Table 1.

Mean and standard deviation (SD) of bone healing in mandibular fractures

Group	No. of rats	Mean±SD	P-value
C1	10	1.9±0.7
S1	10	3.9±0.9	<0.001
P1	10	4.6±0.9
C4	10	6.7±1.06
S4	10	8.5±1.08	0.002
P4	10	8.2±1.03

(C1: control/1 week, S1: sildenafil/1 week, P1: pentoxifylline/1 week, C4: control/4 weeks, S4: sildenafil/4 weeks, P4: pentoxifylline/4 weeks)