Press-fit acetabular cup fixation: Principles and testing
نویسندگان
چکیده
منابع مشابه
Press-fit acetabular cup fixation: principles and testing.
Pre-clinical testing of the fixation of press-fit acetabular components of total hip prostheses relies on cadaver or synthetic bone, but the properties and geometry of bone models differ from those of physiological bone. Cup designs use varied mechanisms for initial stability in bone; therefore, using different analogues and tests is appropriate. Press-fit cup stability was tested in the follow...
متن کاملAcetabular component deformation with press-fit fixation.
Acetabular component deformation secondary to forces encountered during insertion is a potential consequence of the press-fit technique. This study characterized the stiffness of Pinnacle 100 cups (DePuy, Warsaw, Ind) via mechanical testing and used this information with intraoperative measurements of cup deformation to calculate the in vivo forces acting on cups inserted during hip arthroplast...
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The need for supplementary screw fixation in acetabular revisions is still widely debated. We carried out 439 acetabular revisions over an eight-year period. In 171 hips with contained or small segmental defects, the Morscher press-fit cup was used. These revisions were followed prospectively. No screws were used for additional fixation. A total of 123 hips with a mean follow-up of 7.4 years (5...
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INTRODUCTION: Squeaking of hard-on-hard hip joint bearings has recently become a concern in modern total hip arthroplasty due to its high impact on the quality of life of the patient [1]. Many factors such as malpositioning of implant play a role in the arisal of this phenomenon [2]. The probability of the excitation of audible vibrations is also related to prosthesis design [3]. In particular ...
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INTRODUCTION The total hip replacement is a common surgical procedure in orthopaedics. However, the acetabular cup loosening is one of the major failure modes of cementless acetabular cup. Many researches point out that an unstable cup would induce a large micromotion under dynamic loading. This large micromotion would reduce the bone ongrowth on the cementless cup surface and prohibit the osse...
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ژورنال
عنوان ژورنال: Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine
سال: 1999
ISSN: 0954-4119,2041-3033
DOI: 10.1243/0954411991534780