“…With regard to the combination of resorbable or non‐resorbable membranes with a bone graft for the regeneration of Class II defects, a meta‐analysis was not conducted because only two studies compared these treatment methods. The combined estimate effect, however, indicated favorable results for resorbable membrane with allograft/xenograft 32,35,37,40,44 compared to non‐resorbable membrane with allograft 40,65 (PD vertical reduction [3.05 versus 1.57 mm], CAL vertical gain [2.55 versus 1.38 mm], horizontal bone fill [2.58 versus 2.55 mm], vertical bone fill [2.25 versus 1.15 mm], respectively). The findings of the present study differ from other systematic reviews that showed vertical probing attachment–level enhancement only, by using expanded polytetrafluoroethylene and polymeric barriers 28 …”