Abstract
Introduction
Safety and efficacy of unicompartmental knee arthroplasty (UKA) has been shown in large patient series. Patellofemoral replacement (PFR) is known to be a viable solution to end-stage patellofemoral arthritis. Bicompartmental osteoarthritis (OA) affecting the medial tibio-femoral and the patello-femoral compartment (medio-patellofemoral OA) is often treated with total knee arthroplasty (TKA). It was hypothesized that medio-patellofemoral OA can successfully be treated with bicompartmental arthroplasty.
Method
In a retrospective approach nine patients who had received UKA in combination with PFR were included into the study. Intact ACL and lateral compartment were conditions for the indication. Patients were clinically examined including clinical scores (KSS and WOMAC) and radiographies were evaluated. Satisfaction of patients was recorded under four categories.
Results
Average follow-up after bicompartmental arthroplasty was 11.8 ± 5.4 years (4–17 years). Among the nine patients there were eight females and one male at an average age at operation of 64 ± 5 years. No surgical revisions were required following bicompartmental arthroplasty. The KSS score increased from a preoperative 68.8 ± 26.2 to 175.5 ± 22.9 at latest follow-up (p = 0.002). WOMAC was 18.3 ± 8.6 at latest follow-up. All patients included were satisfied (n = 3) or very satisfied (n = 6) with the outcome of this surgical procedure.
Conclusion
This small case series shows that a bicompartmental arthroplasty can be a successful approach to prevent or postpone TKA. However, this intervention is technically demanding and requires experience in both UKA and PFR.
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Abbreviations
- KSS:
-
Knee Society Score
- OA:
-
Osteoarthritis
- PE:
-
Polyethylene
- PFR:
-
Patellofemoral replacement
- TKA:
-
Total knee arthroplasty
- UKA:
-
Unicompartmental knee arthroplasty
- WOMAC:
-
Western Ontario and McMaster University Osteoarthritis Index
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Acknowledgments
The authors thank the national German society of orthopaedic surgery (DGOOC) for funding of this work and Chantal Hachet, Roselyne Ihoute and Vanessa Simonnet for their support in patient consultation and chart review.
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Heyse, T.J., Khefacha, A. & Cartier, P. UKA in combination with PFR at average 12-year follow-up. Arch Orthop Trauma Surg 130, 1227–1230 (2010). https://doi.org/10.1007/s00402-009-0997-3
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DOI: https://doi.org/10.1007/s00402-009-0997-3