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Table 3 Disc stresses at cephalic adjacent levels

From: Biomechanical analysis of single-level interbody fusion with different internal fixation rod materials: a finite element analysis

Motion

Model

L2-L3

(kPa)

L3-L4

(kPa)

Flexion

INT

880 (100%)

742 (100%)

FUS

1100 (125%)

1150 (155%)

PEEKFUS

1080 (123%)

1140 (154%)

BIOFUS

1070 (122%)

1120 (151%)

CageFUS

1070 (122%)

1110 (150%)

Extension

INT

398 (100%)

424 (100%)

FUS

460 (116%)

525 (124%)

PEEKFUS

460 (116%)

525 (124%)

BIOFUS

460 (116%)

524 (124%)

CageFUS

460 (116%)

524 (124%)

Lateral bending

INT

951 (100%)

906 (100%)

FUS

1030 (108%)

975 (108%)

PEEKFUS

1000 (105%)

955 (105%)

BIOFUS

1000 (105%)

950 (105%)

CageFUS

995 (105%)

941 (104%)

Torsion

INT

314 (100%)

345 (100%)

FUS

316 (101%)

355 (103%)

PEEKFUS

294 (93%)

336 (97%)

BIOFUS

293 (93%)

335 (97%)

CageFUS

286 (91%)

327 (95%)

  1. The percentages indicate the disc stresses of all models normalized by the disc stresses of the INT model