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Table 3 Comparison of knee flexion angle and radiographic measurements at 1 year after surgery

From: Kinematics and center of axial rotation during walking after medial pivot type total knee arthroplasty

 

Knee flexion (°)

FTA (°)

α angle (°)

β angle (°)

γ angle (°)

δ angle (°)

WBL (%)

Medial dilation of the tibiofemoral joint (mm)

MP-CS group

130.3 ± 7.0

176.3 ± 2.7

96.5 ± 1.9

88.5 ± 1.5

2.1 ± 1.9

84.7 ± 2.4

40.0 ± 7.2

1.4 ± 0.7

MP-PS group

133.4 ± 6.7

175.2 ± 2.5

97.0 ± 1.7

88.7 ± 1.5

3.0 ± 2.6

84.0 ± 2.1

40.8 ± 13.3

1.6 ± 0.5

  1. FTA Femorotibial angle; α, femoral component angle; β, tibial component angle; γ, femoral component flexion angle; δ, tibial posterior slope; WBL Weight bearing line; MP Medial pivot; CS Cruciate-substituting; PS Posterior-stabilized. There was no significant difference between the two MP groups (unpaired t-test, significance level < 5%)