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Table 2 Rotational offset of each component at the start of movement

From: Mobile-bearing insert used with total knee arthroplasty does not rotate on the tibial tray during a squatting activity: a cross-sectional study

 

10 weeks postoperatively

1 year postoperatively

p values

Knee flexion angle (degrees)

− 2.0 [− 5.5, 1.6]

− 3.2 [− 10.9, 4.4]

0.709

FEM/TIB (degrees)

6.0 [2.0, 9.9]

4.0 [0.8,7.2]

0.041

FEM/INS (degrees)

− 0.3 [− 1.0, 0.4] ※

− 0.8 [− 2.4, 0.7] †

0.539

INS/TIB (degrees)

6.3 [2.1, 10.4] ※

4.9 [1.4, 8.3] †

0.136

p-value (FEM/INS with INS/TIB)

0.013

0.011

 
  1. Mean [95% CI]
  2. ※FEM/INS was significantly smaller than that of INS/TIB at 10 weeks postoperatively
  3. †FEM/INS was significantly smaller than that of INS/TIB at 1 year postoperatively
  4. FEM/TIB rotation of the femoral component relative to the tibial component, FEM/INS rotation of the femoral component relative to the polyethylene insert, INS/TIB rotation of the polyethylene insert relative to the tibial component, p value probability value, 95% CI 95% confidence interval
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Journal of Orthopaedic Surgery and Research

ISSN: 1749-799X