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

• Main Authors: Khudair A AL-Jumaili (Author), Omar Kh.M. Thiab (Author)
• Format: Book
• Published: University of Mosul, College of Dentistry, 2011-04-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.
• Notes: 10.33899/rden.2011.9098; 1812-1217; 1998-0345
• Keywords: bleaching; bracket; bonding; shear bond.; Dentistry; RK1-715
• Source: Al-Rafidain Dental Journal, Vol 11, Iss 2, Pp 260-264 (2011)

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 orthodontic brackets (ROTH, slot size 0.018 inch). The shear bond strength was measured by using the unconfined 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.