A fiber-based surgical implant stabilized against fraying, includes a thermally crimped flat-knitted fabric of a biocompatible, optionally biodegradable, polymer material having a glass transition temperature or other thermally induced secondary conformational mobility threshold in the temperature range of from 20? C. to +170? C. Also disclosed is a corresponding fabric and methods of producing the implant and the fabric.

According to some embodiments of the invention, an intervertebral disc replacement includes a first layer having a lower surface for contacting a first vertebral bone, a second layer coupled to the first layer, the second layer comprising a plurality of compressible column springs, and a third layer coupled to the second layer, the third layer having an upper surface for contacting a second vertebral bone. Each of the plurality of compressible column springs comprises a plurality of stacked coils, and each of the plurality of stacked coils has a spring constant (K). At least one of the plurality of compressible column springs includes a first coil having a first spring constant and a second coil comprising a second spring constant, wherein the first spring constant is different from the second spring constant.

The presented disclosure is a prosthesis for performing radial head replacement in the setting of fractures or degenerative conditions of the radial head, and other conditions including avascular necrosis. The presented radial head replacement prostheses can be implanted in a cement-less or cemented fashion. The prosthesis of the presented disclosure comprises a radial head replacement which in various embodiments includes (1) one or more interlocking screw holes along the stem, (2) a radial head replacement prosthesis with a two component design and with a tapered connection, (3) a radial head replacement prosthesis with a two component design and with a cylindrical connection, (4) a radial head replacement prosthesis with a two component design and with a curved stem, (5) a radial head replacement prosthesis with a two component design and with an inter-component screw connection, and (6) a radial head replacement prosthesis with a one-piece design.

An orthopedic implant apparatus, said apparatus comprising: a body, said body having a generally cylindrical shape, a flat bottom surface, and a top surface; at least one stem, said at least one stem connected to said bottom surface of said body; an articular component, said articular component having a bottom connecting side and a top bearing side; and a flexible component, said flexible component disposed between said body and said articular component, said flexible component attached to said top surface of said body and said bottom side of said articular component.

An expandable implant includes an upper main support, a lower main support, an upper pivoting support, and a lower pivoting support. The upper main support and the upper pivoting support are configured to engage a first portion of bone, and the lower main support is coupled to the upper main support and configured to engage a second portion of bone. The upper main support is adjustable relative to the lower main support to adjust height of the implant. The upper pivoting support is rotatably movable relative to the upper main support. The lower pivoting support is coupled to the upper pivoting support, configured to engage the second bone portion, and is rotatably movable relative to the lower main support. Adjusting the upper main support relative to the lower main support causes adjustment of the upper pivoting support relative to the lower pivoting support.

Disclosed are a fusion cage for a spinal surgery and a clamping device thereof. The fusion cage comprises a fusion cage body (1) and a triangular screw plate (2). A limiting groove (12) fit with the clamping device is provided at a rear end surface of the fusion cage body (1), the fusion cage body (1) is hinged with the screw plate (2), and each of three corners of the screw plate (2) is provided with a screw hole (23). The clamping device comprises two clamping rods (4) which are fit with each other, and a front end of each clamping rod (4) is provided with a clamping head (41), wherein each of face-to-face sides of the clamping heads (41) is provided with a limiting protrusion (42), a front end of each clamping head (41) is capable of being inserted into the limiting groove (12) of the fusion cage body (1), and the limiting protrusion (42) is capable of being clamped at a front side surface of the screw plate (2). The fusion cage and the clamping device can easily fit with each other and are convenient to use, so as to enable the surgical operation to be more convenient, accurate and safe.

According to some embodiments of the invention, an intervertebral disc replacement includes a first layer having a lower surface for contacting a first vertebral bone, a second layer coupled to the first layer, the second layer comprising a plurality of compressible column springs, and a third layer coupled to the second layer, the third layer having an upper surface for contacting a second vertebral bone. Each of the plurality of compressible column springs comprises a plurality of stacked coils, and each of the plurality of stacked coils has a spring constant (K). At least one of the plurality of compressible column springs includes a first coil having a first spring constant and a second coil comprising a second spring constant, wherein the first spring constant is different from the second spring constant.

Instruments, kits, and methods are disclosed for installing an implant spacer through an incision and down a surgical corridor. The instruments also serve to align a drill guide and align and insert a spacer stabilizer for stabilization of adjacent bone portions. An inserter instrument comprises an elongated guide bar body having a guide portion for aligning instruments with said spacer and for introducing a stabilizer to secure the spacer in a predetermined position between the bone portions. In preferred embodiments a stabilizer implant portion comprising a base wall separated by a retaining member by a web wall is introduced into a pre-bored hole in a bone and secured with a stabilizer anchor extending through a central bore. Included is a retractable graft block for securing graft material within an aperture of a spacer during insertion of the spacer.

A system for spinal surgery includes a prosthesis comprising a plurality of bone anchors which engage an intervertebral construct for fusion or motion preservation. The fusion construct comprises a spacer optionally encircled by a jacket. The motion preservation construct may comprise an articulating disc assembly or an elastomeric disc assembly. Any of the constructs may occupy the intervertebral disc space between adjacent vertebrae after removal of an intervertebral disc. The anchors slidingly engage the construct to securely fix the prosthesis to the vertebrae. The anchors and jacket of the fusion construct provide a continuous load path across opposite sides of the prosthesis so as to resist antagonistic motions of the spine.

For inserting a cage in the intervertebral disk space between two vertebrae, an instrument set includes a guide wire with a plurality of dilators that can be pushed over the guide wire and one over another, with a working sleeve and with a cage, in which the working sleeve is designed in its distal area such that it makes possible the fixation of its distal area in the direction of its extension with angular mobility or variable angular orientability of its proximal end.