title: The Balgrist hip socket for fixation without cement: analysis of 387 primary total hip replacements.
abstract: The results of 387 primary hip arthroplasties in which an uncemented Balgrist hip socket had been used in 346 patients were reviewed after a maximum of six years. The mean age of the patients at the time of operation was 54.3 years. Acetabular deficiency according to the AAOS classification was found in 21% of these primary arthroplasties. Three acetabular components (0.77%) had been revised. Using Kaplan-Meier survivorship analysis, with the use of prosthesis revision as the endpoint of failure, the survival rate at five years was found to be 99%. Four acetabular components (1%) had migrated and lysis of bone around the component in zone III occurred in one patient (0.26%). The data suggest that the unique socket design of the Balgrist hip socket (consisting of two tapered parts: an expansive outer titanium-alloy split ring and an insert of polyethylene) provides very satisfactory clinical results with various acetabular defects.
authors.affiliation: Department of Orthopaedics, University of Zurich, Switzerland.
authors.forename: R
authors.initials: R
authors.lastname: Hauser
authors.forename: H A
authors.initials: HA
authors.lastname: Jacob
authors.forename: A
authors.initials: A
authors.lastname: Schreiber
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005069:Evaluation Studies as Topic; D005260:Female; D005500:Follow-Up Studies; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000473:pathology; D006622:Hip Prosthesis / Q000295:instrumentation / Q000379:methods; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000503:physiopathology*; D011379:Prognosis; D011474:Prosthesis Design; D011475:Prosthesis Failure; D011859:Radiography