Scanning electron microscopy evaluation of the effect of etching agents on human enamel surface
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Abstract
Acid etching promotes microporosities on enamel surface, which provide a better bonding surface to adhesive materials. The purpose of this study was to comparatively analyze the microstructure of enamel surface after etching with 37% phosphoric acid or with two self-etching primers, Non-rinse conditioner (NRC) and Clearfil SE Bond (CSEB) using scanning electron microscopy. Thirty sound premolars were divided into 3 groups with ten teeth each: Group 1: the buccal surface was etched with 37% phosphoric acid for 15 seconds; Group 2: the buccal surface was etched with NRC for 20 seconds; Group 3: the buccal surface was etched with CSEB for 20 seconds. Teeth from Group 1 were rinsed with water; teeth from all groups were air-dried for 15 seconds. After that, all specimens were processed for scanning electron microscopy and analyzed in a Jeol 6100 SEM. The results showed deeper etching when the enamel surface was etched with 37% phosphoric acid, followed by NRC and CSEB. It is concluded that 37% phosphoric acid is still the best agent for a most effective enamel etching.
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Keywords
Clearfil SE Bond, maleic acid derivative, non rinse conditioner, non-rinse conditioner, phosphoric acid, resin cement, water, adolescent, air, clinical trial, comparative study, controlled clinical trial, controlled study, dental acid etching, drug effect, enamel, female, human, male, methodology, porosity, randomized controlled trial, scanning electron microscopy, time, ultrastructure, Acid Etching, Dental, Adolescent, Air, Dental Enamel, Female, Humans, Male, Maleates, Microscopy, Electron, Scanning, Phosphoric Acids, Porosity, Resin Cements, Time Factors, Water
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English
Citation
Journal of Clinical Pediatric Dentistry, v. 30, n. 3, p. 247-250, 2006.
