RESULTS	The most significant results were that gingival recession was greater for the group treated with EMD alone ( 0.8 + / - 0.8 mm ) compared to EMD + BDX ( 0.3 + / - 0.6 mm ) ( P = 0.04 ) and bone fill was greater for EMD + BDX ( 4.0 + / - 0.8 mm ) compared to EMD alone ( 3.1 + / - 1.0 mm ) ( P = 0.02 ) .\