BONE ANCHORS FOR ORTHOPEDIC APPLICATIONS
First Claim
Patent Images
1. A bone anchor comprising:
- an elongate element having a near end, a distal end, an inner surface and an outer surface, wherein the element is adapted for placement within a void in a bone and is adapted to receive and secure a fastening device; and
wherein the element is formed from a composite comprising;
a plurality of particles selected from the group consisting of;
particles of bone-derived material, bone particles, particles of bone substitute material, inorganic particles, and any combination thereof; and
a polymer with which the plurality of particles have been combined.
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Accused Products
Abstract
Bone anchors and related methods for their use are described. The inventive anchor is suitable for placement in bone and for use in orthopedic surgery and dentistry. The bone anchor can be made from a bone/polymer or bone substitute/polymer composite, and can provide a firm and secure base for attaching a fastening device. The bone anchor can be used in various orthopedic and dental procedures including spinal surgery, where normal, cancellous, cortical, diseased or osteoporotic bone is present. The bone anchor can be resorbed and/or replaced with native bone tissue over a period of time. In certain embodiments, the bone anchor is made malleable or flowable and formed in situ or in vivo.
117 Citations
77 Claims
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1. A bone anchor comprising:
an elongate element having a near end, a distal end, an inner surface and an outer surface, wherein the element is adapted for placement within a void in a bone and is adapted to receive and secure a fastening device; and
wherein the element is formed from a composite comprising;a plurality of particles selected from the group consisting of;
particles of bone-derived material, bone particles, particles of bone substitute material, inorganic particles, and any combination thereof; anda polymer with which the plurality of particles have been combined. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 36, 37, 38, 39)
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32. A bone anchor for spinal surgery comprising:
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a substantially cylindrical, conical or tulip shaped elongate element adapted for placement in a void in the pedicle of a vertebra of a subject, the elongate element further adapted to receive and secure a fastening device;
wherein the elongate element is formed from a composite comprising;bone particles; and a polymer; and
whereinat least a portion of the bone anchor expands radially outward upon insertion of a fastening device into the elongate element.
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34. A method of forming a bone anchor in vivo, the method comprising:
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placing a fastening-device form into a void in a bone; injecting a flowable composite into the vacancy between the fastening-device form and the surrounding bone, the composite comprising a plurality of particles of a bone substitute material, bone-derived material, bone particles, inorganic material, or any combination thereof combined with a polymer; transforming the composite to a substantially solid state; and removing the fastening-device form. - View Dependent Claims (35)
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40. A method of placing a bone anchor, the method comprising:
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rendering a composite into a flowable state, the composite comprising (1) a plurality of particles of an inorganic material, a bone-substitute material, a bone-derived material, bone particles, or any combination thereof; and
(2) a polymer;injecting the composite into a void within a bone; and forming a hole in the composite bone anchor to receive a fastening device
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47. A method of placing a bone anchor in a vertebra, the method comprising:
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evaluating a characteristic of at least a portion of the vertebra; selecting a type of bone anchor based upon the evaluated characteristics; preparing a site in the vertebra to receive the bone anchor; and providing the bone anchor to the prepaired site. - View Dependent Claims (48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58)
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59. A bone anchor formed from a composite comprising:
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a plurality of particles selected from the group consisting of;
particles of bone-derived material, bone particles, particles of bone substitute material, inorganic particles, and any combination thereof; anda polymer with which the plurality of particles have been combined.
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Specification