title: [Hip endoprosthesis shaft fractures - a clinical and technological material study].
abstract: This paper begins with a discussion of purely clinical considerations concerning fractures of hip prosthesis shafts, based on findings in 19 cases treated in the University Orthopedic Clinics of Essen and Lübeck. A gradual increase in pain following stress is the principal symptom, although acute pain is not typical. In radiological diagnosis, which is indispensable, the fractures, which are initially often merely hairline cracks, must be looked for. In the patient collective analyzed, the high percentage of implantation defects was striking; this is a factor which increases the risk of fracture because it leads to loosening of the prosthesis. The authors also report on a materials investigation carried out on 18 broken prosthesis shafts. The investigation revealed that in the majority of cases loosening of the prosthesis was the decisive factor leading to the fracture; only in 3 cases was the fracture basically attributable to a fault in the material or in production.
mesh_terms: D002858:Chromium Alloys / Q000032:analysis; D004868:Equipment Failure; D005260:Female; D005264:Femoral Fractures / Q000000981:diagnostic imaging* / Q000209:etiology; D050723:Fractures, Bone; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000000981:diagnostic imaging; D011859:Radiography
chemical_list: D002858:Chromium Alloys
vernacular_title: Hüftendoprothesenschaft-frakturen - eine klinische und werkstofftechnische Untersuchung.