Porous extracellular matrix scaffold and method
First Claim
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1. A method of making an implantable scaffold for repairing or regenerating body tissue, the method comprising the steps of:
- suspending pieces of a naturally occurring extracellular matrix material in a liquid; and
freeze drying the pieces of naturally occurring extracellular matrix material and the liquid.
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Abstract
A method of making an implantable scaffold for repairing damaged or diseased tissue includes the step of suspending pieces of an extracellular matrix material in a liquid. The extracellular matrix material and the liquid are formed into a mass. The liquid is subsequently driven off so as to form interstices in the mass. Porous implantable scaffolds fabricated by such a method are also disclosed.
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Citations
99 Claims
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1. A method of making an implantable scaffold for repairing or regenerating body tissue, the method comprising the steps of:
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suspending pieces of a naturally occurring extracellular matrix material in a liquid; and
freeze drying the pieces of naturally occurring extracellular matrix material and the liquid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of making an implantable scaffold for repairing or regenerating body tissue, the method comprising the steps of:
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suspending pieces of a naturally occurring extracellular matrix material in a liquid;
forming the pieces of the naturally occurring extracellular matrix and the liquid into a mass; and
driving off the liquid so as to form interstices in the mass. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. An implantable scaffold for repairing or regenerating body tissue, comprising a porous body which is prepared by a process comprising the steps of:
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suspending pieces of a naturally occurring extracellular matrix material in a liquid, and freeze drying the naturally occurring extracellular matrix material and the liquid. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. An implantable scaffold for repairing or regenerating body tissue, comprising:
- porous body which is prepared by a process comprising the steps of;
suspending pieces of a naturally occurring extracellular matrix material in a liquid, forming the pieces of the extracellular matrix and the liquid into a mass, and driving off the liquid so as to form interstices in the mass. - View Dependent Claims (31, 32, 33, 34, 35, 36)
- porous body which is prepared by a process comprising the steps of;
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37. An implantable scaffold for repairing or regenerating body tissue, the scaffold comprising:
a porous body of naturally occurring extracellular matrix pieces interconnected to define an interior surface having a three-dimensional topography of irregular shape. - View Dependent Claims (38, 39, 40, 41, 42)
- 43. An implantable device for repairing or regenerating body tissue, the device comprising a three-dimensional-open cell foam comprising a plurality of interconnected pores defining three-dimensional interconnected passageways having irregular shapes, at least part of the foam comprising naturally occurring bioremodelable collagenous tissue matrix.
- 52. An implantable device for repairing or regenerating body tissue, the device comprising a porous reticulated body of naturally occurring bioremodelable collagenous tissue matrix.
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59. A method of making an implantable device for repairing or regenerating body tissue, the method comprising the steps of:
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providing a naturally occurring extracellular matrix material in a raw form;
comminuting the raw naturally occurring extracellular matrix in the presence of a liquid to form a slurry of naturally occurring extracellular matrix; and
lyophilizing the slurry of naturally occurring extracellular matrix to form an open cell foam of naturally occurring extracellular matrix. - View Dependent Claims (60, 61)
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62. A method of making an implantable scaffold for repairing or regenerating body tissue, the method comprising the steps of:
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providing a naturally occurring bioremodelable collagenous tissue matrix in a raw form;
comminuting the raw naturally occurring bioremodelable collagenous tissue matrix to form cohesive pieces of naturally occurring bioremodelable collagenous tissue matrix; and
lyophilizing the cohesive pieces of naturally occurring bioremodelable collagenous tissue matrix to form a reticulated foam of naturally occurring bioremodelable collagenous tissue matrix. - View Dependent Claims (63, 64)
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65. A method of making an implantable scaffold for repairing or regenerating body tissue, the method comprising the steps of:
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providing a extracellular matrix material derived from tissue selected from the group consisting of;
small intestine submucosa, stomach submucosa, bladder submucosa, respiratory submucosa, alimentary submucosa, genital submucosa, and liver basement membrane;
physically comminuting the extracellular matrix to form cohesive pieces of extracellular matrix; and
