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The SMILES prosthesis in salvage revision knee surgery
The Knee
|October 20, 2007
Summary
Revision total knee arthroplasty with a second-generation rotating hinge implant shows promising short-term outcomes. This advanced implant design improved patient function and knee scores, offering a viable solution for complex revision knee surgeries.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
Background:
- Revision total knee arthroplasty (TKA) is complex, often necessitated by implant failure, instability, or infection.
- Second-generation modular rotating hinge designs offer enhanced stability and bone coverage for challenging cases.
Purpose of the Study:
- To evaluate the early clinical and radiographic outcomes of revision TKA using a second-generation modular rotating hinge prosthesis.
- To assess functional improvements and complication rates in patients undergoing revision knee surgery with this implant.
Main Methods:
- A retrospective review of 32 revision TKAs in 30 patients over 8 years.
- Follow-up of 29 knees (29 patients) for a mean of 58 months (range, 4.5-11 years).
- Indications included sepsis, component failure, instability, aseptic loosening, fracture, and bone loss.
Main Results:
- Significant improvements were observed in Knee Society knee scores (26 to 68) and function scores (27 to 75).
- Range of motion also improved postoperatively.
- Low patellofemoral complication rate of 6%; one case of aseptic loosening noted radiographically.
Conclusions:
- The second-generation modular rotating hinge component demonstrates encouraging short-term results for revision knee surgery.
- This implant design appears effective in addressing diverse etiologies of TKA failure, including instability and bone loss.