Long-term survival analysis of posterior cruciate-retaining total knee arthroplasty
Guo, L., Yang, L., Briard, J.L. et al.Knee
Purpose
Clinical factors related to cruciate-retaining knee arthroplasty failure in a long-term follow-up are yet unclear. The study was designed to evaluate the long-term survival rate of cruciate-retaining arthroplasty and clinical factors that may contribute to its failure.
Methods
A total of 162 patients (188 knees) who received cruciate-retaining press-fit condylar arthroplasty from June 1993 to May 1994 were followed up. All patients were assessed clinically and radiographically. Revision for any reason was regarded as failure of arthroplasty.
Results
A total of 120 patients (138 knees) were successfully followed up. Survivorship over 17 years was 92.5%. Fourteen knees were revised. Tibial varus angle of the operated knee in the unrevised patient group was greater than in revised group. There was statistical difference between these two groups (P < 0.05).
Conclusion
Long-term survivorship of cruciate-retaining arthroplasty was fair. Varus and valgus deformity of the unoperated contralateral knee and tibial varus deformity of the operated knee could be important factors related to arthroplasty failure.
Clinical relevance
This long-term follow-up result of Press-Fit Condylar cruciate-retaining arthroplasty was good considering it was an old design. The alignment of the operated knee and deformity of the unoperated contralateral knee are important clinical factors that should be paid attention to avoid unexpected arthroplasty failure.
Level of evidence
IV.
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