Histologic comparison of healing following tooth extraction with ridge preservation using two different xenograft protocols.

Background: The objectives of this study are to compare differences in histologic and clinical healing following tooth extraction and ridge preservation using two different xenograft treatment protocols.

Methods: Forty-four patients with a non-molar tooth that required extraction and planned implant placement were randomly allocated into two ridge preservation protocol groups. Protocol 1 used a xenograft material consisting of 90% anorganic bovine bone in combination with 10% porcine collagen fibers combined with a resorbable bilayer membrane composed of non-cross-linked porcine types I and III collagen.