Engineered scaffolds for intervertebral disc repair and...

A - Human Necessities – 61 – F

Patent

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A61F 2/30 (2006.01) A61F 2/38 (2006.01) A61F 2/44 (2006.01) G06F 17/50 (2006.01)

Patent

CA 2671159

Methods for the engineering and preparation of intervertebral disc repair scaffolds and articulating joint repair scaffolds are disclosed. The methodology utilizes either magnetic resonance images or combined magnetic resonance and computed tomography images as a template for creating either the intervertebral scaffold or the joint repair scaffold (e.g., osteochondral scaffold) with fixation to the underlying bone. The disc scaffold design may include an outer annulus that may contain desired structures and a central nucleus pulposus region that could either contain a designed microstructure or a contained hydrogel. The osteochondral scaffold may include a bone compartment interface with a cartilage compartment. The bone compartment may interface with a cutout portion of the bone through fixation components. Different microstructure designs may be created for the bone and cartilage compartment to represent desired mechanical and mass transport properties. The scaffolds are designed with a microstructure that controls elastic and permeability property distribution within the scaffold.

L'invention porte sur des méthodes de conception et préparation de structures de réparation de disque intervertébraux et d'éléments d'articulations. La méthodologie utilise soit des images de résonance magnétiques ou de tomodensitométrie comme modèles pour créer lesdites structures (par exemple une structure ostéochondrale) avec la fixation à l'os sous-jacent. La conception de la structure d'un disque peut comprendre un annulus extérieur qui peut contenir des éléments désirables et une zone de noyau central pulpeux pouvant contenir soit une microstructure soit un hydrogel. La structure ostéochondrale peut comporter une interface entre un compartiment osseux et un compartiment de cartilage. Le compartiment osseux peut servir d'interface avec une partie découpée de l'os par l'intermédiaire de composants de fixation. Différentes conceptions de microstructures peuvent être créées pour les compartiments de l'os et du cartilage afin de représenter les propriétés mécaniques et de transport de masse désirées. Les structures comportent une microstructure commandant la distribution des propriétés d'élasticité et de perméabilité à l'intérieur de la structure.

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