... role in the regulation of proliferation, migration, and differ-entiation of the epithelial cells [2,12,18,19]. Following the surgical treatment of adult periodontitis, the epithelial regeneration ... i.e. the position of the gin-gival margin with respect to the cement enamel junction (CEJ); • CAL (clinical attachment level): i.e. the position of the attachment in relationship to the CEJ; ... gingivitis grade of 0 or 1. Thanks to the bacteriostatic properties of the tested polymer, a more effective control of the surgical wound no bacterial contamina-tion of the surgical site...