent. Seventy-five dentin samples were divided into five surface preparation groups: (1) 60-grit SiC; (2) 320-grit SiC; (3) 600-grit SiC; (4) 600-grit SiC followed by...

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Veröffentlicht in:Dental materials 1990-07, Vol.6 (3), p.204-207
Hauptverfasser: McInnes, P.M., Wendt, S.L., Retief, D.H., Weinberg, R.
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container_end_page 207
container_issue 3
container_start_page 204
container_title Dental materials
container_volume 6
creator McInnes, P.M.
Wendt, S.L.
Retief, D.H.
Weinberg, R.
description The aim of this investigation was to evaluate the effect of dentin surface roughness on the shear bond strength of a dentin bonding agent. Seventy-five dentin samples were divided into five surface preparation groups: (1) 60-grit SiC; (2) 320-grit SiC; (3) 600-grit SiC; (4) 600-grit SiC followed by Al 2O 3; and (5) 320-grit SiC followed by a #245 carbide bur. The prepared dentin was treated with a dentin primer, and one coat of dentin bonding agent was applied and light-cured for 30 s. Each dentin specimen was mounted in a device with a split Teflon mold (I.D. = 3.5 mm, depth = 5.0 mm). Three increments of a restorative composite were placed, compressed firmly, and light-cured for 30 s in the mold. After 24 h of storage, the bonds were stressed to failure in a mechanical testing machine at a cross-head speed of 0.5 mm/min. Weibull analysis was used to obtain a shape factor and characteristic level for each group. The results showed that, with the possible exception of the 600-grit SiC and Al 2O 3 group, the grit size used for preparation of dentin specimens for shear bond strength testing in this study did not significantly affect bond strength.
doi_str_mv 10.1016/0109-5641(90)90031-9
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subjects Dental Bonding
Dental Cavity Preparation
Dental Stress Analysis
Dentin
Dentistry
Humans
Surface Properties
title Effect of dentin surface roughness on shear bond strength
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