摘要:
A bone fastener for stabilizing bone fragments includes a single or multiple components coupleable with one another and displaceable to a locked position of the bone fastener.
摘要:
A plurality of differently configured bone spinal implants for insertion in a spine have a cylindrical bore for receiving an insertion head stud. A plurality of instruments are disclosed each of which have a first connection element which is either a male or female member such as e.g., a ball and socket, a cylinder and socket and so on for forming either a stationary or articulating interchangeable joint for a plurality of disc processing heads or implant insertion heads. The plurality of disc space processing heads or implant insertion heads have a complementary second joint member for interchangeable attachment to the first connection element. The implant insertion heads or disc processing heads have different configurations for different shaped implants. Different instrument insertion or disc processing heads such as implant inserters, impactors, rasps, distractors, curettes, rongeur, and so on are disclosed as being interchangeable with a common instrument in which articulating or fixed joints are provided the interchangeable heads.
摘要:
A non-rigid system and method for stabilizing displaced bony members include a flexible unit of tethering material coupled to the displaced bony members so as to restore a desired shape, curvature of or relationship between the bony members without excessively limiting mobility of bony members located adjacent to the displaced members the rest of the portions of the motion bony segment during a restoration process.
摘要:
Intervertebral implant system for intervertebral implantation, are disclosed. An intervertebral implant system according to the present disclosure includes a frame having a peripheral wall defining a space therein, and a settable material introducible into the space of the frame. The settable material is a biocompatible load bearing material including and not limited to bone, composites, polymers of bone growth material, collagen, and insoluble collagen derivatives. The settable material is injectable into the space defined by the frame. The settable material may have an initial fluid condition wherein the fluid settable material cures to a hardened condition.
摘要:
A C-shaped or ring shaped implant formed of cortical bone has its C-shaped or inner channel filled with a bone promoting material which is preferably demineralized bone fibers formed as a flexible wet sheet or may be cancellous bone, pressed bone fibers formed from demineralized cortical bone chips soaked in acid, or a flex material formed of demineralized bone growth promoting bone fibers. The discrete bone filler element may be secured by a bonding agent, pins or screws, metal, polymer or bone material. The bone filler material is preferably bonded by filling a section of a long bone medullary cavity with wet bone fibers and then drying the fibers to bond them to the outer bone. A filled bone ring may be sliced to form annular filled sections which are then divided into mirror image C-shaped halves each forming an implant. Flex material of compressed bone fibers may be formed with an opening shaped to receive a cortical bone implant element having a C-shaped channel. The flex material surrounds the cortical bone element and fills its channel. Other embodiments are disclosed.
摘要:
A chisel with U.V-shaped, saw tooth or other shaped opposing blades is used to form channels in adjacent vertebrae. The chisel has a projection extending from at least one of the top and bottom surfaces to limit depth of penetration into the vertebrae. A guide member may be attached to the forward tip of the chisel to guide the chisel into the disc space to uniformly chisel both adjacent vertebrae simultaneously to form a channel in the vertebrae. The so formed channels serve as sa guide for a second chisel having no guide member. The second chisel, which may be a box chisel, is used to complete the channels to the desired depth to receive an associated implant, typically of cortical bone. Other embodiments are disclosed in which a two step box chisel has a retractable guide member for initially guiding the chisel as it forms partial channels in the vertebrae disc space. The guide member is then retracted and the channels formed to the desired depth. The chisels include guide member pins which serve to both limit the extension and retraction of the guide member and also to serve to limit the depth of penetration of the chisel, physically and visually. The guide member may be retracted with a rotatable knob and a threaded engaged rod or with an axially displaceable pin and rod assembly attached to the guide member. A procedure for using the chisels is also disclosed.
摘要:
A method and apparatus for fluidly coupling a reservoir containing a flowable biomaterial to a mold. The flow of the flowable biomaterial into the mold is controlled in accordance with a first operating parameter. At least one injection condition is monitored. The flow of the flowable biomaterial is controlled in accordance with a second operating parameter in response to one or more of the injection conditions reaching a threshold level. The second operating parameter is maintained during at least a portion of the curing of the flowable biomaterial. In some embodiments, the second operating parameter may optionally include permitting a portion of the flowable biomaterial to be expelled from the mold.
摘要:
A method of stabilizing adjacent vertebrae including the steps of forming at least one annulotomy in an annulus. At least a portion of the nucleus material is removed through the annulotomy to form a cavity in an intervertebral disc space between the adjacent vertebrae. A reservoir containing a flowable biomaterial is fluidly coupled to the intervertebral disc space. A flowable biomaterial is delivered to the cavity. The delivery of the flowable biomaterial into the intervertebral disc space is controlled in accordance with at least a first operating parameter. The biomaterial is at least partially cured to stabilize the adjacent vertebrae.
摘要:
A nuclectomy method for creating a nuclear cavity in an annulus located in an intervertebral disc space and for preparing the nuclear cavity to receive an intervertebral prosthesis. An annulotomy is formed in the annulus along an annular axis to provide access to a nucleus. A portion of the nucleus is removed in a first region surrounding the annular axis using at least a first surgical tool. Another portion of the nucleus is removed from a second region using at least a second surgical tool. An evaluation mold is positioned in the nuclear cavity and a fluid is delivered to the evaluation mold so that the mold substantially fills the nuclear cavity. The amount of nucleus removed from the annulus is estimated. One or more of the removing steps are optionally repeated as necessary until an adequate amount of the nucleus is removed from the annulus.
摘要:
A catheter holder designed to deliver a curable biomaterial to an intervertebral disc space. By securing the catheter to the catheter holder, the depth of insertion of the catheter into the disc space can be accurately controlled. The catheter holder optionally helps with insertion of a optional mold through the annulotomy and into the disc space created by the nuclectomy. The catheter holder helps keep the mold from being drawn too far into the disc space or pushed too far out of the disc space during polymer injection.