title: Fracture of polyethylene acetabular cups. Report of two cases.
mesh_terms: D000077:Acetabulum / Q000000981:diagnostic imaging; D000368:Aged; D006621:Hip Joint / Q000000981:diagnostic imaging; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008855:Microscopy, Electron, Scanning; D008875:Middle Aged; D008970:Molecular Weight; D010003:Osteoarthritis / Q000601:surgery; D011095:Polyethylenes; D011183:Postoperative Complications / Q000601:surgery*; D011859:Radiography; D013314:Stress, Mechanical
chemical_list: D011095:Polyethylenes