Failure of acetabular cups
نویسندگان
چکیده
منابع مشابه
Failure of dual radius hydroxyapatite-coated acetabular cups
INTRODUCTION Many kind of hydroxyapatite-coated cups were used, with favorable results in short term studies; it was supposed that its use could improve osteointegration of the cup, enhancing thus stability and survivorship. The purpose of this study is to analyze the long term behavior of the hemispheric HA coated, Dual Radius Osteonics cup and to discuss the way of failure through the exam of...
متن کاملFailure of acetabular cups influenced by marker wire anchorage.
Failure of an acetabular cup is uncommon and has been attributed to wear or creep, trauma or bony irregularities in the acetabulum. We report ten cases in which fracture of the cup occurred at the site of drill holes used to anchor the marker wire. The role of such indentations as stress raisers has not been previously reported; we suggest that deep indentations or grooves should not be placed ...
متن کاملSurvival of uncemented acetabular monoblock cups
BACKGROUND AND PURPOSE Monoblock acetabular cups represent a subtype of uncemented cups with the polyethylene liner molded into a metal shell, thus eliminating-or at least minimizing-potential backside wear. We hypothesized that the use of monoblock cups could reduce the incidence of osteolysis and aseptic loosening, and thus improve survival compared to modular designs. PATIENTS AND METHODS ...
متن کاملPolyethylene wear from retrieved acetabular cups.
Laboratory wear testing of ultra high molecular weight polyethylene from 12 Charnley acetabular cups, removed after periods of up to 17.5 years showed that the large patient-to-patient variations in clinical penetration rate cannot be explained by batch-to-batch variation in the wear resistance of the material. Nor was there any evidence of a time-dependent degradation in wear resistance of the...
متن کاملA Powered Technique for Inserting Acetabular Cups
This work focused to investigate the use of a powered automatic technique to insert acetabular cup implants. The use of a percussion hammer tool as a surgical instrument to insert acetabular cup implants was investigated in current work. Pull-out, lever-out and torque tests were carried out on cup implants inserted into test block specimens of polyurethane (PU) using specifically designed exper...
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ژورنال
عنوان ژورنال: The Journal of Bone and Joint Surgery. British volume
سال: 1992
ISSN: 0301-620X,2044-5377
DOI: 10.1302/0301-620x.74b3.1587909