Variances in sagittal femoral shaft bowing in patients undergoing TKA

Tameem M Yehyawi; John J Callaghan; Douglas R Pedersen; Michael R O'ROURKE; Steve S Liu

doi:10.1097/BLO.0b013e318157e4a2

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Variances in sagittal femoral shaft bowing in patients undergoing TKA

Journal article

Open access

Peer reviewed

Variances in sagittal femoral shaft bowing in patients undergoing TKA

Tameem M Yehyawi, John J Callaghan, Douglas R Pedersen, Michael R O'ROURKE and Steve S Liu

Clinical orthopaedics and related research, Vol.464(464), pp.99-104

11/01/2007

DOI: 10.1097/BLO.0b013e318157e4a2

PMID: 17767082

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Abstract

We asked, “What are the quantitative variances in sagittal femoral bowing in patients who were indicated for total knee arthroplasty?” We retrospectively evaluated 145 consecutive patients who underwent 166 primary total knee arthroplasties with adequate preoperative nonrotated sagittal plane full-leg lateral radiographs. Digital radiographs were processed such that each femoral shaft was divided into three segments. A purpose-written program determined the flexion/extension of the femoral component using the Knee Society method of focusing on the distal femur and a second method using the whole femur. The median angle of curvature of the proximal, middle, and distal thirds of the femora were 5.4°, 0.2°, and 3.1°, respectively, with the largest bow occurring in the proximal segment followed by the distal segment and with the least bow in the middle segment. The median angles for femoral component flexion were considerably different with the whole femur angle showing more flexion (4°) than that of the Knee Society angle (1.421°). We found an inverse relationship between distal angle of curvature and height as well as weight. Men had greater proximal bowing and less distal bowing than women. The effects of these variances may have implications in development of osteoarthritis and total knee arthroplasty component survival.

Osteoarthritis

Biological and medical sciences

Diseases of the osteoarticular system

Medical sciences

Miscellaneous. Osteoarticular involvement in other diseases

Orthopedic surgery

Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases

Details

Title: Subtitle: Variances in sagittal femoral shaft bowing in patients undergoing TKA
Creators: Tameem M Yehyawi - University of Iowa
John J Callaghan - University of Iowa
Douglas R Pedersen - University of Iowa
Michael R O'ROURKE - Department of Orthopaedics and Rehabilitation, University of Iowa, Iowa City, IA, United States
Steve S Liu - University of Iowa
Resource Type: Journal article
Publication Details: Clinical orthopaedics and related research, Vol.464(464), pp.99-104
DOI: 10.1097/BLO.0b013e318157e4a2
PMID: 17767082
NLM abbreviation: Clin Orthop Relat Res
ISSN: 0009-921X
eISSN: 1528-1132
Publisher: Springer
Language: English
Date published: 11/01/2007
Academic Unit: Roy J. Carver Department of Biomedical Engineering; Orthopedics and Rehabilitation
Record Identifier: 9984622751502771

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