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No difference in patient reported outcome and inflammatory response after coated and uncoated total knee arthroplasty – a randomized controlled study
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No difference in patient reported outcome and inflammatory response after coated and uncoated total knee arthroplasty – a randomized controlled study
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Journal Article
No difference in patient reported outcome and inflammatory response after coated and uncoated total knee arthroplasty – a randomized controlled study
2023
Overview
Background
Allergies against implant materials are still not fully understood. Despite controversies about its relevance, some patients need treatment with hypoallergenic implants. This study compared coated and standard total knee arthroplasty (TKA) regarding inflammatory response and patient-reported outcome measures (PROMs).
Methods
76 patients without self-reported allergies against implant materials were included in a RCT and received a coated or standard TKA of the same cemented posterior-stabilized knee system. 73 patients completed the 3-year follow-up. Two patients died and there was one revision surgery. Serum levels of cytokines with a possible role in implant allergy were measured in patient`s serum (IL-1beta, IL-5, IL-6, IL-8, IL-10, IFN γ, TNF α) prior to, one and three years after surgery. Furthermore, PROMs including knee function (Oxford Knee Score, Knee Society Score) and health-related quality of life (QoL, EuroQuol questionnaire) were assessed. Additionally, 8 patients with patch-test proven skin allergy against implant materials who received the coated implant were assessed similarly and compared to a matched-pair group receiving the same implant.
Results
There were no differences in function and QoL between the assessed groups at any follow-up. The majority of patients demonstrated no elevation of the measured blood cytokines. Cytokine patterns showed no differences between study groups at any follow-up. The allergy patients demonstrated slower functional improvement and minor differences in cytokine pattern. Yet these results were not significant. There were no differences in the matched-pair analysis.
Conclusion
We observed no relevant increase in serum cytokine levels in any group. The inflammatory response measured seems limited, even in allergy patients. Furthermore, there were no differences between coated and standard TKA in non-allergy patients in the 3-year Follow-Up period.
Trial registration
The study protocol was registered in the US National Institutes of Health’s database (
http://www.clinicaltrials.gov
) registry under NCT03424174 on 03/17/2016.
Publisher
BioMed Central,BioMed Central Ltd,Springer Nature B.V,BMC
Subject
/ Allergy
/ Arthroplasty, Replacement, Knee - adverse effects
/ Arthroplasty, Replacement, Knee - methods
/ Coatings
/ Humans
/ Knee Prosthesis - adverse effects
/ Medicine
/ Nickel
/ Osteoarthritis, Knee - etiology
/ Osteoarthritis, Knee - surgery
/ Patient Reported Outcome Measures
/ Patients
/ Software
/ Surgery
