title: Femoral rotation in ligament balanced knee arthroplasty: a prospective clinical study.
abstract: Rotational alignment of the femoral component is an important factor to achieve beneficial results in total knee arthroplasty. Femoral rotation pre versus post surgery was prospectively assessed in 40 patients who underwent ligament balanced knee arthroplasty. Computerized tomography of the knee was performed before and after the surgery to determine the femoral rotation. In 36 out of 40 patients the rotation of the femoral implants differed compared to the preoperative femur (P > 0.001). After surgery the rotational alignment of the femoral component ranged from -3° (internal rotation) to 7° (external rotation). Increased external rotation was found in 33 out of 40 patients ranging from 1° to 7°. These results highlight the importance of individually determined femoral rotation in ligament balanced knee arthroplasty.
authors.affiliation: Orthopaedic Department, Barmherzige Brüder Hospital, Eisenstadt, Austria.
authors.forename: Martin
authors.initials: M
authors.lastname: Kaipel
authors.forename: Istvan
authors.initials: I
authors.lastname: Gergely
authors.forename: Katrina
authors.initials: K
authors.lastname: Sinz
authors.forename: Christian
authors.initials: C
authors.lastname: Neumann
authors.forename: Günter
authors.initials: G
authors.lastname: Sinz
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging / Q000601:surgery*; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D011446:Prospective Studies; D012399:Rotation; D018709:Statistics, Nonparametric; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome
keywords: CT scan; computer assisted knee surgery; femoral rotation; knee arthroplasty; ligament balancing