comparison of adm and connective tissue graft as the membrane in class ii furcation defect regeneration: a randomized clinical trial

background and aims. furcally-involved teeth present unique challenges to the success of periodontal therapy and influence treatment outcomes. this study aimed to assess to compare use of adm and connective tissue membrane in class ii furcation defect regeneration. materials and methods. 10 patient with 2 bilaterally class ii furcation defects in first and/or second maxilla or man-dibular molar without interproximal furcation involvement, were selected. four weeks after initial phase of treatment, be-fore and thorough the surgery pocket depth (pd), clinical attachment level to stent(cal-s), free gingival margin to stent(fgm-s) , crestal bone to stent (crest-s), horizontal defect depth to stent (hdd-s) and vertical defect depth to stent (vdd-s) and crestal bone to defect depth measured from stent margin. thereafter, one side randomly treated using connec-tive tissue and dfdba (study group) and opposite side received adm and dfdba (control group). after 6 months, soft and hard tissue parameters measured again in re-entry. results. both groups presented improvements after therapies (p < 0.05). no inter-group differences were seen in pd re-duction (p = 0.275), cal gain (p = 0.156), free gingival margin (p = 0.146), crest of the bone (p = 0.248), reduction in horizontal defects depth (p = 0.139) and reduction in vertical defects depth (p = 0.149). conclusion. both treatments modalities have potential of regeneration without any adverse effect on healing process. connective tissue grafts did not have significant higher bone fill compared to that of adm.