Two Cases of Metallosis from Metal‐on‐Polyethylene Total Hips: An Emerging Problem. Issue 4 (20th November 2014)

• Record Type: Journal Article
• Authors: Kao, Cyrus; Scalettar, Raymond; Bunning, Robert D.
• Is Part Of: PM&R. Volume 7:Issue 4(2015)
• Page Start: 447
• Page End: 450
• Publication Date: 2014-11-20
• Subjects: Medical rehabilitation -- Periodicals; Physical therapy -- Periodicals; Physical Therapy Modalities -- Periodicals; 615.5
• DOI: 10.1016/j.pmrj.2014.11.004
• Languages: English
• ISSNs: 1934-1482

Abstract

Abstract: This report describes 2 cases of metallosis from metal‐on‐polyethylene total hip replacements. Case 1 involved a Stryker rejuvenate implant, which has since been recalled. This patient had minimal symptoms, an elevated cobalt level, and loosening. The patient in case 2 had a Dupuys Pinnacle system, with symptoms of weakness, rash, and hip pain. Abnormal laboratory values include elevated sedimentation rate, C‐reactive protein, creatinine, cobalt, and decreased hematocrit. Magnetic resonance imaging revealed synovial thickening and extracapsular edema. Although metallosis is a well‐established complication of metal‐on‐metal implants, emerging data reveal that it also may be a problem in non–metal‐on‐metal implants such as either metal‐on‐polyethylene or ceramic‐on‐polyethylene implants, perhaps related to modular corrosion.