Fenestrated implant
First Claim
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1. An implant for bone fixation, the implant comprising:
- an elongate body having a longitudinal axis, a distal end, a proximal end, a rectilinear cross section transverse to the longitudinal axis having three or four sides, and a plurality of faces, each of the plurality of faces formed from a wall with a thickness between 1 mm and 5 mm in thickness, and each face having a width and a plurality of fenestrations, the plurality of fenestrations each having a diameter that is between about 0.2 to about 0.5 of the width of its associated face, the elongate body having a central lumen located along the longitudinal axis and configured to receive a guide pin, wherein each of the plurality of fenestrations reach and provide access to the central lumen, wherein a concentration or number of fenestrations is higher in a distal half of the elongate body than in a proximal half, wherein the distal end of the elongate body is tapered to facilitate implantation into the bone, and wherein the elongate body has a bending strength or a shear strength of at least 0.5 relative to a reference elongate body with identical dimensions and material composition but without any fenestrations.
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Abstract
The present invention relates generally to implants used in medical procedures such as bone fixation or fusion. More specifically, this application relates to fenestrated implants used in bone fixation or fusion.
532 Citations
20 Claims
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1. An implant for bone fixation, the implant comprising:
an elongate body having a longitudinal axis, a distal end, a proximal end, a rectilinear cross section transverse to the longitudinal axis having three or four sides, and a plurality of faces, each of the plurality of faces formed from a wall with a thickness between 1 mm and 5 mm in thickness, and each face having a width and a plurality of fenestrations, the plurality of fenestrations each having a diameter that is between about 0.2 to about 0.5 of the width of its associated face, the elongate body having a central lumen located along the longitudinal axis and configured to receive a guide pin, wherein each of the plurality of fenestrations reach and provide access to the central lumen, wherein a concentration or number of fenestrations is higher in a distal half of the elongate body than in a proximal half, wherein the distal end of the elongate body is tapered to facilitate implantation into the bone, and wherein the elongate body has a bending strength or a shear strength of at least 0.5 relative to a reference elongate body with identical dimensions and material composition but without any fenestrations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An implant for bone fixation, the implant comprising:
an elongate body having a longitudinal axis, a distal end, a proximal end, a rectilinear cross section transverse to the longitudinal axis having three or four sides, and a plurality of faces, each of the plurality of faces having a width and a plurality of fenestrations, the plurality of fenestrations each having a diameter that is between about 0.2 to about 0.5 of the width of its associated face, the elongate body having a central lumen located along the longitudinal axis and configured to receive a guide pin, wherein each of the plurality of fenestrations reach and provide access to the central lumen, wherein a concentration or number of fenestrations is higher in a distal half of the elongate body than in a proximal half, wherein the distal end of the elongate body is tapered to facilitate implantation into the bone, and wherein the elongate body has a bending strength or a shear strength of at least 0.5 relative to a reference elongate body with identical dimensions and material composition but without any fenestrations. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
Specification