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Updated: May 23, 2026
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Tissue Collection and RNA Extraction from the Human Osteoarthritic Knee Joint
Published on: July 22, 2021
Painful knee arthroplasty: definition and overview
Christian Carulli1, Marco Villano, Giovanni Bucciarelli
1First Orthopaedic Clinic, University of Florence, Florence, Italy.
Summary
Total Knee Arthroplasty (TKA) complications can arise from various causes. This study investigates metal hypersensitivity, an increasingly recognized issue in painful TKAs, and discusses its diagnosis and prevention.
Area of Science:
- Orthopaedic Surgery
- Biomaterials Science
- Clinical Medicine
Background:
- Total Knee Arthroplasty (TKA) is a highly successful procedure with over 90% long-term survival.
- Increasing TKA rates due to aging populations and degenerative joint disease may lead to a rise in complication rates.
- Painful TKA is an uncommon but challenging complication, with causes categorized as early or late, and referred, periarticular, or intra-articular.
Purpose of the Study:
- To investigate the incidence, clinical features, and diagnostic pathways of metal hypersensitivity in patients experiencing painful Total Knee Arthroplasty.
- To focus on the prevention strategies for metal hypersensitivity, a growing concern in TKA complications.
- To characterize metal hypersensitivity as a specific clinical issue in the context of painful TKAs.
Main Methods:
- Review of early and late causes of painful TKA, including implant instability, extensor mechanism issues, aseptic loosening, infection, reflex sympathetic dystrophy, synovitis, and metal hypersensitivity.
- Analysis of reported cases and literature concerning metal hypersensitivity following TKA.
- Discussion of diagnostic approaches and preventative measures for metal hypersensitivity.
Main Results:
- Common causes of painful TKA include implant instability, extensor mechanism dysfunction, aseptic loosening, and infection.
- Less common causes include reflex sympathetic dystrophy, synovitis, and metal hypersensitivity.
- Metal hypersensitivity is an emerging clinical issue with increasing incidence but lacks specific characterization.
Conclusions:
- Painful TKA can stem from diverse etiologies, with metal hypersensitivity being a significant and increasingly recognized complication.
- Further research is needed to fully characterize metal hypersensitivity and establish definitive diagnostic criteria.
- Implementing preventative strategies is crucial for managing metal hypersensitivity and improving outcomes in Total Knee Arthroplasty patients.
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