Results 301 to 310 of about 32,399 (336)
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Der Orthopäde, 1997
Bone cements are used to treat compression fractures, fill bone defects and improve implant fixation in osteoporotic patients through reinforcement of weak bone. When the fracture repair is complete the bone cement ideally should degrade. In general, calcium-phosphate bone cements are biodegradable and can fulfill this temporary function.
I. P. Hoellen +2 more
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Bone cements are used to treat compression fractures, fill bone defects and improve implant fixation in osteoporotic patients through reinforcement of weak bone. When the fracture repair is complete the bone cement ideally should degrade. In general, calcium-phosphate bone cements are biodegradable and can fulfill this temporary function.
I. P. Hoellen +2 more
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Thermal analysis of bone cement polymerisation at the cement–bone interface
Journal of Biomechanics, 2004The two major problems that have been reported with the use of polymethylmethacrylate (PMMA) cement are thermal necrosis of surrounding bone due to the high heat generation during polymerisation and chemical necrosis due to unreacted monomer release. Computer models have been used to study the temperature and monomer distribution after cementation.
M. Stańczyk, van B Bert Rietbergen
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Nondestructive evaluation of bone cement and bone cement/metal interface failure
Journal of Biomedical Materials Research Part B: Applied Biomaterials, 2009AbstractTo quantify the failure mechanisms related to the loosening of cemented hip joint replacements, novel techniques, capable of monitoring, nondestructively, the initiation and progression of failure duringin vitrofatigue tests, were employed. Fatigue testing of model cement and cement‐stem test pieces was monitored using acoustic emission (AE ...
Browne, M., Jeffers, J.R.T., Saffari, N.
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Shrinkage stresses in bone cement
Biomaterials, 2003Shrinkage of bone cement is reported primarily as a consequence of polymerisation, however thermal shrinkage also occurs as a result of its exothermic reaction. It is proposed that the latter effect is important, since it occurs late in the curing cycle at a time when the cement has attained its mechanical properties as a solid, and that residual ...
Orr, John, Dunne, Nicholas, Quinn, J.C.
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The mechanical properties of bone cements
Journal of Medical Engineering & Technology, 1977The mechanical properties of a number of commercially available bone cements have been investigated. Tests were carried out on specimens in compression, in bending and in tension. Using the compression test as a standard, the effects of the following variables were studied: the addition of antibiotics, strain rate, environmental temperature, and age ...
A. J. C. Lee +2 more
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The Preparation of Bone Cement
British Journal of Perioperative Nursing (United Kingdom), 2001In this second in a series of four articles, Rebecca Eveleigh explains why it is essential for bone cement to be properly prepared, mixed and delivered.
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The effect of centrifuging bone cement
The Journal of Bone and Joint Surgery. British volume, 1989We have tested the porosity and fatigue life of five commonly used bone cements: Simplex P, LVC, Zimmer regular, CMW and Palacos R. Tests were conducted with and without centrifugation and with the monomer at room temperature and, except for LVC, at 0 degrees C. We found that the fatigue life of different specimens varied by a factor of nearly 100. It
Dennis W. Burke +5 more
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Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine, 1998
Poly (methylmethacrylate) (PMMA) bone cement, used to fix implants into the bone, produces good surgical results if used correctly. However, prostheses do eventually become loose and the breakdown of the cement mantle is a factor in this failure.
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Poly (methylmethacrylate) (PMMA) bone cement, used to fix implants into the bone, produces good surgical results if used correctly. However, prostheses do eventually become loose and the breakdown of the cement mantle is a factor in this failure.
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International Journal of Nano and Biomaterials, 2010
Polymethylmethacrylate bone cement is a widely utilised material in the field of orthopaedic surgery and specifically total joint arthroplasty. Despite this, its mechanical properties are poorly understood by the end-user and there is controversy over the manner in which the material should be tested and the effects some commonly used techniques have ...
Michael R Whitehouse, Samuel Lewin Evans
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Polymethylmethacrylate bone cement is a widely utilised material in the field of orthopaedic surgery and specifically total joint arthroplasty. Despite this, its mechanical properties are poorly understood by the end-user and there is controversy over the manner in which the material should be tested and the effects some commonly used techniques have ...
Michael R Whitehouse, Samuel Lewin Evans
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Bone Cements and Cementing Technique
2001I Introduction.- II History of Bone Cements.- 2.1 Industrial Development of Bone Cement.- III Properties of Bone Cements.- 3.1 Handling Properties of PMMA Bone Cements.- 3.2 Mechanical Properties of Bone Cements.- 3.3 Mechanical Testing of Palamed.- IV Cementing Technique.- 4.1 Cementing Technique in Total Hip Replacement: Factors Influencing Survival ...
D.W. Murray, G. H. I. M. Walenkamp
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