摘要:
The invention relates to an intervertebral implant comprising a spacer (2) in which two opposite notches (6a, 6b) are formed suitable for receiving two respective spinus processes (26a, 26b) of two vertebrae, each notch defining two flanges (8a, 10a, 8b, 10b) each having an inside wall, and the implant also having a tie (4a, 4b) for holding said spacer on said spinus processes. Said tie is constituted by at least one strap having a portion surrounding a portion of the surface of a spinus process that is opposite from the bottom of the notch. Said implant has first fixing means (12a, 12b) formed in at least one flange (8a, 8b) for fixing a first end (18a, 18b) of said strap, and self-locking second fixing means (14a, 16a, 14b, 16b) formed in at least one other flange (10a, 10b) and through which the second end (20a, 20b) of said strap is inserted and then pulled to hold said strap (4a, 4b) in position, thereby securing said spacer (2) to said spinus processes (26a, 26b).
摘要:
The invention provides a bone screw for use in an implant assembly having a member including a hole through which the screw extends. The member preferably includes a socket in an anchor that receives a rounded bottom portion of the screw head in order to form a ball and socket connection. The screw has a necked area below the rounded bottom portion which projects through the hole and below that on the longitudinal axis of the screw. The screw includes a knurled collar that is sized so as to allow the anchor to be inserted onto the screw but which subsequently restrains the anchor from falling downward onto the threaded area of the screw.
摘要:
Anatomically contoured anterior cervical plates with bone ingrowth surfaces, providing for intersegmental compressive preloading, and a rigid and locked interface to all of the bone, screws, with those engaging the vertebrae deployed in highly convergent pairs. The bone screws have a tapered self-tapping leading end, an increasing root diameter with a generally constant outer diameter with a thread that is narrow and sharp throughout and an enlarged head portion capable of an interference fit to the receiving holes of the plate. Instrumentation consists of plate holders, a compression apparatus and a pilot hole forming device that interlocks with. the plate. Methods for spinal compression and bone hole preparation are provided.
摘要:
A multiple axis connector for securing a connecting rod of a spinal implant to a vertebra anchor wherein the connector includes a first element for securing to the vertebra anchor and a second element for receiving the connecting rod and which elements are joined by a ball joint member which permits relative angular adjustment therebetween.
摘要:
An insertion tool for a C-shaped bone spinal wedge shaped intervertebral implant comprises an outer shank with a hollow core in which is placed a shaft with a threaded stud which passes through a bore in the shank at an implant insertion end of the shank. A flat extension member defines a plane and extends from the shank overlying the stud, the stud for receiving a threaded bore of the spinal implant. The shaft has a knob distal the stud for rotatably attaching the stud to the implant. The extension member abuts the implant at mating flat surfaces which are spaced by a medial recess formed by a portion of the medullary canal of a long bone. A cap slides over the shank at an end opposite the extension member to capture the shaft in the shank core. A guide rod is attached to a collar on the shank normal to the plane of the extension member to assist the surgeon in orienting the implant to the disc space orientation during insertion of the implant. The extension member prevents rotation of the implant and in some implementations may absorb insertion stresses to minimize damage to the implant during insertion.
摘要:
A bottom-loading multi-axial bone anchor apparatus is disclosed. The apparatus includes a receiver member, a crown member, a bone anchor and a retaining member. The receiver member defines an upper opening and a lower opening, which may form part of the same opening, a channel, and a groove. The crown member and bone anchor are loaded into the lower opening of the receiver member, and the retaining member fits around the bone anchor and into the groove in the receiver member. The bone anchor is capable of multi-axial positioning with respect to the receiver member. An elongated member is placed in the channel of the receiver member, contacting the crown member, and a compression member is applied via the upper opening. The compression member presses down on the elongated member, which presses down on the crown member and locks the bone anchor between the crown member and the retaining member.
摘要:
The implant device is a minimally invasive device for assisting in the fusing together of vertebral bodies of the spine. The implant device immobilizes the vertebral bodies by immobilizing the respective spinous process extending from the vertebral body. The implant device has at least one spacer and hook to immobilize adjacent spinous processes. The spacer and hook are fastened to connection rods. Each connection rod can individually traverse through a range of motion, allowing each hook to engage the respective spinous process.
摘要:
Described is a solid rod implant having a pair of plates at each end of the rod which is designed for bridging two portions of a broken long bone, united or ununited, and maintaining the divided portions of the bone in rigid alignment with each other. The solid rod implant may be rigidly attached to the damaged long bone by means of the pair of partly tubular plates at either end of the rod. These plates provide the sole means of attachment of the implant to the bone i.e there is has no provision for any attachments along, beside or through any portion of the rod that would allow it to be apposed to, or attached to any portion of the bone to which it is providing support during osteosynthesis. By its design and method of rigid attachment to the bone, through partly tubular end plates, the implant allows controlled motion at the fractured or non united portions of the bone fragments, a motion which stimulates rapidly forming external bridging callus formation for osteosynthesis of the long bone, a process that shortens the time of osteosynthesis of long bones so treated.
摘要:
A spinal fixation and retrieval device has a solid main body including a cone-like body at one end thereof and a column-like body connected to a base of the cone-like body. The cone-like body has a length which is less than one third of the length of the main body. The column-like body is provided with at least two threads which are separated from each other by a distance which is at least two times the width of the base of the threads.
摘要:
A system for securing first and second opposing facet joints together, comprising: a cannulated drill having a side opening; and an extendible member received within the cannula of the cannulated drill, the extendible member having a distal end which passes out of the side opening in a direction radially outwards from the axis of the cannulated drill as the extendible member is advanced distally through the cannula of the drill. The drill can be rotated such that the extendible member ablates opposite contacting surfaces of first and second facet joints, promoting fusion between the first and second facet joints. A facet screw passing through a hole drilled by the cannulated drill through the first facet joint and into the second facet joint is tightened into position to immobilize the first and second facet joints together.