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Fatigue performance...
Fatigue performance of a high-strength, degradable calcium phosphate bone cement
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- Ajaxon, Ingrid (författare)
- Uppsala universitet,Tillämpad materialvetenskap,Material i medicin
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- Holmberg, Anders (författare)
- Uppsala universitet,Tillämpad materialvetenskap,Material i medicin
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- Öhman, Caroline (författare)
- Uppsala universitet,Tillämpad materialvetenskap,Material i medicin
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- Persson, Cecilia (författare)
- Uppsala universitet,Tillämpad materialvetenskap,Material i medicin
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(creator_code:org_t)
- ELSEVIER SCIENCE BV, 2018
- 2018
- Engelska.
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Ingår i: Journal of The Mechanical Behavior of Biomedical Materials. - : ELSEVIER SCIENCE BV. - 1751-6161 .- 1878-0180. ; 79, s. 46-52
- Relaterad länk:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Calcium phosphate cements (CPCs) are clinically used as injectable materials to fill bone voids and to improve hardware fixation in fracture surgery. In vivo they are dynamically loaded; nonetheless little is known about their fatigue properties. The aim of this study was to, for the first time, investigate the fatigue performance of a high strength, degradable (brushitic) CPC, and also evaluate the effect of cement porosity (by varying the liquid to powder ratio, L/P) and the environment (air at room temperature or in a phosphate buffered saline solution, PBS, at 37 degrees C) on the fatigue life. At a maximum compressive stress level of 15 MPa, the cements prepared with an L/P-ratio of 0.22 and 0.28 ml/g, corresponding to porosities of approximately 12% and 20%, had a 100% probability of survival until run-out of 5 million cycles, in air. When the maximum stress level, or the L/P-ratio, was increased, the probability of survival decreased. Testing in PBS at 37 degrees C led to more rapid failure of the specimens. However, the high-strength cement had a 100% probability of survival up to approximately 2.5 million cycles at a maximum compressive stress level of 10 MPa in PBS, which is substantially higher than some in vivo stress levels, e.g., those found in the spine. At 5 MPa in PBS, all specimens survived to run-out. The results found herein are important if clinical use of the material is to increase, as characterisation of the fatigue performance of CPCs is largely lacking from the literature.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Medicinteknik -- Medicinsk material- och protesteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Medical Engineering -- Medical Materials (hsv//eng)
Nyckelord
- Bone cement
- Calcium phosphate
- Brushite
- Fatigue
- Compression
- Porosity
- Mechanical properties
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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