Objective
Calcium phosphate cements are in clinical use for filling non-load bearing bone defects in crania- andmaxiofacial surgery. Two types of cements are distinguishable: cement formed at pH values lower than form brushier (DCPD) and above pH values of 4.2 they form hydroxyapatite (HA), the mineral component of bone and teeth. Cements are thermodynamically non-restorable due to the stability of HA under physiological conditions. Degradation is only possible by acid producing bone remodelling cells (osteoclasts) and is limited to the surface since cells cannot penetrate the cement. In contrast, brushier cements areresorbable under physiological conditions, because brushier has a much higher solubility product at pH7.4 compared to HA. This has been demonstrated in vivo. Up to now, no commercial brushier bone cements are available for clinical use, largely because of its comparatively low mechanical strength. The rate of crystal growth rate of brushier is 500 times that offhand and therefore these cements set very rapidly. Compressive strengths of brushier cements reported in literature are lower than 10 Map and setting times can just be increased to values of 3-5 minutes by these of retardants at the price of further reduction in the already low mechanical properties. Furthermore, unrelated components can lead to a low pH in the implant site, which raises toxicity concerns in some implantation sites, e.g. the spine. Clearly however if mechanical properties can be improved brushier cements will offer the substantial advantage of being restorable and hence replaceable by new bone. The overall aim of this project will be to investigate the powder physics of this cement system in order that mechanical performance and handling characteristics are improved. Surface charge modifiers and liquefiers will be used to further enhance these improvements.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- engineering and technology materials engineering crystals
- medical and health sciences clinical medicine surgery
- natural sciences chemical sciences inorganic chemistry alkaline earth metals
- engineering and technology industrial biotechnology biomaterials
- medical and health sciences medical biotechnology implants artificial bone
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Keywords
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
FP6-2002-MOBILITY-5
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Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
BIRMINGHAM
United Kingdom
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.