Operative characteristics

Frequency

Percentage

Radiographic subsidence

1/60

1.7%

Subsidence per implant level

1/89

1.1%

Subsidence grade per implant level

Grade 0

Grade I

Grade II

Grade III

88

0

1

0

98.9%

0%

1.1%

0%

Number of cages

1

2

3

4

38

17

3

2

63.3%

28.3%

5%

3.3%

Spinal levels

L1/L2

L2/L3

L3/L4

L4/L5

9

13

31

36

10.2%

14.6%

34.8%

40.4%

Supplemental fixation per patient

Pedicle screws

Lateral plate

57

3

95%

5%