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

Douglas S Weinberg; Jonathan J Streit; Jeremy J Gebhart; Drew F K Williamson; Victor M Goldberg

doi:10.1016/j.arth.2015.02.027

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.

Authors

Douglas S Weinberg¹, Jonathan J Streit¹, Jeremy J Gebhart¹, Drew F K Williamson¹, Victor M Goldberg¹

Affiliation

¹ Department of Orthopaedic Surgery, University Hospitals Case Medical Center, Case Western Reserve University School of Medicine, Cleveland, OH, USA.

PMID: 25783444
DOI: 10.1016/j.arth.2015.02.027

Abstract

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
Aged
Black People
Body Weights and Measures
Female
Femur / anatomy & histology*
Humans
Knee Joint / anatomy & histology*
Male
Middle Aged
White People