Methods: Ninety patients with mandibular buccal class II furcation defects were randomly allocated into three treatment groups: SRP plus placebo gel (group 1), SRP plus 1% ALN gel (group 2) and SRP plus AV gel (group3). Clinical and radiographic parameters were recorded at baseline and gel were delivered at respective site. Then again all clinical and radiographic parameters were recorded after 6 and 12 months from baseline.