Effect of the In-Office Bleaching on the Shear Bond Strength of Orthodontic Brackets.

AL-Jumaili, Khudair A; Thiab, Omar Kh.M.

doi:10.33899/rden.2011.9098

	Effect of the In-Office Bleaching on the Shear Bond Strength of Orthodontic Brackets.
Al-Rafidain Dental Journal
Article 7, Volume 11, Issue 2, 2011, Pages 260-264 PDF (0 K)
Document Type: Research Paper
DOI: 10.33899/rden.2011.9098
Authors
Khudair A AL-Jumaili; Omar Kh.M. Thiab
Abstract
Aims: To evaluate the effect of In-Office enamel vital bleaching with (35% H2O2) and the effect of immersion in artificial saliva following bleaching on the shear bond strength of titanium orthodontic brackets bonded with an orthodontic composite adhesive. Materials and Methods: The samples of the study were categorized into three main groups; bleaching, immersion and control group. Each group was consisted of 10 teeth (Human upper right first premolars). Specimens in bleaching group were bonded immediately after bleaching; immersion group specimens were bleached, then immersed in artificial saliva and held for 1 month before bonding. All specimens were bonded with titanium ortho-dontic brackets (ROTH, slot size 0.018 inch). The shear bond strength was measured by using the un-confined shear testing machine. Results: Bleaching group had the lowest shear bond strength whereas the control group had the highest one. No significant differences were noted between the immersion and control group (at p ≤ 0.05). Conclusions: In-Office enamel bleaching was significantly reduced the shear bond strength of orthodontic brackets. Immersion in artificial saliva (following bleaching) was able to improve the reduced shear bond strength.
Keywords
bleaching; bracket; bonding; shear bond

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