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Table 5 Comparison of screw pressure after two-level ACDF using CP or zero-profile device ZP

From: Biomechanical effect of endplate defects on the intermediate vertebral bone in consecutive two-level anterior cervical discectomy and fusion: a finite element analysis

Screw

ZP

IM-ZP

CP

IM-CP

C45

C56

C45

C56

-

-

Extension

438.60

646.60

565.30

747.90

236.00

242.10

Flextion

193.20

276.00

328.70

377.60

255.30

267.80

Bending

333.70

369.10

393.20

401.60

262.40

268.70

Axial rotation

376.30

431.40

465.30

581.80

240.00

246.40