Bone cement compositions having fiber-reinforcement and/or...

A - Human Necessities – 61 – L

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Details

A61L 27/46 (2006.01) A61L 24/00 (2006.01) A61L 27/42 (2006.01) A61L 27/50 (2006.01)

Patent

CA 2539751

The present invention relates in general to implantable compositions, and method for preparing same, containing a calcium salt-containing component, optionally demineralized bone, a plurality of discrete fibers, optionally a flow additive, and optionally continuous reinforcing fibers or an array of organized fibers in the form of mesh. Advantageously, the discrete fibers have a specific aspect ratio (length/diameter) from about 50:1 to about 1000:1. The addition of a small amount of discrete fibers and/or the continuous reinforcing fibers or fiber mesh can cause drastic increases in certain mechanical properties including flexural strength, flexural strength, flexural toughness, and/or screw pullout strength.

De manière générale, la présente invention a trait à des compositions implantables, et à leur procédé de préparation, comprenant un constituant de calcium contenant du sel, éventuellement de l'os déminéralisé, une pluralité de fibres distinctes, éventuellement un additif d'écoulement, et éventuellement des fibres continues de renfort ou une matrice de fibres organisées sous la forme d'un réseau. De manière avantageuse, les fibres distinctes présente un rapport de forme (longueur/diamètre) déterminé d'environ 50:1 à environ 1000:1. L'ajout d'une petite quantité de fibres distinctes et/ou de fibres de renfort continues ou de réseau de fibres peut entraîner des améliorations considérables dans certaines propriétés mécaniques y compris la résistance à la flexion, la ténacité en flexion, et/ou la résistance à l'arrachage des vis.

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