8. GTR versus Emdogain: REC at 1 year.

Study	Parallel group/Split mouth	EMD n  mean (SD)	Control n  mean (SD)	Difference n mean (SE)
Pontoriero 1999	P	10  ‐1.3  (0.9)	10  ‐1.8  (0.9)	20  0.50 (0.40)
Silvestri 2000	P	10  ‐0.5 (0.97)	10  ‐0.95 (1.40)	20  0.45 (0.54)
Zucchelli 2002	P	30  ‐1.0 (0.5)	30  ‐1.6 (1.0)	60  0.60 (0.20)
Sanz 2004	P	35  ‐0.6 (0.9)	32  ‐0.7 (0.9)	67  0.1 (0.22)
Crea 2008	P	19  ‐0.6	20  1.0	39  0.6 (0.478)

GTR = guided tissue regeneration
 REC = gingival recession
 SD = standard deviation
 SE = standard error