title: Is the surgical epicondylar axis the center of rotation in the osteoarthritic knee?
abstract: The relationship between the surgical epicondylar axis (SEA) and the rotational axis of the distal femur remains unclear. We investigated the relationship between the SEA and the distal femur and whether the SEA can be used as the rotational axis of the knee. Angular and linear measurements of 70 femora at 0°, 30°, 60°, 90°, and 120° of flexion were recorded. Results showed that the SEA was a logical and appropriate parameter as a principal axis for knee flexion at least between 0° and 60° of flexion. The study has important implications for the design and positioning of femoral components in total knee arthroplasty.
authors.affiliation: Department of Orthopaedic Surgery, Yokohama City University School of Medicine.
authors.forename: Hideo
authors.initials: H
authors.lastname: Kobayashi
authors.affiliation: Department of Orthopaedic Surgery, Yokohama City University School of Medicine.
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Akamatsu
authors.affiliation: Department of Orthopaedic Surgery, Yokohama City University School of Medicine.
authors.forename: Ken
authors.initials: K
authors.lastname: Kumagai
authors.affiliation: Department of Orthopaedic Surgery, Yokohama City University School of Medicine.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Kusayama
authors.affiliation: Department of Orthopaedic Surgery, Yokohama City University School of Medicine.
authors.forename: Masato
authors.initials: M
authors.lastname: Aratake
authors.affiliation: Department of Orthopaedic Surgery, Yokohama City University School of Medicine.
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Saito
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000601:surgery; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000601:surgery; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000601:surgery; D010027:Osteotomy; D016059:Range of Motion, Articular; D012399:Rotation; D013977:Tibia / Q000601:surgery; D014057:Tomography, X-Ray Computed
keywords: computed tomography (CT); cylindrical axis; flexion–extension axis (FEA); gender differences; surgical epicondylar axis (SEA); total knee arthroplasty (TKA)