N
Patient 1
THE PURPOSE OF THIS INVESTIGATION WAS TO EXAMINE THE AS-RECEIVED COMPONENTS. THE RETURNED HIP STEM, CERAMIC FEMORAL HEAD, ACETABULAR LINER, AND REFLECTION ACETABULAR SHELL WERE EXAMINED VISUALLY. NO DESTRUCTIVE TESTING WAS CARRIED OUT. THE STEM HAD SIGNS OF BURNISHING AND FRETTING ALONG THE LENGTH OF THE STEM. THE CERAMIC FEMORAL HEAD HAD SIGNS OF METAL TRANSFER AND MATERIAL REMOVAL. THE REFLECTION ACETABULAR SHELL HAD SIGNS OF BURNISHING ON THE TAPER LOCKING SURFACE WHICH WAS LIKELY DUE TO CONTACT WITH CERAMIC FEMORAL HEAD OR THE HIP STEM FOLLOWING THE FRACTURE OF THE LINER. THE CERAMIC ACETABULAR LINER WAS FRACTURED IN TWO PIECES AND A PORTION OF THE RIM WAS MISSING FROM ONE OF THE FRAGMENTS. IT IS UNCLEAR THE CAUSE OF THE FRACTURED LINER.