Migration pattern of cementless press fit cups in the presence of stabilizing screws in total hip arthroplasty

Springer Science and Business Media LLC - Tập 16 Số 3 - Trang 127-132 - 2011
Zilkens, C1, Djalali, S1, Bittersohl, B1, Kälicke, T2, Kraft, CN3, Krauspe, R1, Jäger, M1
1Department of Orthopaedic Surgery, Heinrich-Heine University Medical School, Duesseldorf, Germany
2Department of Orthopaedics and Traumatology, University Hospital "Bergmannsheil", Bochum, Germany
3Department of Orthopaedic-, Trauma- and Handsurgery, Helios Clinic Krefeld, Krefeld, Germany

Tóm tắt

The aim of this study was to evaluate the initial acetabular implant stability and late acetabular implant migration in press fit cups combined with screw fixation of the acetabular component in order to answer the question whether screws are necessary for the fixation of the acetabular component in cementless primary total hip arthroplasty. One hundred and seven hips were available for follow-up after primary THA using a cementless, porous-coated acetabular component. A total of 631 standardized radiographs were analyzed digitally by the "single-film-x-ray-analysis" method (EBRA). One hundred 'and one (94.4%) acetabular components did not show significant migration of more than 1 mm. Six (5.6%) implants showed migration of more than 1 mm. Statistical analysis did not reveal preoperative patterns that would identify predictors for future migration. Our findings suggest that the use of screw fixation for cementless porous- coated acetabular components for primary THA does not prevent cup migration.

Tài liệu tham khảo

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