PMID: 22567647May 9, 2012Paper

Are bleaching and desensitizing agents contraindication for patients seeking orthodontic treatment?

Orthodontics : the Art and Practice of Dentofacial Enhancement
Saugat RaySukhbir Singh Chopra

Abstract

To compare in vitro the effects on shear bond strength of the application of a dental bleaching and desensitizer agent prior to bonding metallic orthodontic brackets to extracted human teeth. Sixty therapeutically extracted human premolars without any visible defects were collected and stored in 0.1% thymol solution at room temperature. All teeth were randomly assigned to one of four groups (each n = 15): group I, teeth were treated with bleaching gel containing 10% carbamide peroxide; group II, teeth were treated with a desensitizer containing 26% potassium oxalate; group III, teeth were treated as in group I followed by application of the desensitizer agent as in group II; and group IV, control group. The teeth from all the four groups were then bonded with 0.018-inch Roth premolar brackets. The shear bond strength was tested in a Hounsfield material testing machine. In group I, 10% carbamide peroxide gel alone did not affect the shear bond strength significantly compared with the unbleached specimens in the control group. The use of the desensitizer agent alone in group II significantly reduced the shear bond strength. In group III, further significant reduction of the mean shear bond strength occurred compared with all the ...Continue Reading

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