RIDGE PRESERVATION COMPARING THE CLINICAL AND HISTOLOGIC HEALING OF AN INTRASOCKET ALLOGRAFT VS. A FACIAL OVERLAY XENOGRAFT USING A BIORESORBABLE BARRIER MEMBRANE Evmenios Poulias, DDS September 17th, 2012 Aim. The efficacy of ridge preservation procedures using grafting materials and barrier membranes has been well established in the literature. However, the loss of horizontal width even with ...