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Table 5 Maximum pars stresses at instrumented levels (left side)

From: Application of an interspinous process device after minimally invasive lumbar decompression could lead to stress redistribution at the pars interarticularis: a finite element analysis

Motion

Model

L3 (MPa)

L4 (MPa)

Flexion

INT

3.39 (100%)

2.60 (100%)

DEF

5.34 (158%)

1.13 (43%)

DIAMUNI

5.08 (150%)

2.24 (86%)

DIAMBIL

5.26 (155%)

2.23 (86%)

Extension

INT

6.52 (100%)

8.17 (100%)

DEF

4.86 (75%)

16.60 (203%)

DIAMUNI

6.19 (95%)

12.10 (148%)

DIAMBIL

6.14 (94%)

13.10 (160%)

Lateral Bending

INT

0.50 (100%)

1.26 (100%)

DEF

0.36 (72%)

1.22 (97%)

DIAMUNI

0.63 (126%)

0.89 (71%)

DIAMBIL

0.60 (120%)

0.89 (71%)

Torsion

INT

10.90 (100%)

9.97 (100%)

DEF

8.94 (82%)

12.20 (122%)

DIAMUNI

9.64 (88%)

13.60 (136%)

DIAMBIL

9.55 (88%)

13.60 (136%)

  1. The percentages indicate the maximum pars stresses of all the models normalized by the corresponding maximum pars stresses of the INT model