title: Results of the cementless Mallory-Head primary total hip arthroplasty: a 5 to 7 year review.
abstract: We reviewed the results of 172 plasma-sprayed, titanium primary total hip arthroplasties inserted without cement and followed 5 to 7 years. Hips were replaced for a wide range of diagnoses and patient ages. No femoral components had been revised nor were any considered unstable. Clinical results have been excellent; 88% of hips had either no or slight amount of pain and only 5% of patients had thigh pain when specifically asked. Radiographically, this femoral component achieved stability after an initial subsidence in 9% of cases. Extensive femoral bone resorption was rare, and distal cortical hypertrophy was commonly seen. Pelvic osteolysis occurred in 16 (9%) cases and was considered major in 10 of these. It was the cause of failure of 3 acetabular components. Femoral endosteal lysis was not observed. We concluded that mechanical stability of the Mallory-Head titanium total hip prostheses is excellent. However, significant pelvic osteolysis had occurred commonly with this implant design, and will continue to pose major reconstructive problems in the future.
authors.affiliation: University of Western Ontario, London, Canada.
authors.forename: B D
authors.initials: BD
authors.lastname: Mulliken
authors.forename: R B
authors.initials: RB
authors.lastname: Bourne
authors.forename: C H
authors.initials: CH
authors.lastname: Rorabeck
authors.forename: N
authors.initials: N
authors.lastname: Nayak
mesh_terms: D000328:Adult; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000601:surgery; D005260:Female; D006621:Hip Joint / Q000000981:diagnostic imaging; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000601:surgery; D010014:Osteolysis / Q000209:etiology; D011095:Polyethylenes; D011474:Prosthesis Design; D011475:Prosthesis Failure; D011859:Radiography; D012086:Reoperation; D014025:Titanium; D016896:Treatment Outcome
chemical_list: D011095:Polyethylenes; D014025:Titanium