RESEARCH ARTICLE
Acetabular Component Anteversion in Primary and Revision Total Hip Arthroplasty: An Observational Study
Olav Reikerås*, 1, Ragnhild B. Gunderson2
Article Information
Identifiers and Pagination:
Year: 2013Volume: 7
First Page: 600
Last Page: 604
Publisher ID: TOORTHJ-7-600
DOI: 10.2174/1874325001307010600
Article History:
Received Date: 5/3/2013Revision Received Date: 18/6/2013
Acceptance Date: 23/6/2013
Electronic publication date: 4 /10/2013
Collection year: 2013

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.5/) which permits unrestrictive use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Purpose:
In a prospective manner to evaluate the range of acetabular component anteversion actually achieved by the use of a cup positioner in cementless revision and primary THA.
Methods:
We operated 71 patients with cementless primary THA, and 26 patients with cementless acetabular revision surgery. We aimed to obtain cup anteversion of 10 to 30° with an impactor-positioner. In all cases we used elevated liners and a ceramic head with diameter 28. At 3 months postoperatively the component versions were measured using CT with the patient in supine position.
Results:
The acetabular component version in the primary hips ranged from 28° of retroversion to 42° of anteversion with a mean of 17.4 ± 14.0°, while the cup version in the revision hips ranged from 4° of retroversion to 32° of anteversion with a mean of 15.0 ± 9.6°(p=0.427). The anteversion of 40 (56%) of the primary acetabular components were within the target zone of 10 to 30°, while 19 (27%) were below the target zone and and 12 (17%) were above the target range. The anteversion of 19 (73%) of the revision acetabular components were within the target zone, while 6 (23%) were below the target zone and 1 (4%) were above the target range. The differences in distribution between the primary and revision operations were not significant (p=0.183).
Conclusions:
The intraoperative estimation of acetabular anteversion by free hand technique in many cases was not within the intended range of 10 to 30° in either primary or revision THA and with no differences between the two series