RESUMO
The present study was conducted on 14 quadrants from seven solicited patients. After initial phase of plaque control, six different clinical parameters were recorded and scaling and root planning performed. In each of the seven patients two Modified Widman flaps were done. One served as a control and the other as experimental in which irrigation by Tetracycline-Hcl solution 100 mg/ml for 5 minutes was performed. On comparing the two treatment modalities the tetracycline-Hcl root conditioning showed a better improvement in all the clinical parameters tested. Tetracycline irrigation gave less bacterial counts than the control group right after irrigation; however after two weeks the bacterial counts increased again and were insignificantly different in the two groups