Skip to main content

Table 2 Accuracy measurements of the pedicle screw fixation

From: Robot-assisted orthopedic surgery in the treatment of adult degenerative scoliosis: a preliminary clinical report

Screw grade

RA group (n, [%])

FH group (n, [%])

χ2 = 38.816, p < 0.001

Adjust P value(z test)

A

340 (89.9)

589 (74.9)

< 0.05

B

33 (8.7)

136 (17.3)

< 0.05

C

4 (1.1)

52 (6.6)

< 0.05

D

1 (0.3)

9 (1.1)

 

E

0 (0.0)

0 (0.0)

 

A + B*

373 (98.7)

725 (92.2)

χ2 = 19.780; P< 0.001

  1. Gertzbein-Robbins grading system: grade A screw is completely within the pedicle, grade B pedicle cortical breach < 2 mm, grade C pedicle cortical breach < 4 mm, grade D pedicle cortical breach < 6 mm, grade E pedicle cortical breach > 6 mm
  2. *Means the RA group showed superior accuracy in “clinically acceptable” screws