Patients with unresurfaced patella after TKA may have increased risk for revision
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Key takeaways:
- Patients with an unresurfaced patella after total knee arthroplasty had higher revision rates.
- Deviations in resurfaced and unresurfaced patellas continued to gain significance into postoperative year 5.
DALLAS —Patients who did not have patella resurfacing at the time of total knee arthroplasty had increased revision rates, according to data presented at the American Association of Hip and Knee Surgeons Annual Meeting.
“From a clinical standpoint, I would strongly consider resurfacing the patella at the time of surgery to avoid increased rates of revision and the morbidity and cost associated with that to the patient and the health care system,” Karl C. Roberts, MD, program director at the Spectrum Health/Michigan State University Orthopedic Surgery Residency Program, said in his presentation, here.
Using the Michigan Arthroplasty Registry Collaborative Quality Initiative, Roberts and colleagues retrospectively collected data from 162,292 patients who underwent primary total knee arthroplasty from 2012 to 2019, including rates of revision among patients who did and did not receive patella resurfacing. Roberts said patients were propensity score matched for sex and age.
“What we found was that the unresurfaced patellas had a higher revision rate with a hazard ratio of 1.6%,” Roberts said.
Although 1-year results were similar between patients who did and did not receive patella resurfacing, Roberts said deviations began between postoperative years 1 and 2. Roberts said these deviations continued to gain significance into postoperative year 5. Patients in the unresurfaced group had a statistically significant higher risk of revision due to pain.
“As we look at outcome studies on patella resurfacing vs. nonresurfacing, we have to consider that the early outcomes might be different than the late outcomes,” Roberts said.
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Roberts KC, et al. Paper 8. Presented at: American Association of Hip and Knee Surgeons Annual Meeting; Nov. 7-10, 2024; Dallas.
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