摘要:
There is disclosed a bone fixation device that can include a cage having an optional mesh portion. The bone fixation device can be configured to couple a leg portion to a foot portion of a user's body. In at least one embodiment, the device includes at least one cage having a plurality of struts forming cells. There can be an optional mesh portion having a pre-set porosity that can be either constant or variable in density. In at least one embodiment there can be a cage portion which is substantially spherical shaped. Alternatively, the device can be substantially egg shaped. In at least one embodiment there can be a central post hole for receiving a post. In another embodiment at least one plate or shaft can connect to the cage.
摘要:
A spinal prosthesis for insertion bilaterally into an annulotomy hole created laterally in a spinal disc between two abutting vertebrae that is composed of a first elongated member having first threading at one end and an end cap at its other end, a second elongated member having an end cap with a threaded hole fixed to one end of a hollow tube open-ended at its other end. The members are telescoped together with the threading of the first member mated with the threaded hole of the second member and the open end of said hollow tube disengageably engaged with the end cap of the first member for rotation together. A method for bilaterally implanting the members of the prosthesis using a wire, and then telescopically mating them.
摘要:
An expandable spinal prosthesis is provided for insertion unilaterally into an annulotomy hole created laterally in a spinal disc between two abutting vertebrae. The prosthesis is composed of an elongated rod having first threading at one end and second threading at its other end. A first member is threaded on the threading at one end of the rod. A second member is threaded on the threading at the other end of the rod. The members are disengageably engaged for rotation together. The first member has a plurality of resilient bands extending longitudinally between the two members, which are dependent on the spacing between the two members. The first member and the elongated rod define engagements for coupling of drivers to relatively rotate the members and rod in one sense so that the two members will move toward each other to cause the resilient bands to bend outwardly to expand the prosthesis and in an opposite sense so that the two members will move apart to cause the resilient bands to become unbent and collapse the prosthesis. A method for implanting the prosthesis from one side only and a method for explanting the prosthesis from one side only.
摘要:
A process for inserting a pivotable interbody spacer including an insertion instrument configured to manipulate a pivotable interbody spacer during insertion, wherein the insertion instrument includes means for coupling the interbody spacer and a means for fixing the angular position of the interbody spacer. According to one method for inserting an interbody spacer in a spinal disk space, the interbody spacer is grasped by the insertion instrument and fixed at a first angular position. The interbody spacer is next inserted into a surgical site. Next, the interbody spacer is released from a first angular position. Then, the insertion instrument is pivoted about a coupling of the interbody spacer such that the interbody spacer is in a second angular position. The angular position of the interbody spacer is then fixed in the second angular position. This insertion process continues until the interbody spacer is positioned in the desired location.
摘要:
An intervertebral implant includes first and second implant bodies, which extend along a longitudinal direction of the implant, and a threaded member. The bodies include first and second proximal and distal ends movable longitudinally relative to each other. The threaded member is rotatably seated in the first implant body and has a proximal end accessible from outside the implant.
摘要:
A lumbar disc prosthesis is provided including a first member with a vertebral disc contact surface and a recessed portion on an opposing surface thereof; a second member with a vertebral disc contact surface and a protruding portion on an opposing surface thereof. The protruding portion of the second member engages with the recessed portion of the first member in use. A facet joint prosthesis is provided, including a first member for attachment to a first posterior lumbar disc in use and a second member for attachment to a second posterior lumbar disc in use, where at least a part of the first member is telescopically mounted in at least a part of the second member in use.
摘要:
A lumbar disc prosthesis is provided including a first member with a vertebral disc contact surface and a recessed portion on an opposing surface thereof; a second member with a vertebral disc contact surface and a protruding portion on an opposing surface thereof. The protruding portion of the second member engages with the recessed portion of the first member in use. A facet joint prosthesis is provided, including a first member for attachment to a first posterior lumbar disc in use and a second member for attachment to a second posterior lumbar disc in use, where at least a part of the first member is telescopically mounted in at least a part of the second member in use.
摘要:
A prosthesis of an anterior spinal column, comprising a perforated sleeve body (1) with at least one anchoring element, teeth and overgrowth holes and a positioner (2) situated within the body (1). The body (1) has in its wall at least one manipulative hole (6) and at least one positioning hole (7), whose longitudinal axes are parallel with each other. The positioner (2) comprises at least one situating element (8) cooperating with at least one positioning hole (7) of the body (1) and at least one hole (12) formed therethrough, which may be situated radially inward relative to the manipulative hole (6). At least one end face (3) of the body (1) or/and body's wall are provided with at least one pair of opposite guidelines (14,20). For introducing the prosthesis into the intervertebral space, a guiding instrument is used in the form of a rod with a shaped working element (24) at one end. The prosthesis may be implanted with the use of the prosthesis guiding instrument.
摘要:
Disclosed is an intervertebral disc prosthesis for the total replacement of a natural intervertebral disc within the lumbar and cervical spine, comprising of articulating sliding partners. The upper sliding partner has means for a firm assembly to an upper vertebral body and the lower sliding partner has means for a firm assembly to a lower vertebral body. At least one sliding surface is between two sliding partners. Two- and three-part functional designs are planned and both having in common, that, as a result of the shape of the articulating surface(s), the laterolateral and dorsoventral motion amplitudes differ. The resulting angles including the rotation around a fictitious vertical axis can be defined to a desired extent.
摘要:
A spinal device generally includes a spacing member and a fixing member. The spacing member is configured to maintain a space between adjacent vertebrae. The fixing member is adapted to maintain a position of the spacing member relative to the adjacent vertebrae. In addition, the fixing member includes a bendable portion releasably connected to the spacing member.