lyophilizing the cohesive pieces of extracellular matrix to form an open cell foam of extracellular matrix. - View Dependent Claims (66, 67, 68, 69, 70, 71, 72, 78, 79)
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73. A method of making an implantable device for repairing or regenerating body tissue, the method comprising the steps of:
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providing a extracellular matrix material selected from the group consisting of;
small intestine submucosa, stomach submucosa, bladder submucosa, respiratory submucosa, alimentary submucosa, genital submucosa, and liver basement membrane; and
physically comminuting the extracellular matrix in the presence of a liquid to form a slurry of extracellular matrix. - View Dependent Claims (74, 75, 76, 77)
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80. A method of making an implantable scaffold for repairing or regenerating body tissue, the method comprising the steps of:
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providing an extracellular matrix material selected from the group consisting of;
small intestine submucosa, stomach submucosa, bladder submucosa, respiratory submucosa, alimentary submucosa, genital submucosa, and liver basement membrane;
suspending pieces of the extracellular matrix material in a liquid; and
freeze drying the pieces of extracellular matrix material and the liquid. - View Dependent Claims (81)
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82. A method of making an implantable scaffold for repairing or regenerating body tissue, the method comprising the steps of:
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providing an extracellular matrix material selected from the group consisting of;
small intestine submucosa, stomach submucosa, bladder submucosa, respiratory submucosa, alimentary submucosa, genital submucosa and liver basement membrane;
suspending pieces of the extracellular matrix material in a liquid;
forming the pieces of the naturally occurring extracellular matrix and the liquid into a mass; and
driving off the liquid so as to form interstices in the mass. - View Dependent Claims (83)
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84. A slurry comprising cohesive pieces of naturally occurring extracellular matrix in a liquid.
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85. A slurry of extracellular matrix material comprising cohesive pieces of extracellular matrix in a liquid, the extracellular matrix material being selected from the group consisting of:
- small intestine submucosa, stomach submucosa, bladder submucosa, respiratory submucosa, alimentary submucosa, genital submucosa, and liver basement membrane.
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86. A method of treating defective cartilage in a joint of a patient comprising:
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implanting a biocompatible device in the patient at the joint;
the device comprising a foam comprising naturally occurring extracellular matrix having a plurality of interconnected pores, at least part of the extracellular matrix having interconnected pores having a nominal pore size of between about 30 and 100 microns.
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87. A method of treating defective cartilage in a joint of a patient comprising:
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providing an extracellular matrix material selected from the group consisting of;
small intestine submucosa, stomach submucosa, bladder submucosa, respiratory submucosa, alimentary submucosa, genital submucosa, and liver basement membrane;
forming the extracellular matrix material into a foam having a plurality of interconnected pores, at least part of the extracellular matrix having interconnected pores having a nominal pore size of between 30 and 100 microns; and
implanting the foam at the joint of the patient.
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88. A method of treating diseased or damaged bone comprising:
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implanting a device in the diseased or damaged bone;
the device comprising a foam comprising naturally occurring extracellular matrix having a plurality of interconnected pores, at least part of the extracellular matrix having interconnected pores having a nominal pore size greater than about 200 microns.
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89. A method of treating diseased or damaged bone comprising:
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providing an extracellular matrix material selected from the group consisting of;
small intestine submucosa, stomach submucosa, bladder submucosa, respiratory submucosa, alimentary submucosa, genital submucosa, and liver basement membrane;
forming the extracellular matrix material into a foam having a plurality of interconnected pores, the interconnected pores having an irregular shape and extending in three dimensions, at least part of the extracellular matrix having interconnected pores having a nominal pore size greater than 200 microns; and
implanting the foam in the bone having the disease or damage.
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- 90. An implantable device for repairing or regenerating body tissue, the device comprising a porous naturally occurring extracellular matrix, the porous matrix having a density of less than 0.1 g/cc.
- 97. A method of processing an extracellular matrix material comprising the step of comminuting the extracellular matrix material in the presence of a liquid.
Specification