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More than 90% survivorship at 16 years found for revision TKA using constrained knee prosthesis
Researchers of this study found use of a constrained knee prosthesis for revision total knee arthroplasty had good clinical and radiographic results at a mean follow-up of 14.6 years; however, they noted constraint of this knee prosthesis may lead to increased aseptic loosening in the long-term.
Researchers collected data from 194 patients (228 knees) who underwent revision total knee arthroplasty (TKA) with the use of a constrained condylar knee prosthesis from January 1995 to February 2003.
Results showed improvement in median Knee Society knee (43.5 points to 85.6 points) and function (47.9 points to 68.5 points) scores from pre-revision measures. They also found a median pain score derived from Knee Society knee score of 10.4 points preoperatively and 45.1 points at final follow-up. WOMAC scores were 88 points preoperatively and 28 points postoperatively, according to study results.
Overall, re-revision occurred in 18 knees for femoral and/or tibial components. Of the 18 knees, results showed 12 underwent re-revision for aseptic loosening; four for infection; and two for instability. According to Kaplan-Meier survivorship analysis, the rate of survival of the components was 94.7% at 16-years using loosening as the end point and 92.1% using revision as the end point. – by Casey Tingle
Disclosures: The researchers report no relevant financial disclosures.