The Effect of Lumbar Lordosis on Screw Loosening in Dynesys Dynamic Stabilization: Four-Year Follow-Up with Computed Tomography

Table 4

Rate of screw loosening in Dynesys dynamic stabilization involving S1.

	Screw loosening; (Number of patients)		Rate of loosening	value
	Yes	No
Delta LL ≥0	4	29	12.1%	0.03
Delta LL <0	6	7	46.1%
Total	10	36

Delta LL (lumbar lordosis) was defined as postoperative LL minus preoperative LL.