title: Important Differences Exist in Posterior Condylar Offsets in an Osteological Collection of 1,058 Femurs.
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.
authors.affiliation: Department of Orthopaedic Surgery, University Hospitals Case Medical Center, Case Western Reserve University School of Medicine, Cleveland, OH, USA.
authors.forename: Douglas S
authors.initials: DS
authors.lastname: Weinberg
authors.affiliation: Department of Orthopaedic Surgery, University Hospitals Case Medical Center, Case Western Reserve University School of Medicine, Cleveland, OH, USA.
authors.forename: Jonathan J
authors.initials: JJ
authors.lastname: Streit
authors.affiliation: Department of Orthopaedic Surgery, University Hospitals Case Medical Center, Case Western Reserve University School of Medicine, Cleveland, OH, USA.
authors.forename: Jeremy J
authors.initials: JJ
authors.lastname: Gebhart
authors.affiliation: Department of Orthopaedic Surgery, University Hospitals Case Medical Center, Case Western Reserve University School of Medicine, Cleveland, OH, USA.
authors.forename: Drew F K
authors.initials: DF
authors.lastname: Williamson
authors.affiliation: Department of Orthopaedic Surgery, University Hospitals Case Medical Center, Case Western Reserve University School of Medicine, Cleveland, OH, USA.
authors.forename: Victor M
authors.initials: VM
authors.lastname: Goldberg
mesh_terms: D000328:Adult; D000368:Aged; D044383:Black People; D001837:Body Weights and Measures; D005260:Female; D005269:Femur / Q000033:anatomy & histology*; D006801:Humans; D007719:Knee Joint / Q000033:anatomy & histology*; D008297:Male; D008875:Middle Aged; D044465:White People; D001741:Black or African American
keywords: distal femur; implant design; knee anatomy; posterior condylar offset; total knee arthroplasty