J Knee Surg 2019; 32(06): 554-559
DOI: 10.1055/s-0038-1660477
Original Article
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Medium- to Long-Term Results of the Nexgen Legacy Posterior Stabilized Fixed-Bearing Knee Replacement

Oommen Mathew Arikupurathu
1  University Department of Orthopaedic and Trauma Surgery, Tayside Orthopaedic and Rehabilitation Centre (TORT), Ninewells Hospital and Medical School, University of Dundee, Dundee, United Kingdom
,
Linda Johnston
1  University Department of Orthopaedic and Trauma Surgery, Tayside Orthopaedic and Rehabilitation Centre (TORT), Ninewells Hospital and Medical School, University of Dundee, Dundee, United Kingdom
,
Alasdair MacInnes
2  Directorate of Orthopaedic and Trauma Surgery, Ninewells Hospital and Medical School, Dundee, United Kingdom
,
Graeme Nicol
2  Directorate of Orthopaedic and Trauma Surgery, Ninewells Hospital and Medical School, Dundee, United Kingdom
,
Manhal Nassif
3  Directorate of Orthopaedic and Trauma Surgery, Perth Royal Infirmary, Taymount Terrace, Perth, United Kingdom
› Author Affiliations
Further Information

Publication History

10 October 2017

26 April 2018

Publication Date:
20 June 2018 (online)

Abstract

The NexGen legacy posterior stabilized (LPS) prosthesis was introduced in 1997 after many design changes to its predecessor, the Insall–Burstein II prosthesis. However, there have been no reported long-term studies on the performance of this implant. Prospectively, collected data from a local database comprising primary total knee replacements (TKRs) with LPS between 1997 and 2002 was analyzed. All implants were fixed with cement. Patients were followed up at 1, 3, 5, 7, and 10 years, with patient satisfaction, range of movement, and Knee Society score (KSS) assessed. A total of 621 primary TKRs were analyzed with an average follow-up of 11.25 years (9.15–14.55). The mean age was 69.53 years. The mean KSS was 88.97 and mean flexion increased from 88.3 to 103.5 degrees at 10 years. Kaplan–Meier's analysis revealed a survivorship of 96.5% with revision for any reason as the end point and 98.9% if aseptic loosening was the reason for revision at 14 years. This study revealed excellent mid- to long-term results with the NexGen LPS prosthesis.