Stress shielding in bone of a bone-cement interface
نویسندگان
چکیده
منابع مشابه
Experimental micromechanics of the cement-bone interface.
Despite the widespread use of cement as a means of fixation of implants to bone, surprisingly little is known about the micromechanical behavior in terms of the local interfacial motion. In this work, we utilized digital image correlation techniques to quantify the micromechanics of the cement-bone interface of laboratory-prepared cemented total hip replacements subjected to nondestructive, qua...
متن کاملFailure of the cement-bone interface.
We report the early failure, at a mean of 37 months, of 17 femoral prostheses due to aseptic loosening at the cement-bone interface. In every case the prosthesis had been manufactured with a surface coating designed to enhance the strength of the cement-prosthesis interface. It is postulated that improving the bond at the cement-prosthesis interface may transfer increased stress to the cement-b...
متن کاملPorosity reduction in bone cement at the cement-stem interface.
The fatigue failure of bone cement, leading to loosening of the stem, is likely to be one mode of failure of cemented total hip replacements. There is strong evidence that cracks in the cement are initiated at voids which act as stress risers, particularly at the cement-stem interface. The preferential formation of voids at this site results from shrinkage during polymerisation and the initiati...
متن کاملBone-cement interface of the glenoid component: stress analysis for varying cement thickness.
BACKGROUND Although shoulder arthroplasty is an accepted treatment for osteoarthritis, loosening of the glenoid component, which mainly occurs at the bone-cement interface, remains a major concern. Presently, the mechanical effect of the cement mantel thickness on the bone-cement interface is still unclear. METHODS Finite element analysis of a prosthetic scapula was used to evaluate the effec...
متن کاملThermal analysis of bone cement polymerisation at the cement-bone interface.
The 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. In most of these models, however, polymerisati...
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ژورنال
عنوان ژورنال: Medical Engineering & Physics
سال: 2016
ISSN: 1350-4533
DOI: 10.1016/j.medengphy.2016.01.009