Etching enamel for orthodontics with an erbium, chromium:yttrium-scandium-gallium-garnet laser system

To test the shear bond strength, surface characteristics, and fracture mode of brackets that are bonded to enamel etched with an erbium, chromium:yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser operated at different power outputs: 0.5 W, 1 W, and 2 W. Human premolars that had been extracted for o...

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Veröffentlicht in:The Angle orthodontist 2007-01, Vol.77 (1), p.117-124
Hauptverfasser: Basaran, Güvenç, Ozer, Törün, Berk, Nükhet, Hamamci, Orhan
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container_issue 1
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container_title The Angle orthodontist
container_volume 77
creator Basaran, Güvenç
Ozer, Törün
Berk, Nükhet
Hamamci, Orhan
description To test the shear bond strength, surface characteristics, and fracture mode of brackets that are bonded to enamel etched with an erbium, chromium:yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser operated at different power outputs: 0.5 W, 1 W, and 2 W. Human premolars that had been extracted for orthodontic purposes were used. Enamel was etched with an Er,Cr:YSGG laser system operated at one of three power outputs or with orthophosphoric acid. The shear bond strength associated with the 0.5-W laser irradiation was significantly less than the strengths obtained with the other irradiations. Both the 1-W and 2-W laser irradiations were capable of etching enamel in the same manner. This finding was confirmed by scanning electron microscopy examination. The evaluation of adhesive-remnant-index scores demonstrated no statistically significant difference in bond failure site among the groups, except for the 0.5-W laser-etched group. Generally, more adhesive was left on the enamel surface with laser irradiation than with acid etching. The mean shear bond strength and enamel surface etching obtained with an Er,Cr: YSGG laser (operated at 1 W or 2 W for 15 seconds) is comparable to that obtained with acid etching.
doi_str_mv 10.2319/120605-426R.1
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Human premolars that had been extracted for orthodontic purposes were used. Enamel was etched with an Er,Cr:YSGG laser system operated at one of three power outputs or with orthophosphoric acid. The shear bond strength associated with the 0.5-W laser irradiation was significantly less than the strengths obtained with the other irradiations. Both the 1-W and 2-W laser irradiations were capable of etching enamel in the same manner. This finding was confirmed by scanning electron microscopy examination. The evaluation of adhesive-remnant-index scores demonstrated no statistically significant difference in bond failure site among the groups, except for the 0.5-W laser-etched group. Generally, more adhesive was left on the enamel surface with laser irradiation than with acid etching. 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subjects Analysis of Variance
Bicuspid
Chi-Square Distribution
Chromium
Dental Bonding
Dental Debonding
Dental Enamel
Dental Etching - methods
Dental Stress Analysis
Dentistry
Erbium
Humans
Lasers
Microscopy, Electron, Scanning
Phosphoric Acids
Shear Strength
Surface Properties
title Etching enamel for orthodontics with an erbium, chromium:yttrium-scandium-gallium-garnet laser system
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