http://www.bjr.boneandjoint.org.uk/content/1/12/315.full.pdf+html

Does a new knee design perform as well as the design it replaces?

1. M. Molt, MD, Orthopaedic Surgeon1 , 
2. P. Ljung, MD, PhD, Orthopaedic Surgeon1 and 
3. S. Toksvig-Larsen, MD, PhD, Associate Professor, Orthopaedic Surgeon1

+Author Affiliations

1. ¹Hässleholm Hospital, Orthopaedic Clinic Hässleholm - Kristianstad - Ystad, Box 351, 281 25 Hässleholm, Sweden.

1. Correspondence should be sent to Dr M. Molt; e-mail: mats.molt@skane.se

1. Author contributions: M. Molt: Writing the paper, Data analysis, Data collection, Performed surgeries
   P. Ljung: Control of manuscript
   S. Toksvig-Larsen: Study protocol, Data analysis, Data collection, Statistical analysis, Performed surgeries, Control of manuscript

Abstract

Objectives The objective of this study was to compare the early migration characteristics and functional outcome of the Triathlon cemented knee prosthesis with its predecessor, the Duracon cemented knee prosthesis (both Stryker).

Methods A total 60 patients were prospectively randomised and tibial component migration was measured by radiostereometric analysis (RSA) at three months, one year and two years; clinical outcome was measured by the American Knee Society score and the Knee Osteoarthritis and Injury Outcome Score.

Results There were no statistically significant differences in rotation or translation around or along the three coordinal axes, or in the maximum total point motion (MTPM) during the two-year follow-up.

Conclusions The Triathlon cemented knee prosthesis has similar early stability and is likely to perform at least as well as the Duracon cemented knee prosthesis over the longer term.

• Total knee replacement
 
• Single radius
 
• New design
 
• Safety
 
• RSA
• TKR

Footnotes

• Funding statement: This work was supported by Stryker SA.
• ICMJE Conflict of Interest: The authors have no other conflicts of interest. The study sponsor had no involvement in the analysis and interpretation of the results
• ©2012 British Editorial Society of Bone and Joint Surgery. This is an open-access article distributed under the terms of the Creative Commons Attributions licence, which permits unrestricted use, distribution, and reproduction in any medium, but not for commercial gain, provided the original author and source are credited.

• Received February 27, 2012.
• Accepted October 9, 2012.

• ©2012 British Editorial Society of Bone and Joint Surgery