Pseudotumor in Large Diameter Head Metal-on-metal Total Hip Replacement.

The authors describe a case of a large diameter head metal-on-metal total hip replacement that evolved with an inflammatory pseudotumor formation. The diagnosis was established by magnetic resonance imaging (MRI) with suppression of the metal artifact. The treatment consisted on the resection of the abnormal tissue and on the revision to a ceramic on cross-linked polyethylene hip replacement.

Preliminary analysis on the MD-4(®) plasma-sprayed titanium acetabular component.

Objectives: To evaluate the short-term performance of a type of implant manufactured in Brazil.

Methods: This study analyzed a cohort of 60 patients who underwent implantation of MD-4(®) acetabular components during primary hip arthroplasty procedures performed between January 1, 2010, and August 1, 2012. The patients were studied retrospectively with regard to clinical behavior, stability and radiological osseointegration.