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Table 3 Radiographic analysis between migrated and non-migrated cages in the PCM group

From: Cage positioning as a risk factor for posterior cage migration following transforaminal lumbar interbody fusion – an analysis of 953 cases

 

Migrated (n = 24)

Non-migrated (n = 24)

P-value

Cage position

 Depth ratio

−0.119 ± 0.063

0.022 ± 0.087

< 0.001

 Coronal ratio

−0.080 ± 0.062

−0.086 ± 0.072

0.978

Preoperative disc radiographic parameter

 DH (mm)

11.43 ± 2.03

8.82 ± 2.53

< 0.001

 ROM (°)

8.40 ± 5.38

6.73 ± 4.48

0.249

 Translation (mm)

3.34 ± 2.45

3.19 ± 2.89

0.845

 Slippage (%)

10.60 ± 10.54

11.23 ± 9.47

0.828

Cage size & geometry

 Cage height (mm)

11.17 ± 0.97

10.42 ± 1.018

0.009

 Height variancea (mm)

−0.26 ± 1.86

1.60 ± 2.65

< 0.001

 Kidney/ Bullet shape

18/6

18/6

1.000

  1. DH indicates disc height, ROM range of motion
  2. a Height variance = cage height – preoperative disc height