[Is the high hip center a solution for revision operation in acetabulum loosening of the hip prosthesis?].
In each of 20 anatomical specimens with an acetabular defect (Paprosky type 3b) we implanted an acetabular component in the position of a high hip center. We evaluated the interface area and the migration of the hip center in relation to the normal physiological hip rotation center. The interface area showed a wide interindividual range between 1049 mm2 and 527 mm2. This represented a percentage coverage of the hip component by between 44% and 22%, with an average of 31%. The vertical migration ranged between 13 mm and 35 mm, with a consecutive lateralization in all specimens. This lateral migration ranged from 10 mm to 30 mm. Besides this, there was also significant migration in the sagittal plane, with anterior migration by between 5 mm and 25 mm. On the basis of our findings, we do not recommended the implantation of an acetabular component in the position of a high hip center.
Jerosch
J
J
Klinik und Poliklinik für Allgemeine Orthopädie, Westfälischen Wilhelms-Universität Münster.
Fuchs
S
S
Steinbeck
J
J
Stechmann
J
J
D000077:Acetabulum / Q000601:surgery*; D001696:Biomechanical Phenomena; D006622:Hip Prosthesis; D006801:Humans; D008422:Materials Testing; D011183:Postoperative Complications / Q000601:surgery*; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012086:Reoperation
Ist das hohe Hüftzentrum eine Lösungsmöglichkeit für die Revisionsoperation bei Pfannenlockerungen der Hüftendoprothese?