Important Differences Exist in Posterior Condylar Offsets in an Osteological Collection of 1,058 Femurs

J Arthroplasty. 2015 Aug;30(8):1434-8. doi: 10.1016/j.arth.2015.02.027. Epub 2015 Feb 28.


Posterior condylar offset (PCO) has important implications in total knee arthroplasty (TKA) function and design. In an osteological study of 1,058 femurs, we measured PCO using two separate techniques with a 3D digitizer. Measurements were standardized for the size of the femur. The medial PCO was greater than lateral PCO (32.6mm vs. 31.2mm, P<0.0001). In 53% of individuals, the medial PCO differed between sides by more than 2mm. Age did not affect standardized medial or lateral PCO. Compared with African-Americans, Caucasians had a larger standardized medial (1.3mm vs. 1.2mm, P=0.006) and lateral (1.1mm vs. 1.0mm, P=0.004) PCOs. The standardized medial (1.2mm vs. 1.3mm, P=0.073), and lateral (1.1mm vs. 1.1mm, P=0.098), PCO did not differ between men and women, respectively.

Keywords: distal femur; implant design; knee anatomy; posterior condylar offset; total knee arthroplasty.

MeSH terms

  • Adult
  • African Continental Ancestry Group
  • Aged
  • Body Weights and Measures
  • European Continental Ancestry Group
  • Female
  • Femur / anatomy & histology*
  • Humans
  • Knee Joint / anatomy & histology*
  • Male
  • Middle Aged