Intervertebral implant
First Claim
1. An implant for an intervertebral space comprising a compression element and a frame having closed sides, and a top and bottom which are open, said frame defining an inner cavity provided with an anterior lead-in face and a posterior manipulation face, the frame further having a longitudinal axis extending from the anterior face to the posterior face, wherein the inner cavity is open without restriction at the top and bottom and contains compressible material therein, and the posterior manipulation face of the frame is provided with an aperture shaped for the introduction of the compression element to force the compressible material out of the inner cavity through the top and bottom of the frame, wherein the compression element is insertably adjustable into the cavity.
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Accused Products
Abstract
The present invention related to an implant (1) for an intervertebral space consists of a frame (2) which is closed at the sides but open without restriction at the top and bottom and provided with an anterior lead-in face (3) and a posterior manipulation face (4). The upper (5) and lower boundary (6) of the frame (2) is convex, so that the implant (1) has an overall lens shape in the midplane (8) of the frame (2) containing the longitudinal axis (7) of the implant (1). The inner cavity (15) which is open without restriction at the top and bottom can be filled with a compressible material. The posterior manipulation face (4) of the frame (2) is provided with an aperture (9) to allow the introduction of a compression element (10) with which the compressible material can be forced out of the inner cavity (15).
440 Citations
19 Claims
- 1. An implant for an intervertebral space comprising a compression element and a frame having closed sides, and a top and bottom which are open, said frame defining an inner cavity provided with an anterior lead-in face and a posterior manipulation face, the frame further having a longitudinal axis extending from the anterior face to the posterior face, wherein the inner cavity is open without restriction at the top and bottom and contains compressible material therein, and the posterior manipulation face of the frame is provided with an aperture shaped for the introduction of the compression element to force the compressible material out of the inner cavity through the top and bottom of the frame, wherein the compression element is insertably adjustable into the cavity.
- 15. An implant for an intervertebral space comprising a frame having closed sides, and an open top and bottom, said frame defining an inner cavity provided with an anterior lead-in face and a posterior manipulation face, the frame further having a longitudinal axis extending from the anterior face to the posterior face and upper and lower boundaries convexly curved about an axis transverse to the longitudinal axis so that the implant has an overall lens shape substantially corresponding to the intervertebral space into which the implant is to be inserted, wherein the inner cavity is open without restriction at the top and bottom, wherein the posterior manipulation face of the frame is provided with an aperture, and wherein the implant has a P value of about 0.5 to 1.5 mm, wherein P is defined as FT/O, where F is the cross sectional area F of the aperture, T is the maximum possible penetration depth of the compression element into the inner cavity, and O is the reciprocal of the sum of the areas of the two openings in the upper and lower boundaries of the frame.
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17. An implant for an intervertebral space comprising:
- a compression element that has a bore with a flange; and
a frame having closed sides and a top and bottom which are open without restriction, said frame defining an inner cavity provided with an anterior lead-in face and a posterior manipulation face, the frame further having a longitudinal axis extending from the anterior face to the posterior face and upper and lower boundaries so that the implant has an overall lens shape substantially corresponding to the intervertebral space in which the implant is to be inserted, wherein the inner cavity is open without restriction at the top and bottom and includes compressible material therein, and wherein the posterior manipulation face of the frame is provided with an aperture shaped for the introduction of the compression element in order to force compressible material out of the inner cavity through the top and bottom of the frame. - View Dependent Claims (18)
- a compression element that has a bore with a flange; and
Specification