Open helical organic tissue anchor and method of facilitating healing
First Claim
1. An organic tissue anchor comprising a rigid, biocompatible, elongate member having a diameter of from about 0.4 millimeters to about 3 millimeters comprising surgical-grade titanium or stainless steel wire or a bioabsorbable material which forms an open, helical structure having a length from about 3 millimeters to about 75 millimeters, an outer diameter of a constant dimension of from about 1.5 millimeters to about 15 millimeters, a slope from about 0.5 to about 10 turns per centimeter and having at a first end an insertion tip and at a second end an attachment head which is capable of connecting organic tissue to said anchor and which comprises a crossbar having an eyelet for receiving a suture.
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Abstract
The invention relates to a tissue anchor which is an open helix of biocompatible material having a slope of from 0.5 to 10 turns per centimeter, a length from 3 to 75 millimeters, a diameter of from 1.5 to 11 millimeters, and an aspect ratio of from about 3 to about 5 to 1. The anchor can have a head which is capable of securing or clamping tissue together, such as holding a suture to secure a ligament or tendon to bone. The anchor can also have a head which causes an inward, compressive loading for use in fastening bone to bone, orthopedic plates to bone, or cartilage to bone.
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Citations
16 Claims
- 1. An organic tissue anchor comprising a rigid, biocompatible, elongate member having a diameter of from about 0.4 millimeters to about 3 millimeters comprising surgical-grade titanium or stainless steel wire or a bioabsorbable material which forms an open, helical structure having a length from about 3 millimeters to about 75 millimeters, an outer diameter of a constant dimension of from about 1.5 millimeters to about 15 millimeters, a slope from about 0.5 to about 10 turns per centimeter and having at a first end an insertion tip and at a second end an attachment head which is capable of connecting organic tissue to said anchor and which comprises a crossbar having an eyelet for receiving a suture.
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9. A method of securing tissue comprising:
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accessing a surgical site including a tissue anchoring site in bone; implanting an anchor comprising an open, rigid, biocompatible helix into said site, said helix being formed from an elongate member having a circular cross-section with a diameter of from about 0.2 to about 5 millimeters, and said helix having a length of from about 2 to about 75 millimeters, a slope from about 5 to about 10 turns per centimeter, and an outer diameter of from about 1.5 to about 11 millimeters; and attaching a tissue to said anchor. - View Dependent Claims (10, 11, 12)
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13. A method of buttressing bone comprising the steps of:
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accessing a surgical site including at least a first cortical bone surface aligning a plate having an aperture on said first cortical surface; and implanting at least one anchor through said plate aperture into at least said first conical surface, said anchor comprising an open helix having a length of from about 5 to about 75 millimeters, a slope of from about 0.5 to about 10 turns per centimeter, and said helix being formed from an elongate member having a circular cross-section having a diameter of from about 0.2 to about 5 millimeters, said helix having a constant outer diameter said helix further having at a first end an insertion tip and at a second end a head capable of applying a compressive force in the direction of the first end.
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- 14. A bone anchor comprising a rigid, biocompatible, elongate member comprising a wire having a regular, solid cross-section with a diameter of from about 1.0 millimeter to about 2 millimeters which forms an open, helical structure having a length from about 3 millimeters to about 75 millimeters, an outer diameter of a constant dimension of from about 3 millimeters to about 9 millimeters, a slope from about 0.5 to about 4 turns per centimeter, and an aspect ratio of about 3 to about 5, said anchor having at a first end a bone insertion tip, and at a second end an attachment head having means for connecting organic tissue to said anchor, said attachment head being one piece with said helical structure, and said head having substantially the same outer diameter as said helix.
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16. A method of buttressing bone comprising the steps of:
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accessing a surgical site including at least a first cortical bone surface; implanting at least one anchor into at least said first cortical surface, said anchor comprising an open helix having a length of from about 5 to about 75 millimeters, a slope of from about 0.5 to 10 turns per centimeter, and said helix being formed from an elongate member having a circular cross-section having a diameter of from about 0.2 to about 5 millimeters, said helix having a constant outer diameter, said helix further having at a first end an insertion tip and at a second end a head capable of applying a compressive force in the direction of the first end and wherein said head is cannulated, and further including the steps of using a guide wire to achieve initial bone alignment and subsequently implanting said anchor about said guide wire by means of said cannulation.
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Specification