7. GTR versus Emdogain: PPD at 1 year.

Study	Parallel group/Split mouth	EMD n  mean (SD)	Control n  mean (SD)	Difference n mean (SE)
Pontoriero 1999	P	10  4.2 (1.3)	10  4.7 (1.4)	20  ‐0.50 (0.60)
Silvestri 2000	P	10  4.9 (1.79)	10  5.7 (1.06)	20  ‐0.80 (0.66)
Zucchelli 2002	P	30  5.1 (0.7)	30  6.5 (1.6)	60  ‐1.40 (0.32)
Silvestri 2003	P	49  5.3 (1.9)	49 5.6 (1.5)	98  ‐0.30 (0.35)
Sanz 2004	P	35  3.8 (1.5)	32 3.3 (1.5)	67  0.50 (0.37)
Crea 2008	P	19  3.4	20  3.6	39  ‐0.2 (0.45)

GTR = guided tissue regeneration
 PPD = probing pocket depth
 SD = standard deviation
 SE = standard error