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Journal of Bone and Joint Surgery - British Volume, Vol 90-B, Issue 10, 1304-1310.
doi: 10.1302/0301-620X.90B10.21050  
Copyright © 2008 by British Editorial Society of Bone and Joint Surgery
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The NexGen LPS-flex to the knee prosthesis at a minimum of three years

T.-H. Kim, MD, Orthopaedic Surgeon1; D.-H. Lee, MD, Clinical Assistant Professor2; and S.-I. Bin, MD, Professor3

1 Department of Orthopaedic Surgery, Cheong-ju St. Mary’s Hospital, 589-5, Jujung-dong, Sangdang-gu, Cheong-ju 360-568, Chungcheongbukdo, South Korea.
2 Department of Orthopaedic Surgery, Korea University Anam Hospital, College of Medicine, Korea University, Anam-dong 5-Ga, Seongbuk-gu, Seoul 136-705, South Korea.
3 Department of Orthopaedic Surgery, Asan Medical Center, College of Medicine, Ulsan University, 388-1, Pungnap-2-dong, Songpa-gu, Seoul 138-736, South Korea.

Correspondence should be sent to Dr S.-I. Bin; e-mail: sibin{at}amc.seoul.kr

We carried out a prospective study to assess the clinical outcome, complications and survival of the NexGen Legacy posterior-stabilised-Flex total knee replacement (TKR) in a consecutive series of 278 knees between May 2003 and February 2005. Mean follow-up for 259 TKRs (98.2%) was 3.8 years (3.0 to 4.8). Annual follow-up showed improvement in the Knee Society scores (paired t-test, p < 0.05). At the last follow-up, the mean maximum flexion was 135° (110° to 150°). Two knees showed radiolucent lines, but revision was not required because the patients were asymptomatic. Revision was required in one case because of infection, but there were no prosthesis-related revisions. There were no other complications. The estimated survival rate at four years with revision for any reason and prosthesis-related problems was 99.6% and 100%, respectively.

This relatively large study indicates that the legacy posterior stabilised-Flex design provides excellent short-term outcome but warrants ongoing evaluation to confirm the long-term durability and functioning of the implant.






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Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General