A comparative study of surface characteristics between hydrogen peroxide etching and airborne aluminium oxide particle abrasion on fiber post
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2010-11-03
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Khon Kaen University Dental Journal
Abstract
This study was to compare the effect of different surface treatment of fiber posts with different hydrogen peroxide concentration with various duration and airborne aluminium oxide particle abrasion on the morphological aspects of fiber post surface. Eight fiber posts (Aestheti-Plus; RTD, St. Egreve, France ) were divided into eight groups (one post per group). Group 1 no treatment (control); group 2,3,4 were etching with 24% hydrogen peroxide for 1 minute, 5 minutes, and 10 minutes; group 5,6,7 were etching with 50% hydrogen peroxide for 1 minute, 5 minutes, and 10 minutes; and group 8 were airborne abraded with aluminium oxide particle for 10 seconds. After surface treatment fiber posts were examined with scaning electron microscope to study the surface characteristics. Fiber posts which were treated with 24% hydrogen peroxide for 1 minute, 5 minutes, and 10 minutes and 50% hydrogen peroxide for 1 minute and 5 minutes were comparable in their efficacy to modify the fiber post surfaces. All fiber posts showed rough surfaces along the entire post length, but the underlying epoxy resin remained intact and exhibited no signs of cracking or damage. The exposed quartz fibers were not damaged or fractured by the oxidative reaction of hydrogen peroxide. However, the fiber post surface that were treated with 50% hydrogen peroxide for 10 minutes or airborne aluminium oxide particle abrasion showed severe damage of the underlying epoxy resin and cracking of quartz fiber.
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Khon Kaen University Dental Journal; Vo.13 No. 1 Jan - June 2010