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Guided-motion hinged knee replacement prosthesis: early survival rate and postoperative patient function and
David L Perrin1, Thomas R Turgeon1
1From the Department of Surgery, Section of Orthopaedic Surgery, University of Manitoba, Winnipeg, Man. (Perrin, Turgeon); and the Concordia Joint Replacement Group, Concordia Hip & Knee Institute, Winnipeg, Man. (Turgeon).
The Legion HK Hinge Knee Replacement prosthesis shows a 90.7% 2-year survival rate in complex primary or revision total knee replacement cases. Patients experienced significant functional improvement and high satisfaction following implantation.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Reconstructive Surgery
Background:
- Limited literature exists on hinged total knee replacement (HTKR) survival rates and function.
- No prior studies have evaluated the Legion HK Hinge Knee Replacement prosthesis with guided-motion articulation.
Purpose of the Study:
- To determine the early survival rate of the Legion HTKR prosthesis at a single institution.
- To assess postoperative patient function and satisfaction with this modern HTKR.
Main Methods:
- Retrospective study of 39 Legion HTKR implantations (primary and revision) between October 2011 and March 2016.
- Inclusion of patients from a tertiary care center in Manitoba, Canada.
- Assessment of preoperative and postoperative Oxford Knee Scores and patient satisfaction.
Main Results:
- 39 HTKR implantations (38 patients) were analyzed, including 12 primary and 27 revision cases.
- Mean follow-up was 29.1 months, with 3 revision surgeries and 4 perioperative complications.
- The 2-year survivorship of the HTKR system was 90.7%, with significant improvement in functional scores and high patient satisfaction.
Conclusions:
- The early survival rate of this modern guided-motion HTKR is comparable to other published hinged knee prostheses.
- The Legion HTKR prosthesis offers substantial postoperative functional improvement for complex primary or revision total knee replacement.
