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In the sites with intrabony periodontal component, after flap elevation, the granulation tissue was removed and roots were planned (a). The defect was covered with nonresorbable titanium-reinforced completely inert membrane (dense polytetrafluoroethylene) alone with no bone substitutes (b) and closed with a single-modified internal mattress suture (c). The membrane was removed 6 weeks after surgery (d).
