Clinical evaluation of two different alcohol-free chlorhexidine mouthwashes, with and without an anti-discoloration system. A randomized controlled clinical trial.

Objectives: The aim of this study was to evaluate the efficacy of two alcohol-free, 0.2% chlorhexidine mouthwashes, with and without antidiscoloration systems, following nonsurgical periodontal therapy. Materials and methods: Thirty patients suffering from chronic generalized periodontitis were randomly divided into two groups. After completion of root scaling and planing, the patients in the test group were instructed to use the alcohol-free 0.2% chlorhexidine mouthwash containing an antidiscoloration system, while those of the control group were treated with alcohol-free 0.2% chlorhexidine mouthwash alone. Results: The mouthwash used in the test group caused less discoloration than the one used by controls. Conclusions: Treatment for 2 weeks with alcohol-free 0.2% chlorhexidine mouthwash containing an antidiscoloration system allows good control of mucobacterial plaque without causing tooth discoloration.