Abstract
Purpose
We report the clinical, radiological and wear analysis of 52 consecutive MoM hip resurfacings (performed on 49 younger patients) to a mean follow-up of 9.2 years.
Methods
Every patient underwent X-ray and clinical evaluation (HHS). Ultrasonography of the hip was performed in all patients in order to identify possible cystic or solid mass in periprosthetic tissue. In case of mass >20 mm, further MRI was performed to better analyse the characteristics of lesion.
Results
Five patients (five hips) had a revision. The overall survival rate was 90.38 %. The average HHS at follow-up examination was 95.5 points. No progressive radiolucent areas and no sclerosis or osteolysis around the implants were found. The US and RMI imaging showed a pseudotumour formation in two patients (correlated with high metal ion levels in blood and urine), both asymptomatic.
Conclusion
A significant positive correlation between inclination of the acetabular component and serum metal ion levels was found (r = 0.64 and r = 0.62 for cobalt and chromium, respectively).
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Scaglione, M., Fabbri, L., Bianchi, N. et al. Metal-on-metal hip resurfacing: correlation between clinical and radiological assessment, metal ions and ultrasound findings. Musculoskelet Surg 99, 45–53 (2015). https://doi.org/10.1007/s12306-014-0344-x
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DOI: https://doi.org/10.1007/s12306-014-0344-x