Serious metallosis of a metal head due to fragmented ceramic screws in a cemented THA

Archives of Orthopaedic and Trauma Surgery
Hidenobu MikiHideki Yoshikawa

Abstract

We reported a rare revision case necessitated by massive metallosis of a metal head due to a fragmented ceramic screw which had been extraarticularily used in the primary THA here and reviewed previous literature about metallosis of metal heads associated with ceramic materials. The ceramic screw had been used for the fixation of a bone graft and reattachment of the greater trochanter in the primary THA. Scanning electron microscope analysis revealed large alumina ceramic particles embedded on the bearing surface of the polyethylene. It has previously been pointed out that metallosis of an inner head occurred in bipolar case due to a fracture of the ceramic screws in contact with a proximally migrated outer head. However, this case showed that if a ceramic screw fragmented even though it was used outside of the hip joint, the fragments could migrate into bearing surface and cause serious metallosis of the metal head. Thus, we recommend that surgeons should pay special attention to the radiographic signs of ceramic failure or metallosis such as a change of the metal head contour, if an aseptic loosening or severe osteolysis is observed in a THA in which ceramic materials were used near the hip joint. And, when a surgical revisio...Continue Reading

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Citations

Sep 19, 2007·Skeletal Radiology·E J HeffernanP L Munk
Sep 18, 2009·Journal of Biomechanics·Saverio AffatatoAldo Toni
Oct 7, 2008·The Journal of Arthroplasty·Marcus OldenburgXaver Baur
May 6, 2008·Revue de chirurgie orthopédique et réparatrice de l'appareil moteur·G MathieuP Hernigou
Feb 12, 2011·Clinical Orthopaedics and Related Research·Marcel E RoyBrian J Katerberg
Oct 8, 2011·International Journal of Immunopathology and Pharmacology·A Schiavone PanniGiulio Maccauro

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