Effect of Peroxyl mouthrinse on chlorhexidine staining of teeth.

The efficacy of Peroxyl mouthrinse in reducing the extrinsic stain produced by Peridex, a chlorhexidine mouthrinse, was evaluated in a double-blind, three-month clinical study. Intraoral safety, extrinsic tooth stain and plaque accumulation scores were determined on 119 healthy adult subjects at baseline and at 30-, 60- and 90-day intervals following use of Peroxyl or placebo formulations in combination with the Peridex product. Subjects were randomly assigned to two groups. The test group used the chlorhexidine mouthrinse plus Peroxyl mouthrinse, while the control group used the chlorhexidine mouthrinse plus a placebo mouthrinse. All participants were given an oral prophylaxis prior to use of the mouthrinses. The assigned mouthrinse combinations were used by 58 test and 61 control subjects, who followed specific toothbrushing and mouthrinse regimens throughout the three-month period. Both the examiner and the subjects were unaware of the identities of the products tested. Use of Peroxyl mouthrinse significantly reduced extrinsic tooth stain produced by chlorhexidine rinsing. The mean stain scores for all teeth were significantly lower for the Peroxyl/chlorhexidine group, at 60 and 90 days of use, compared to the placebo/chlorhexidine group. At all three time points, the mean stain scores of the anterior teeth of the individuals using Peroxyl/chlorhexidine rinses had significantly less stain compared to the placebo/chlorhexidine rinse group means. No intraoral soft tissue side effects, attributed to product use, were observed or reported throughout the study.