The effect of restored medial knee anatomy in total knee arthroplasty with the flexion first balancer technique on mid-flexion laxity and functional outcome

Autor: W. A. M. van Lieshout, I. van Oost, K. L. M. Koenraadt, L. H. G. J. Elmans, R. C. I. van Geenen
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: BMC Musculoskeletal Disorders, Vol 22, Iss 1, Pp 1-8 (2021)
Druh dokumentu: article
ISSN: 1471-2474
DOI: 10.1186/s12891-021-04869-3
Popis: Abstract Background The Flexion First Balancer (FFB) technique for total knee arthroplasty (TKA) was developed to maintain the isometry of the medial collateral ligament (MCL) by restoring the medial anatomy of the knee. Inability to correct MCL isometry could hypothetically result in an increased mid-flexion laxity. The aim of the current study was to evaluate if the FFB technique results in improved functional outcome and less mid-flexion laxity compared to Measured Resection (MR). Methods A cross-sectional study was performed comparing 27 FFB patients with 28 MR patients. Groups were matched for age, gender, BMI and ASA classification. All patient received the cruciate retained type, Vanguard Complete Knee System (Biomet Orthopedics, Warsaw, IN, USA). Stress X-rays of the knee with 30 degrees of flexion were made to assess varus-valgus laxity. Furthermore, three tests were conducted to asses functional outcome: a 6 min walk test, a stair climb test and quadriceps peak force measurements. Mean follow-up was respectively 2.6 (SD 0.4) and 3.9 years (SD 0.2). Results The MR group showed a postoperative elevation in joint line in contrast to the FFB group, the mean difference between the two groups was 3 mm (p
Databáze: Directory of Open Access Journals