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Cortical bone screw fixation in ionically modified apatite cements
Author(s) -
Barralet J. E.,
Duncan C. O.,
Dover M. S.,
Bassett D. C.,
Nishikawa H.,
Monaghan A.,
Gbureck U.
Publication year - 2005
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.30197
Subject(s) - cement , materials science , apatite , cortical bone , calcium phosphate cement , bone cement , fixation (population genetics) , perpendicular , composite material , dental cement , dentistry , biomedical engineering , chemistry , mineralogy , anatomy , medicine , biochemistry , geometry , mathematics , adhesive , layer (electronics) , gene
Abstract Hydroxyapatite cements are used in reconstruction of the face; usually in well‐defined cavities where the cement can be stabilized without the need for internal fixation. A hydroxyapatite cement that could enable screw fixation and some loading therefore has considerable potential in maxillofacial reconstruction. It has been demonstrated recently that water demand of calcium phosphate cements can be reduced by ionically modifying the liquid component. This study investigated the capacity of an ionically modified precompacted apatite cement to retain self‐tapping cortical bone screws. Screw pullout forces were determined in the direction of the screw long axis and perpendicular to it, using cortical bone and polymethylmethacrylate cement as a control. In bending pullout tests, measured forces to remove screws from ionically modified precompacted cement were insignificantly different from cortical bone. However, pullout forces of bone screws from hydroxyapatite cement decreased with aging time in vitro . © 2005 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater