Table 2.

Mean reduction and percentage change in relative attachment level (ral) (mm) amongst study groups

PERIOD	GROUP PRF		GROUP T-PRF		UNPAIRED ‘t’ TEST
	MEAN CHANGE	% CHANGE	MEAN CHANGE	% CHANGE	‘t’	‘p’
3 MONTHS	1.90	31.15	1.80	31.58	0.172	0.866
9 MONTHS	2.50	40.98	2.40	42.11	0.176	0.862