Silicon-containing (Si-containing) polishing paste has been tested clinically in patients with chronic generalized periodontitis, I-st degree of severity. All patients have been examined for the presence of supra- and sub-gingival calculus and bleeding on probing on a six- month-testing time and within one year after conducting the professional hygienic procedures. It has been revealed that the proposed Si-containing polishing paste proved to be effective in the maintenance of gingival health in the lapse of time from 1 to 12 months after treatment. The majority of patients showed neither dental deposits nor bleeding on probing up in the interval from 1 to 12 months after dental scaling and polishing with Si-containing polishing paste.