Study Evaluates Functional Outcomes of TKA in Patients with a Metal Allergy
Patients with metal allergies experience slower early recovery and may be less likely to achieve their desired mobility and quality of life after total knee arthroplasty (TKA), according to research from NYU Langone Orthopedics.
Metal hypersensitivity is linked to complications after TKA, although its specific impact on patient-reported outcomes has been poorly understood.
The NYU Langone study, presented at the Annual Meeting for the American Academy of Orthopaedic Surgeons, compared postoperative functional outcomes at 6 weeks, 3 months, and 1 year after primary TKA across a retrospective cohort of 20,634 patients.
The researchers found that patients who reported metal allergies experienced reduced early recovery and were less likely to achieve clinically meaningful improvement over time, compared with patients who reported non-metal allergies and patient who reported not having any allergies at all.
They also found no difference in outcomes between patients with a reported metal allergy who received hypoallergenic implants compared with standard implants.
“From a clinical standpoint, this emphasizes the importance of early identification of patients at risk for suboptimal postoperative progress and tailoring expectations and support accordingly,” said Anna Cohen-Rosenblum, MD, director of patient-reported outcomes research at NYU Langone Orthopedics.
“Given the potential implications for postoperative satisfaction and rehabilitation, clinicians should be aware of the impact of metal allergies and consider additional support or counseling for affected individuals.
“Future prospective studies incorporating larger numbers of patients with allergy testing and implant type will help clarify the mechanisms underlying these outcome differences, and guide optimal management strategies, which may not necessarily require the use of hypoallergenic implants.”
Source
Cohen-Rosenblum A, Sarfraz A, Lajam CM, Khury FJ, Kennedy MF, Schwarzkopf R, Antonioli S, Aggarwal V. Are Patients with Metal Allergies at Higher Risk of Poor PROMs after Total Knee Arthroplasty? A Comparative Study (Program Number: 623). Presented at the Annual Meeting of the American Academy of Orthopaedic Surgeons, March 2-6, 2026, New Orleans, Louisiana.