Results 211 to 220 of about 5,384,913 (273)
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2011
♦ Traditionally bearings were made from polyethylene and cobalt chrome. These bearings are still most commonly used for knee replacements. In hip replacements due to osteolysis caused by polyethylene wear alternative material combinations at the bearing surface are used♦ Highly cross linked plastics have been developed and have been shown to reduce ...
Theofilos Karachalios, George Karydakis
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♦ Traditionally bearings were made from polyethylene and cobalt chrome. These bearings are still most commonly used for knee replacements. In hip replacements due to osteolysis caused by polyethylene wear alternative material combinations at the bearing surface are used♦ Highly cross linked plastics have been developed and have been shown to reduce ...
Theofilos Karachalios, George Karydakis
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Metal-on-metal Bearing Surfaces
Journal of the American Academy of Orthopaedic Surgeons, 2009Metal-on-metal bearing couples remain a popular option in total hip arthroplasty and are the only currently available option for surface replacement arthroplasty. In general, the intermediate-term clinical performance of metal-on-metal bearings has been favorable.
Joshua J, Jacobs +5 more
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Clinical Orthopaedics and Related Research, 1999
Despite more than 25 years of clinical experience with ceramic materials as bearing surfaces, their role in modern joint replacement surgery remains to be clearly defined. The two primary materials are alumina and zirconia. The application of these materials is primarily as a femoral head bearing surface against polyethylene, but alumina also is used ...
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Despite more than 25 years of clinical experience with ceramic materials as bearing surfaces, their role in modern joint replacement surgery remains to be clearly defined. The two primary materials are alumina and zirconia. The application of these materials is primarily as a femoral head bearing surface against polyethylene, but alumina also is used ...
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Surface roughness of the proximal and distal bearing surface of mobile bearing total knee prostheses
The Journal of Arthroplasty, 2002Proximal and distal articulations surface roughness measurements were done on 8 mobile bearing knee designs immediately after removal from sterile packaging. Roughness parameters Ra and Rp based on ISO 97, representing mean deviation from the smooth surface line and mean peak to smooth surface line, were recorded using a contact surface profilometer at
P, Chapman-Sheath +4 more
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Optimal bearing and bearing rate estimator using an ambiguity surface
[Proceedings] ICASSP-92: 1992 IEEE International Conference on Acoustics, Speech, and Signal Processing, 1992A method for developing a bearing and bearing rate estimates that have Cramer-Rao bound accuracy near detection levels using a bearing-bearing rate ambiguity surface is presented. The ambiguity surface is generated from averaged line array cross correlation data by integrating according to predefined hypotheses of possible contact motion.
D. E. Ohlms, D. N. Nitka
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Studies in hydronamic thrust bearings III. The parallel surface bearing
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1975Abstract The parallel surface bearing is interesting in that on first sight it completely contradicts the classical Reynolds lubrication theory. Secondly its mode of operation has only recently been capable of detailed explanation. The optical technique, described in the last section offered a precise method of proving that thermal ...
Robinson, C. L., Cameron, A.
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Bearing Surfaces for Total Hip Arthroplasty
Journal of the American Academy of Orthopaedic Surgeons, 2018Metal-on–highly cross-linked polyethylene is considered the preferred bearing surface for conventional total hip arthroplasty because of its safety profile and excellent results in the first 10 to 15 years of use. However, with younger patient age, activity expectations increase, and the life expectancy of patients with total hip arthroplasty also has ...
Paul F, Lachiewicz +2 more
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2016
Tribology is the science and engineering of interacting surfaces in relative motion. Solid surfaces (more specifically, interface of solid/gas or solid/liquid) have complex structures and features.
Ming Qiu +3 more
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Tribology is the science and engineering of interacting surfaces in relative motion. Solid surfaces (more specifically, interface of solid/gas or solid/liquid) have complex structures and features.
Ming Qiu +3 more
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Polyethylene as a Bearing Surface
2000Ultra-high molecular-weight polyethylene (UHM-WPE) is the most commonly used bearing material in total joint replacement. Wear of UHMWPE is a serious clinical problem that limits the longevity of orthopaedic implants. Excessive wear may lead to gross mechanical failure such as fracture and disas-sociation [3] and the release of particulate wear debris ...
J. E. Parr, W. Haggard, H. H. Trieu
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