Table 4: Rate of screw loosening in Dynesys dynamic stabilization involving S1.

Screw loosening
(Number of patients)
Rate of loosening value
YesNo

Delta LL ≥042912.1%0.03
Delta LL <06746.1%

Total 1036

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