Ionomer
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Applications of Ionomer glasses
Contract number
BRPR-CT96-0230 Proposal number
BE96-3721
Start date
01-Jan-97 Duration
3 years
RTD programme
Brite-EuRam
Coordinator
Dr P V Hatton

Organisation
The University of Sheffield

Department
Department of Restorative Dentistry
Street
School of Clinical Dentistry
Street
Claremont Crescent
City
Sheffield
Country
UK Postcode
S10 2TA
Telephone
44 114 2717938/2717930 Fax
44 114 2665328
Email
p.v.hatton@sheffield.ac.uk
Web_address
Partner
Associated Dental Products (GB)
Partner
University of Aveiro (P)
Partner
Degussa AG (DE)
Partner
DePuy International (GB)
Partner University of Limerick (IR)
Additional Partner
Molecular Sciences Ltd (GB), Cera-Dynamics Ltd (GB)
Summary
The principal aim of this Basic Research Project is the study of

acid-degradable fluoro-alumino-phospho-silicate glasses and their

phase separation and crystallisation behaviour with the objective of

developing new glass and glass-ceramic materials for application as i)

glass-ceramic inlays based on apatite for dental use (alternatives to

amalgam), ii) high strength castable bone substitutes, iii) bioactive

glazes for medical grade alloys, iv) microporous glasses for industrial

separations of biological macromolecules, and v) photo-machinable

glass-ceramics for opto-electronic applications.
Achievements A range of ionomer glasses have been produced and characterised by
(update April 1999) the University of Limerick. In addition, scale up of glass production has been successfully demonstrated by two more partners. Six glasses have been selected for further study for each of the applications described above and processing conditions are currently being optimised. Tissue culture techniques have confirmed the in vitro biocompatibility of these materials and this work is ongoing. A wide variety of demonstration pieces have been produced that show the potential of apatite-mullite glass-ceramics for use as dental materials and bone substitutes. Key formulations have been protected by patent prior to further exploitation by partners.

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