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Table 2 The tibial component rotational alignment in normal and OA knees

From: Anterior tibial curved cortex is a reliable landmark for tibial rotational alignment in total knee arthroplasty

  Tibial Component Rotational Alignment
Normal knees (n = 40) OA knees (n = 120)
Mean ± SD (°)a Range (°)a Mean ± SD (°)a Range (°)a P valueb
PCL-PT 2.8 ± 4.9 −8.2 ~ 13.2 −1.2 ± 4.7 −13.8 ~ 10.0 < 0.001
PCL-TT1 4.0 ± 4.7 −6.2 ~ 12.2 0.3 ± 5.5 −19.7 ~ 10.6 < 0.001
PCL-TT2 14.7 ± 5.0 5.4 ~ 23.5 9.8 ± 5.4 −8.1 ~ 21.9 < 0.001
PCL-TT3 19.9 ± 5.4 8.4 ~ 28.7 14.8 ± 5.4 0 .3 ~ 27.8 < 0.001
ATCC 1.6 ± 2.8 −1.7 ~ 7.7 0.8 ± 2.7 −7.9 ~ 9.2 0.047
  1. aInternal rotation was denoted as a negative value, and external rotation as a positive value
  2. bStudent’s t-test