Table 1.

Mean DR values of groups

Group	Mean ± SD (MPa)
	2-week (n = 18)	4-week (n = 18)	12-week (n = 18)
TAP	5.19 ± 0.79a,c	4.47 ± 0.67a,b,d	2.98 ± 0.84a
DAP	4.90 ± 0.69a,b,d	4.21 ± 0.76a,b,d	2.94 ± 1.01a
CH	5.64 ± 0.59d	5.59 ± 0.66d	3.53 ± 0.99a
Control	5.70 ± 0.68	5.6 ± 0.51	5.54 ± 0.68

^aSignificant difference with control group

^bSignificant difference with CH group

^cSignificant difference with 4 and 12-week

^dSignificant difference with 12-week