Systemic Metal Ion Levels in Patients With Modular-Neck Stems: A Prospective Cohort Study
| Autor: | Hannes A. Rüdiger, Fabio Becce, Hassen Hassani, Mohamed Faouzi, Marc Augsburger, Jonathan Laurençon |
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| Rok vydání: | 2016 |
| Předmět: |
Adult
Chromium Male 0301 basic medicine medicine.medical_specialty Arthroplasty Replacement Hip medicine.medical_treatment chemistry.chemical_element Prosthesis Design Metal 03 medical and health sciences Metal Artifact 0302 clinical medicine Humans Medicine Orthopedics and Sports Medicine Prospective Studies Registries Prospective cohort study Aged Whole blood Aged 80 and over Molybdenum Titanium 030222 orthopedics medicine.diagnostic_test business.industry Magnetic resonance imaging Cobalt Middle Aged Magnetic Resonance Imaging Arthroplasty Prosthesis Failure Surgery Corrosion 030104 developmental biology chemistry visual_art visual_art.visual_art_medium Female Hip Prosthesis Implant business |
| Zdroj: | The Journal of Arthroplasty. 31:1750-1755 |
| ISSN: | 0883-5403 |
| DOI: | 10.1016/j.arth.2016.01.030 |
| Popis: | Background Recent registry data reveal that modular-neck hip prostheses are associated with increased revision rates compared to fixed-neck stems. Poor implant survival has been associated to corrosion at the neck-stem junction, inducing metal ion release and subsequently adverse local tissue reactions. Data on metal ion release on the neck-stem junction of such stems are scarce. The purpose of this study was to evaluate corrosion at this interface by determining metal ion release. Methods Serum and whole blood metal ion levels of 40 patients after 1 year of implantation of a modular-neck stem (titanium stem and cobalt-chromium neck) were compared with 10 patients with a monobloc version of the stem (all titanium) and 10 patients having no implant at all. Results Seven of 40 patients (18%) with a modular-neck stem had cobalt or chromium concentrations >2 μg/L. These patients underwent magnetic resonance imaging using metal artifact reduction sequences, which revealed a pseudotumor in 1 patient. Conclusion Corrosion at the neck-stem junction of modular-neck stems is a reported phenomenon, which is in part reflected by elevated systemic ion levels. The use of such implants should be restricted to a minimum, and screening algorithms of patients with such implants must be developed. |
| Databáze: | OpenAIRE |
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