An interspinous implant includes an implant body having an upper face, a lower face, and four sides. The implant body includes a first recess and a second recess in opposite sides, wherein each recess is suitable for receiving a spinous process of a vertebrae. Attachment means are provided and suita
An interspinous implant includes an implant body having an upper face, a lower face, and four sides. The implant body includes a first recess and a second recess in opposite sides, wherein each recess is suitable for receiving a spinous process of a vertebrae. Attachment means are provided and suitable for attaching a band to the implant body. The implant further includes a lock hinged to a side of the implant body on a side not having the recesses, with the lock rotatable about the hinge between a closed position and an open position in which the lock projects away from the side of the implant body. The lock has an aperture, and a band can pass through the aperture when the lock is open and can be secured against movement relative to the lock and the implant body by the lock when the lock is closed.
대표청구항▼
1. An interspinous implant comprising: (i) an implant body which has an upper face, a lower face, and four sides, wherein the implant body comprises; a first recess in one side of the implant body, and a second recess in the opposing side of the implant body to the first recess, wherein each recess
1. An interspinous implant comprising: (i) an implant body which has an upper face, a lower face, and four sides, wherein the implant body comprises; a first recess in one side of the implant body, and a second recess in the opposing side of the implant body to the first recess, wherein each recess is suitable for receiving a spinous process of a vertebrae;an attachment means adapted to attach a band to the implant body wherein the attachment means comprises a first aperture which is at a corner of the implant body and which extends between two sides of the implant body; anda second aperture, which is enclosed and adapted to receive a free end of a band, extending from the side containing the first or second recess into a cavity in a side of the implant body that does not have the first or second recess; and(ii) a lock which is hinged via a hinge to the side of the implant body that does not have the first or second recess; wherein the lock can rotate about the hinge between a closed position in which the lock lies substantially within the cavity in the side of the implant body or against the side of the implant body and an open position in which the lock projects away from the side of the implant body;wherein the lock has a third aperture, so that a band can be passed through the third aperture in the lock when the lock is in the open position and the band can be secured against movement relative to the lock and the implant body by the lock when the lock is in the closed position. 2. The interspinous implant according to claim 1, wherein the implant comprises two locks which are hinged to opposing sides of the implant body. 3. The interspinous implant according to claim 1, wherein the interspinous implant additionally comprises a band attached to the attachment means of the implant body, wherein the implant body comprises two attachment means diagonally opposed to one another with a band attached to each attachment means. 4. The interspinous implant according to claim 3, wherein each band is stiffened at a free end and/or is attached to a needle at the free end. 5. The interspinous implant according to claim 3, wherein the or each band is made from a woven synthetic material, wherein the or each band is heat-treated on at least two strips across the or each band. 6. The interspinous implant according to claim 1, wherein the implant body and/or the locks comprise a radio-opaque material. 7. The interspinous implant according to claim 1, wherein the implant body has an inclined surface forming the side of the implant body or forming a surface of the cavity in the side of the body to which one or each lock is hinged, wherein the inclined surface is inclined towards the hinge. 8. The interspinous implant according to claim 1, wherein the implant comprises a threaded cavity on the upper face of the implant body for engagement with a tightening system, wherein the threaded cavity is substantially in the middle of the upper face. 9. The interspinous implant according to claim 8, wherein the implant comprises two or more additional cavities on the upper face of the implant body for engagement with a tightening system. 10. A method of making an interspinous implant according to claim 1, the method comprising the steps of: making the implant body;making the lock of the implant; andhinging the lock to the side of the implant body, so that it can rotate between a closed position in which the lock lies substantially within the cavity in the side of the implant body or against the side of the implant body, and an open position in which the lock projects away from the implant body. 11. A method of fitting an implant in a subject, the method comprising the steps of: providing an interspinous implant according to claim 1 and which has a band attached to it;inserting the implant body of the interspinous implant between the spinous processes of adjacent vertebrae so that the spinous processes are located in the recesses of the implant body;passing the free end of the band around a spinous process and through the aperture in the lock when the lock is in an open position; andclosing the lock and tightening the band to secure the implant in place relative to the spinous processes. 12. A kit comprising the interspinous implant according to claim 1 and further including a tightening system including: (i) a holder with engagement means at its distal end which is suitable for engagement with a cavity in an upper face of the interspinous implant;(ii) a tightening guide which can be placed over the holder wherein the tightening guide has at its distal end a plate which is suitable for engagement with the implant body of the interspinous implant to prevent relative rotational movement between the tightening guide and the body, wherein the plate provides an arcuate tightening surface, and wherein the tightening guide has at its proximal end a handle which had at least one aperture through it; and(iii) a tightening rod, wherein the tightening rod has at its distal end an aperture extending lengthwise through which a band can pass, and the tightening rod has at its proximal end a handle, wherein the tightening rod can be placed though the aperture in the handle of the tightening guide and extends to contact the arcuate tightening surface of the plate of the tightening guide, so that when a band is passed through the aperture of the tightening rod, the band can be tightened by rotating the tightening rod relative to the tightening guide.
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