title: The influence of acetabular inclination angle on the penetration of polyethylene and migration of the acetabular component: a prospective, radiostereometric study on cemented acetabular components.
abstract: In this prospective study we studied the effect of the inclination angle of the acetabular component on polyethylene wear and component migration in cemented acetabular sockets using radiostereometric analysis. A total of 120 patients received either a cemented Reflection All-Poly ultra-high-molecular-weight polyethylene or a cemented Reflection All-Poly highly cross-linked polyethylene acetabular component, combined with either cobalt-chrome or Oxinium femoral heads. Femoral head penetration and migration of the acetabular component were assessed with repeated radiostereometric analysis for two years. The inclination angle was measured on a standard post-operative anteroposterior pelvic radiograph. Linear regression analysis was used to determine the relationship between the inclination angle and femoral head penetration and migration of the acetabular component. We found no relationship between the inclination angle and penetration of the femoral head at two years' follow-up (p = 0.9). Similarly, our data failed to reveal any statistically significant correlation between inclination angle and migration of these cemented acetabular components (p = 0.07 to p = 0.9).
authors.affiliation: Haukeland University Hospital, Jonas Liesvei 65, Bergen 5021, Norway. tkad@helse-bergen.no
authors.forename: T
authors.initials: T
authors.lastname: Kadar
authors.forename: O
authors.initials: O
authors.lastname: Furnes
authors.forename: A
authors.initials: A
authors.lastname: Aamodt
authors.forename: K
authors.initials: K
authors.lastname: Indrekvam
authors.forename: L I
authors.initials: LI
authors.lastname: Havelin
authors.forename: K
authors.initials: K
authors.lastname: Haugan
authors.forename: B
authors.initials: B
authors.lastname: Espehaug
authors.forename: G
authors.initials: G
authors.lastname: Hallan
mesh_terms: D000077:Acetabulum / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D002484:Cementation; D005260:Female; D005270:Femur Head / Q000000981:diagnostic imaging / Q000473:pathology; D005548:Foreign-Body Migration / Q000209:etiology / Q000473:pathology; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011095:Polyethylenes; D011446:Prospective Studies; D011474:Prosthesis Design; D011475:Prosthesis Failure / Q000209:etiology*; D059869:Radiostereometric Analysis / Q000379:methods
chemical_list: D011095:Polyethylenes