Effect of Discectomy on Dynesys Dynamic Fixation in the Treatment of Lumbar Degenerative Diseases

Table 3

Pfirrmann grading.

Pre	FFU of group A (n)				FFU of group B (n)
	2	3	4	5	2	3	4	5
2	3/11	0/2			0/14	1/1	1/0
3	5/12	7/1	4/0		1/0	5/17	7/3	5/0
4		1/0	4/1	3/0		2/0	6/0	7/0

Pre: preoperative; FFU: final follow-up. Upper adjacent segment data.