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Preparation and properties of macroporous brushite bone cements

✍ Scribed by G. Cama; F. Barberis; R. Botter; P. Cirillo; M. Capurro; R. Quarto; S. Scaglione; E. Finocchio; V. Mussi; U. Valbusa

Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
517 KB
Volume
5
Category
Article
ISSN
1742-7061

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✦ Synopsis

In the present work a macroporous brushite bone cement for use either as an injected or mouldable paste, or in the shape of preformed grafts, has been investigated. Macropores have been introduced by adding to the powder single crystals of mannitol which worked as a porogen. The size of the crystals was in the range of 250-500microm in diameter, suitable for cell infiltration, with a shape ratio between 3 and 6. From compression tests on cylindrical samples an elastic modulus in the range 2.5-4.2GPa and a compressive strength in the range 17.5-32.6MPa were obtained for a volume fraction of macropores varying between 15 and 0%. Thus the compressive strength exceeded in all tests the maximum value currently attributed to cancellous bone.

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