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Case 1. a-b), Pre-operative intraoral view of the mandibular left posterior sextant. c-d), Buccal and lingual grade III furcation were defected using Naber's probe to show deep infrabony bone loss. e-f), 1-year post-operative intraoral photograph. g-i), Pre-operative and 6-month, 1-year post-operative periapical radiographs.
