Becker, W Treatment of mandibular 3-wall intrabony defects by flap debridement and expanded polytetrafluoroethylene barrier membranes. Long-term evaluation of 32 treated patients. [electronic resource] - Journal of periodontology Nov 1993 - 1138-44 p. digital Publication Type: Journal Article ISSN: 0022-3492 Standard No.: 10.1902/jop.1993.64.11s.1138 doi Subjects--Topical Terms: Alveolar Bone Loss--surgeryFollow-Up StudiesGuided Tissue Regeneration, PeriodontalHumansMandibular Diseases--surgeryMembranes, ArtificialPolytetrafluoroethyleneSurgical Flaps