Failure of the Ring polyethylene uncemented acetabular cup
نویسندگان
چکیده
منابع مشابه
Acute polyethylene fracture in an uncemented acetabular cup.
The smaller acetabular components used in total hip replacement may have a polyethylene liner that is too thin, resulting in higher polyethylene stress and an increased potential for wear. The authors present a case that highlights the problem of acute polyethylene fracture. To compensate for the thinness of the polyethylene, the authors recommend the use of a smaller head size to allow polyeth...
متن کاملThe Ring uncemented polyethylene cup in the abnormal acetabulum.
The results of using the Ring uncemented polyethylene-to-metal (UPM) prosthesis in patients with protrusio acetabuli or dysplasia are reported. Fifty-four cases of protrusio were analysed and a modified method of measuring the deformity is described; after operation, remodelling of the medial wall had improved, on average, by 29.6%. For the dysplastic acetabulum the main difficulty is the lack ...
متن کاملCatastrophic failure of the polyethylene liner of uncemented acetabular components.
Ten cases are described of catastrophic failure of the polyethylene liner of three different designs of uncemented acetabular component. Failure occurred as a result of either 'wearthrough' to the metal backing, liner fracture or a combination of both, at a mean of 4.6 years after implantation (2 to 7.6). At revision there was metallosis in all hips and osteolysis of the femur or the pelvis in ...
متن کاملPolyethylene wear in uncemented acetabular components.
We measured polyethylene wear in 231 porous-coated uncemented acetabular cups. We divided the hips into two groups according to the fixation of the femoral component, by cementing (n = 97) or press-fit (n = 134). Follow-up was from three to five years. The patients in two sub-groups were matched for weight, diagnosis, sex, age and length of follow-up. The linear wear rate of cups articulated wi...
متن کاملBackside volumetric change in the polyethylene of uncemented acetabular components.
Polyethylene wear of acetabular components is a key factor in the development of periprosthetic osteolysis and wear at the articular surface has been well documented and quantified, but fewer data are available about changes which occur at the backside of the liner. At revision surgery for loosening of the femoral component we retrieved 35 conventional modular acetabular liners of the same desi...
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ژورنال
عنوان ژورنال: The Journal of Bone and Joint Surgery. British volume
سال: 1995
ISSN: 0301-620X,2044-5377
DOI: 10.1302/0301-620x.77b4.7615597