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Table 3 Radiographic measurements of medial and lateral JL difference with flexion and rotation error

From: 3D-surface scan based validated new measurement technique of femoral joint line reconstruction in total knee arthroplasty

Flexion and rotation error

Medial JL difference (mm)

Lateral JL difference (mm)

0° flexion (reference)

-2.2 (± 0.1)

-0.4 (± 0.3)

 + 5° internal rotation

-2.5 (± 0.2)

0.1 (± 0.2)

 + 5° external rotation

-2.2 (± 0.1)

-1.2 (± 0.4)

5° flexion

-1.5 (± 0.3)

0.0 (± 0.5)

 + 5° internal rotation

-1.5 (± 0.5)

0.4 (± 0.6)

 + 5° external rotation

-1.1 (± 0.1)

0.6 (± 0.6)

10° flexion

-0.8 (± 0.2)

0.6 (± 0.7)

 + 5° internal rotation

-0.8 (± 0.3)

0.3 (± 0.7)

 + 5° external rotation

0.3 (± 0.2)

2.1 (± 0.4)

  1. LDFA Lateral distal femoral angle, JL Joint line, med. medial, lat. lateral, diff. difference, values given in mean (± standard deviation)