Study finds 15.7% conversion rate from arthroscopic meniscectomy to TKR at 20 years
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At 20 years, patients who underwent arthroscopic meniscectomy for degenerative meniscus tears were converted to total knee replacement at a 15.7% rate, according to published results.
Alessandro Aprato, MD, and colleagues retrospectively reviewed data on 160 patients (aged 50 to 70 years) who underwent arthroscopic meniscectomy (AM) for degenerative meniscus tears (DMT) with a minimum 20-year follow-up.
According to the study, outcome measures included the KOOS, and rate and timing of conversion to TKR. Researchers also recorded patient data on age, sex, injured meniscus, knee alignment, osteoarthritis, lesions and procedural differences.
Overall, Aprato and colleagues found a 15.7% conversion rate at 20 years with a mean time of 7 years between surgeries. Female sex, older age, lateral meniscectomy, malalignment and advanced chondral lesions were linked to an increased risk of subsequent conversion to TKR. Additionally, researchers found patients older than 60 years who had a lateral meniscectomy and concurrent ACL reconstruction had the highest risk for poor clinical outcomes at 20 years.
“Therefore, during DMT treatment, if patients have negative predictor factors, AM should not be proposed as second-line treatment; rather, nonoperative management should be continued until TKR is unavoidable,” Aparato and colleagues wrote in the study.
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