TIEN LUNG YI COMPARATIVE EVALUATION OF SINGLE FLAP APPROACH(SFA) WITH CONVENTIONAL DOUBLE FLAP APPROACH(DFA) FOR THE TREATMENT OF DEEP INTRABONY PERIODONTAL DEFECTS- A RANDOMIZED CONTROLLED DOUBLE BLIND STUDY - PIPARIYA SUMANDEEP VIDYAPEETH 2013-2016 - 54 Subjects--Topical Terms: PERIODONTICS Dewey Class. No.: 617.632