title: Fixation and Wear With Contemporary Acetabular Components and Cross-Linked Polyethylene at 10-Years in Patients Aged 50 and Under.
abstract: We evaluated the mid-term performance of a moderately cross-linked polyethylene THA bearing in younger patients. One hundred consecutive THAs performed in patients 50 years of age and under using the same cementless acetabular component and moderately cross-linked polyethylene were evaluated at minimum 10 year follow-up. At final follow-up 75 patients (89 hips) were living, 7 patients (7 hips) were deceased and 4 patients (4 hips) were lost to follow-up. Average Tegner and UCLA scores were 3.7 and 5.8, respectively. Average steps per year were 1.84 million. The average linear wear rate was 0.05 mm/y and steady state wear rate was 0.033 mm/y. There was no detectable osteolysis. Minimum 10 year follow-up demonstrated durable fixation and reduced wear (P<0.001) when compared to our historical controls.
authors.affiliation: University of Iowa, Iowa City, Iowa.
authors.forename: Justin J
authors.initials: JJ
authors.lastname: Greiner
authors.affiliation: University of Iowa, Iowa City, Iowa.
authors.forename: John J
authors.initials: JJ
authors.lastname: Callaghan
authors.affiliation: University of Iowa, Iowa City, Iowa.
authors.forename: Nicholas A
authors.initials: NA
authors.lastname: Bedard
authors.affiliation: University of Iowa, Iowa City, Iowa.
authors.forename: Steve S
authors.initials: SS
authors.lastname: Liu
authors.affiliation: University of Iowa, Iowa City, Iowa.
authors.forename: Yubo
authors.initials: Y
authors.lastname: Gao
authors.affiliation: Des Moines Orthopaedic Surgeons, West Des Moines, Iowa.
authors.forename: Devon D
authors.initials: DD
authors.lastname: Goetz
mesh_terms: D000077:Acetabulum / Q000601:surgery*; D000328:Adult; D000367:Age Factors; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation*; D015992:Body Mass Index; D001847:Bone Diseases / Q000601:surgery*; D015331:Cohort Studies; D003432:Cross-Linking Reagents / Q000737:chemistry; D005260:Female; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D020959:Polyethylene / Q000737:chemistry*; D011475:Prosthesis Failure; D016138:Walking; D055815:Young Adult
chemical_list: D003432:Cross-Linking Reagents; D020959:Polyethylene
keywords: activity monitor; cross-linked polyethylene; total hip arthroplasty; wear; younger age