Patellofemoral Joint Replacement and Nickel Allergy: An Unus
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Metal allergy is an unusual complication of joint replacement that may cause aseptic loosening and necessitate joint revision surgery. We present the case of nickel allergy causing aseptic loosening following patellofemoral joint replacement (PFJR) in a 54-year-old male.

Joint revision surgery to a nickel-free total knee replacement was performed with good results. The evidence from studies of total knee replacement is limited to retrospective case series and case reports and gives contradictory recommendations. The optimal management strategy for metal allergy in PFJR is not clear. Allergy testing is recommended in patients with the history of metal allergy and use of an allergen-free implant in those with positive tests.

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