The Influence of Preoperative Deformity on Valgus Correction Angle: An Analysis of 503 Total Knee Arthroplasties

Abstract We prospectively studied variations in valgus correction angle (VCA) and the influence of preoperative limb deformity on VCA in 503 consecutive total knee arthroplasties done in 393 patients. The percentage of limbs that had VCA values less than 5° was 10.9%, and that with VCA values greate...

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Veröffentlicht in:	The Journal of arthroplasty 2013, Vol.28 (1), p.20-27
Hauptverfasser:	Mullaji, Arun B., FRCS Ed, MCh Orth, MS Orth, Shetty, Gautam M., MS Orth, Kanna, Raj, MS Orth, Vadapalli, Ramesh Chandra, MS Orth
Format:	Artikel
Sprache:	eng
Schlagworte:	Adult Aged Aged, 80 and over alignment Arthroplasty, Replacement, Knee - methods computer navigation distal femur Female Genu Valgum - diagnostic imaging Genu Valgum - etiology Genu Valgum - surgery Humans Knee Joint - diagnostic imaging Knee Joint - surgery Male Middle Aged Observer Variation Orthopedics Osteoarthritis, Knee - complications Osteoarthritis, Knee - diagnostic imaging Osteoarthritis, Knee - surgery Radiography Rheumatic Fever - complications Rheumatic Fever - diagnostic imaging Rheumatic Fever - surgery total knee arthroplasty valgus cut
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Zusammenfassung:	Abstract We prospectively studied variations in valgus correction angle (VCA) and the influence of preoperative limb deformity on VCA in 503 consecutive total knee arthroplasties done in 393 patients. The percentage of limbs that had VCA values less than 5° was 10.9%, and that with VCA values greater than 7° was 44.9%. The percentage of limbs with VCA greater than 7° was significantly more in varus knees, and that with VCA less than 5° was significantly more in valgus knees; preoperative deformity showed a significant correlation with VCA. Choosing a fixed-routine VCA of 5° to 7° may cause an unacceptable planning error that may be minimized by individualizing VCA or using computer navigation.
ISSN:	0883-5403 1532-8406
DOI:	10.1016/j.arth.2012.04.014