Table 2J. X-ray improvement of different groups.

group		Pre-treatment			post-treatment
	n	X±S	P	n	X±S	P
BSP	100	3.13±1.06		100	2.81±1.05
>0.05			<0.05
Control	100	3.02±1.37		100	3.18±1.08

I, II stage: 1 point; III stage: 2 point; IV stage: 3 point; V, VI stage: 4 point.