Bioabsorbable tack for joining bodily tissue
First Claim
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1. A tack for joining bodily tissue to permit healing in vivo, comprising:
- a stem having a proximal end and a distal end;
a head disposed at said proximal end of said stem;
a bore extending longitudinally, axially through said tack from said distal end through said head;
securing means disposed in said bore within said head for securing said tack to an impactor; and
annular rib means disposed peripherally about said stem between said proximal and distal ends for facilitating insertion of said tack into the tissue in a first direction extending from said proximal end toward said distal end and resisting movement of said tack in a second direction opposite said first direction;
`said tack being made of a bioabsorbable material having a degradation time at least as long as a predetermined anticipated time for healing of the bodily tissue;
wherein said annular rib means includes a plurality of discrete axially spaced annular ribs disposed in successive longitudinal positions along said stem;
wherein each of said annular ribs includes a maximum transverse cross-section having a cylindrical configuration, a forward facing surface and a rearward facing surface; and
wherein said forward facing surface includes a frusto-conical portion extending forward from said maximum transverse cross-section and an adjacent hypercycloid portion extending forward from said frusto-conical portion.
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Accused Products
Abstract
A cannulated bioabsorbable tack has annular ribs configured to enhance fixation to tissue, such as bone, and is particularly effective for attaching soft tissue to bone, such as ligaments or muscles in the shoulder. Apparatus and method for displaying the tack facilitate arthroscopic surgical procedures for attaching or joining tissue.
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Citations
15 Claims
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1. A tack for joining bodily tissue to permit healing in vivo, comprising:
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a stem having a proximal end and a distal end; a head disposed at said proximal end of said stem; a bore extending longitudinally, axially through said tack from said distal end through said head; securing means disposed in said bore within said head for securing said tack to an impactor; and annular rib means disposed peripherally about said stem between said proximal and distal ends for facilitating insertion of said tack into the tissue in a first direction extending from said proximal end toward said distal end and resisting movement of said tack in a second direction opposite said first direction;
`said tack being made of a bioabsorbable material having a degradation time at least as long as a predetermined anticipated time for healing of the bodily tissue;wherein said annular rib means includes a plurality of discrete axially spaced annular ribs disposed in successive longitudinal positions along said stem; wherein each of said annular ribs includes a maximum transverse cross-section having a cylindrical configuration, a forward facing surface and a rearward facing surface; and wherein said forward facing surface includes a frusto-conical portion extending forward from said maximum transverse cross-section and an adjacent hypercycloid portion extending forward from said frusto-conical portion. - View Dependent Claims (2, 3)
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4. A tack for joining bodily tissue to permit healing in vivo, comprising:
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a stem having a proximal end and a distal end; a head disposed at said proximal end of said stem; a bore extending longitudinally, axially through said tack from said distal end through said head; securing means disposed in said bore within said head for securing said tack to an impactor; and annular rib means disposed peripherally about said stem between said proximal and distal ends for facilitating insertion of said tack into the tissue in a first direction extending from said proximal end toward said distal end and resisting movement of said tack in a second direction opposite said first direction; said tack being made of a bioabsorbable material having a degradation time at least as long as a predetermined anticipated time for healing of the bodily tissue; wherein said annular rib means includes a plurality of discrete axially spaced annular ribs disposed in successive longitudinally positions along said stems; and wherein each of said annular ribs has a maximum transverse cross-section with a cylindrical configuration, a forward facing surface and a rearward facing surface, and wherein said forward facing surface includes a frusto-conical portion extending forward from said maximum transverse cross-section and an adjacent hypercycloid portion extending forward from said frusto-conical portion. - View Dependent Claims (5, 6)
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7. A tack for joining bodily tissue to permit healing in vivo, comprising:
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a stem having a proximal end and a distal end, said stem having a bore extending axially through the entirety of said tack from said distal end to said proximal end; a plurality of annular ribs disposed peripherally about said stem in successive longitudinal positions between said proximal and distal ends for facilitating insertion of said tack into the tissue in a first direction extending from said proximal end toward said distal end, and resisting movement of said tack in a second direction opposite said first direction; said tack being made of a bioabsorbable material having a degradation time at least as long as a predetermined anticipated time for healing of the bodily tissue; wherein each of said annular ribs includes a maximum diameter cylindrical section disposed coaxially with said bore, a forward facing surface and a rearward facing surface; wherein said forward facing surface includes a forward frusto-conical portion extending forward from said maximum diameter cylindrical section, and an adjacent forward hypercycloid portion extending forward from said forward frusto-conical portion; wherein successive annular ribs are spaced by a root cylindrical section of minimum diameter coaxially disposed with said bore and positioned between said forward facing surface of one rib and said rearward facing surface of the next distal rib; and wherein said rearward facing surface includes a rearward hypercycloid portion extending forward from said root cylindrical section, and an adjacent rearward frusto-conical portion extending between said rearward hypercycloid portion and said maximum diameter cylindrical section. - View Dependent Claims (8, 9, 10)
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11. A tack for joining bodily tissue to permit healing in vivo, comprising:
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a stem having a proximal end and a distal end; a head disposed at said proximal end of said stem; a bore extending longitudinally, axially through said tack from said distal end through said head; securing means disposed in said bore within said head for securing said tack to an impactor; and annular rib means disposed peripherally about said stem between said proximal and distal ends for facilitating insertion of said tack into the tissue in a first direction extending from said proximal end toward said distal end and resisting movement of said tack in a second direction opposite said first direction; said tack being made of a bioabsorbable material having a degradation time at least as long as a predetermined anticipated time for healing of the bodily tissue; wherein said annular rib means includes a plurality of discrete axially spaced annular ribs disposed in successive longitudinal positions along said stem; and wherein each of said annular ribs includes a maximum transverse cross-section with a cylindrical configuration, a forward facing section and a rearward facing section, wherein said rearward facing section includes a frusto-conical portion extending rearward from said maximum transverse cross-section and a hypercycloid portion extending rearward from said frusto-conical portion.
