Brackets bonding failure after in-office bleaching in vivo

B.D.S,; Al-Obiedy, Dr.Amer; M.Sc,; M.Sc,; Ahmed S. Mustafa B.D.S, Dr.; Bahn Gh. Agha B.D.S, Dr.; M.Sc,

	Brackets bonding failure after in-office bleaching in vivo
MUSTANSIRIA DENTAL JOURNAL
Article 1, Volume 7, Issue 1, 2010, Pages 49-56
Authors
; Dr.Amer Al-Obiedy; ; ; Dr. Ahmed S. Mustafa B.D.S; Dr. Bahn Gh. Agha B.D.S;
Abstract
The aim of this in vivo study was to determine the effect of high concentration 35% hydrogen peroxide bleaching agent on metallic brackets bonding failure. Forty patients who received first orthodontic treatment phase, were included in this study. A split mouth technique was used; one arch exposed to in-office bleaching gel containing 35% hydrogen peroxide for 30 minutes, while the unbleached arch served as the control. Patients were divided into four groups: First two groups, the brackets bonded 48 hours after bleaching while the third and fourth groups, brackets bonded 3 weeks after bleaching. The bracket failure was computed using independent T-test. The higher bracket failure occurs in mandibular bleached group 48 hours before bonding (18.33%) while the lowest bracket failure occurs in unbleached groups (1.67 %). Significant differences were showed in bracket failure between the mandibular bleached teeth 3 weeks before bonding and those 48 hours before bonding. Adhesive Remnant Index scores revealed that the majority of failure in bleached teeth occurred in the enamel/resin interface. The 48 hours bleached teeth before bonding significantly had a high bracket failure. We should increase the time lapse between bleaching and bonding procedure more than 3 weeks to improve the bracket bondingstrength.
Keywords
Key Words; bonding; Bracket failure; in vivo

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