Method for repair of cartilage lesions
First Claim
Patent Images
1. A method for repair of cartilage lesions, said method comprising steps:
- a) preparing a porous support matrix containing a plurality of pores having a pore size from about 50 to about 500 μ
m, wherein said matrix is prepared as a porous sponge, porous scaffold, porous honeycomb or porous honeycomb-like lattice;
b) seeding said support matrix with chondrocytes isolated from a donor and suspended in a collagenous solution or collagenous gel;
c) applying a constant or cyclic hydrostatic pressure to the support matrix seeded with chondrocytes from step (b) for a period from about one hour to about 30 days followed by a resting period at a static atmospheric pressure for about one day to about 60 days,wherein said hydrostatic pressure is from about 0.01 MPa to about 10 MPa above atmospheric pressure;
d) pre-treating a cartilage lesion by depositing a layer of a biologically acceptable bottom sealant into said lesion before implanting said seeded support matrix from step c) therein;
e) implanting said seeded support matrix from step c) into said pre-treated lesion of step d); and
f) depositing a layer of a biologically acceptable top sealant over said seeded support matrix from step c) implanted into said lesion.
3 Assignments
0 Petitions
Accused Products
Abstract
A method for treatment of injured, damaged, diseased or aged articular cartilage using neo-cartilage constructs implanted into a joint cartilage lesion in situ. The implantation of the construct initiates and achieves incorporation of neo-cartilage into a native surrounding cartilage including a formation of a new superficial cartilage layer overgrowing and sealing the lesion in the joint cartilage.
-
Citations
13 Claims
-
1. A method for repair of cartilage lesions, said method comprising steps:
-
a) preparing a porous support matrix containing a plurality of pores having a pore size from about 50 to about 500 μ
m, wherein said matrix is prepared as a porous sponge, porous scaffold, porous honeycomb or porous honeycomb-like lattice;b) seeding said support matrix with chondrocytes isolated from a donor and suspended in a collagenous solution or collagenous gel; c) applying a constant or cyclic hydrostatic pressure to the support matrix seeded with chondrocytes from step (b) for a period from about one hour to about 30 days followed by a resting period at a static atmospheric pressure for about one day to about 60 days, wherein said hydrostatic pressure is from about 0.01 MPa to about 10 MPa above atmospheric pressure; d) pre-treating a cartilage lesion by depositing a layer of a biologically acceptable bottom sealant into said lesion before implanting said seeded support matrix from step c) therein; e) implanting said seeded support matrix from step c) into said pre-treated lesion of step d); and f) depositing a layer of a biologically acceptable top sealant over said seeded support matrix from step c) implanted into said lesion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
Specification