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12. A tack for joining bodily tissue to permit healing in vivo, comprising:
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a stem having a proximal end and a distal end; a head disposed at said proximal end of said stem; a bore extending longitudinally, axially through said tack from said distal end through said head; securing means disposed in said bore within said head for securing said tack to an impactor; and annular rib means disposed peripherally about said stem between said proximal and distal ends for facilitating insertion of said tack into the tissue in a first direction extending from said proximal end toward said distal end and resisting movement of said tack in a second direction opposite said first direction; said tack being made of a bioabsorbable material having a degradation time at least as long as a predetermined anticipated time for healing of the bodily tissue; wherein said annular rib means includes a plurality of discrete axially spaced annular ribs disposed in successive longitudinal positions along said stem; wherein each of said annular ribs includes a maximum transverse cross-section having a cylindrical configuration, a forward facing surface and a rearward facing surface; wherein said forward facing surface includes a frusto-conical portion extending forward from said maximum transverse cross-section and an adjacent hypercycloid portion extending forward from said forward frusto-conical portion; wherein successive annular ribs are spaced by a cylindrical root section of minimum transverse cross-section disposed between said forward facing and rearward facing surfaces, respectively, of successive annular ribs; and wherein said rearward facing surface includes a rearward hypercycloid portion extending forward from said cylindrical root section and an adjacent frusto-conical portion extending between said rearward hypercycloid portion and said maximum transverse cross-section.
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13. A tack for joining bodily tissue to permit healing in vivo, comprising:
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a stem having a proximal end and a distal end; a head disposed at said proximal end of said stem; a bore extending longitudinally, axially through said tack from said distal end through said head; securing means disposed adjacent said head and comprising a threaded section of said tack for threadedly securing said tack to an impactor; and annular rib means disposed peripherally about said stem between said proximal and distal ends for facilitating insertion of said tack into the tissue in a first direction extending from said proximal end toward said distal end and resisting movement of said tack in a second direction opposite said first direction; said tack being made of a bioabsorbable material having a degradation time at least as long as a predetermined anticipated time for healing of the bodily tissue; wherein said annular rib means includes a plurality of discrete axially spaced annular ribs disposed in successive longitudinal positions along said stem; wherein each of said annular ribs includes a maximum cylindrical section, a forward facing surface and a rearward facing surface; and wherein said forward facing surface includes a frusto-conical portion extending forward from said maximum transverse cross-section and an adjacent hypercycloid portion extending forward from said frusto-conical portion.
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14. A tack for joining bodily tissue to permit healing in vivo, comprising:
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a stem having a proximal end and a distal end; a head disposed at said proximal end of said stem; a bore extending longitudinally, axially through said tack from said distal end through said head; securing means disposed adjacent said head and comprising a threaded section of said tack for threadedly securing said tack to an impactor; and annular rib means disposed peripherally about said stem between said proximal and distal ends for facilitating insertion of said tack into the tissue in a first direction extending from said proximal end toward said distal end and resisting movement of said tack in a second direction opposite said first direction; said tack being made of a bioabsorbable material having a degradation time at least as long as a predetermined anticipated time for healing of the bodily tissue; wherein said annular rib means includes a plurality of discrete axially spaced annular ribs disposed in successive longitudinal positions along said stem; wherein each of said annular ribs includes a maximum cylindrical section, a forward facing surface and a rearward facing surface; and
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15. A tack for joining bodily tissue to permit healing in vivo, comprising:
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a stem having a proximal end and a distal end; a head disposed at said proximal end of said stem; a bore extending longitudinally, axially through said tack from said distal end through said head; securing means disposed adjacent said head and comprising a threaded section of said tack for threadedly securing said tack to an impactor; and annular rib means disposed peripherally about said stem between said proximal and distal ends for facilitating insertion of said tack into the tissue in a first direction extending from said proximal end toward said distal end and resisting movement of said tack in a second direction opposite said first direction; said tack being made of a bioabsorbable material having a degradation time at least as long as a predetermined anticipated time for healing of the bodily tissue; wherein said annular rib means includes a plurality of discrete axially spaced annular ribs disposed in successive longitudinal positions along said stem; wherein each of said annular ribs includes a transverse cross-section having a maximum transverse cross-section with a cylindrical configuration, a forward facing surface and a rearward facing surface; wherein said forward facing surface includes a forward frusto-conical portion extending forward from said maximum transverse cross-section and an adjacent hypercycloid portion extending forward from said frusto-conical portion; wherein successive annular ribs are spaced by a root cylindrical section of minimum transverse cross-section disposed between said forward facing and rearward facing surfaces, respectively, of successive annular ribs; and wherein said rearward facing surface includes a rearward hypercycloid portion extending forward from said cylindrical root section and an adjacent frusto-conical portion extending between said rearward hypercycloid portion and said maximum transverse cross-section.
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Specification