“…A total of 68 articles reporting clinical trials aimed at assessing the effectiveness of regenerative therapies in the treatment of mandibular facial or lingual Class II furcation defects were identified (see http://www.joponline.org/doi/suppl/10.1902/jop.2015.130677/suppl_file/130677_suptab4.pdf in online Journal of Periodontology ) 65‐68,70‐72,75,77,78,79‐85,87‐90,93‐99,101‐104,106,107,110‐112,114‐122,124‐139,141‐147 . Thirty‐seven studies compared a non‐regenerative surgical intervention consisting of OFD or CPF (control) with at least one regenerative approach (test) 65‐68,70,71,75,77,78,83,85,87,89,93,94,102,103,107,112,118,120‐122,126,128,129,132‐134,137,138,141‐143,145‐147 . Of these 37 studies, 17 included at least one test group consisting of OFD or CPF plus a barrier membrane alone, 67,68,70,71,78,85,87,89,93,94,107,118,120,122,129,142,145 eight had at least one test group consisting of OFD or CPF + bone graft alone, 65,66,77,103,126,132,133,147 six included at least one test group consisting of OFD or CPF + bone graft in combination with a membrane, 112,129,132,138,143,147 four included at least one test group consisting of OFD or CPF in combination with a bioactive agent alone, 133,135,141,146 and six had at least one test group consisting of OFD or CPF + other regenerative therapies encompassing a variety of grafting materials and chemotherapeutics 75,94,102,121,128,129 .…”