in periodontal pockets as an adjunct procedure to scaling and root planing (SRP). Thirty-
seven sites with probing depth (PD) of 5-7 mm and BANA positive in 6 patients with chronic
periodontal disease were selected. Sites were assigned to different treatment groups
consisting of SRP only (group 1), SRP+ irrigation with collagen gel (group 2), or SRP+
irrigation with collagen gel containing 1% chlorhexidine (group 3). Subgingival irrigation …