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Table 4 Positional relationship between the most secure operating center point and the center of upper and lower pedicles at each segment

From: Kambin's triangle-related data based on magnetic resonance neurography and its role in percutaneous transforaminal endoscopic lumbar interbody fusion

Level (side)

AC/AB

CO (mm)

Mean ± SD

95% CI

Mean ± SD

95% CI

L1-L2

Right

0.58 ± 0.04

0.57–0.59

0.37 ± 0.64

0.18–0.57

Left

0.57 ± 0.04

0.56–0.58

0.58 ± 0.69

0.37–0.80

Mean

0.57 ± 0.04

0.56–0.58

0.48 ± 0.67

0.33–0.62

L2-L3

Right

0.60 ± 0.03

0.59–0.61

1.03 ± 0.79

0.79–1.28

Left

0.59 ± 0.03

0.58–0.60

1.37 ± 0.97

1.07–1.67

Mean

0.60 ± 0.03

0.59–0.60

1.20 ± 0.89

1.01–1.40

L3-L4

Right

0.62 ± 0.04

0.60–0.63

2.52 ± 1.04

2.19–2.84

Left

0.61 ± 0.04

0.60–0.62

2.92 ± 0.95

2.62–3.22

Mean

0.62 ± 0.04

0.61–0.62

2.72 ± 1.01

2.50–2.94

L4-L5

Right

0.63 ± 0.04

0.62–0.64

3.64 ± 1.45

3.18–4.09

Left

0.63 ± 0.04

0.62–0.64

3.74 ± 1.50

3.27–4.21

Mean

0.63 ± 0.04

0.62–0.64

3.69 ± 1.47

3.37–4.01

  1. The point “O” represents the most secure operating center during the PETLIF procedure; the point “C” represents the intersection of the horizontal line of the point “O” with the line connecting the center points of the upper and lower pedicles; values of the “AC/AB” are the ratio of the distance from the point “C” to the center point of the upper pedicle to the distance between the center points of the upper and lower pedicles; values of the “CO” are the horizontal distance from the point “O” to the line connecting the center points of the upper and lower pedicles
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Journal of Orthopaedic Surgery and Research

ISSN: 1749-799X