Materials and Methods: In this, randomized, double-blind, controlled clinical trial 42 patients were allocated to three groups assigned to two weeks rinsing after periodontal surgery with C31G (group A), alcohol-free chlorhexidine 0.12% (group B) or alcohol-based chlorhexidine 0.12% (group C). At weeks 1 and 2, plaque and early wound healing indices were recorded. At day 14, total bacterial counts were estimated utilizing real - time qPCR. Statistics included linear and generalized linear mixed models.