摘要:
A posterior spinal fusion system may include a plurality of cannulas that mate with cages polyaxially coupled to pedicle screws. The cannulas maintain access to the pedicle screws to facilitate percutaneous insertion of a fusion rod into engagement with the cages. Each cannula has a pair of blades that may be held together by an abutment member that at least partially encircles the blades. Each abutment member abuts the skin to define a variable subcutaneous length of the corresponding cannula. Each abutment members is also lockably removable from the corresponding blades to enable the blades to pivot with respect to the connecting element to a position in which they can be withdrawn from the connecting element. The blades of each cannula are spaced apart to provide first and second slots of each cannula, through which the fusion rod can be percutaneously inserted.
摘要:
A graft ligament strand tensioner includes a frame member for slidingly retaining loops of sutures extending from graft ligament strands. The tensioner further includes a collar portion, and is provided with a handle having a core portion on which the collar portion is disposed for axial movement, and a grip portion. The tensioner still further includes a spherical member connected to the handle and having rounded surfaces facing the collar portion. The collar portion is tiltingly movable on the spherical member rounded surfaces when manipulation of the handle, to pull sutures on the frame member taut, causes the collar portion to engage the spherical member rounded surfaces. The sliding retention of the sutures and the tilting movement of the collar portion provide substantial equalization of tension in the sutures and thereby the graft ligament strands.
摘要:
The present invention provides an intervertebral implant for replacing intervertebral disc material and controlling relative motion between adjacent vertebral bodies. The intervertebral implant may have at least one end plate and an intermediate component which slides into engagement with the end plate. The intermediate component may be engageable with the end plate from an anterior approach, or a right or left lateral approach. The intermediate component can be a set of bearing surfaces which articulate to provide relative motion between two vertebral bodies, an elastic insert which deforms to provide motion between two vertebral bodies, or a rigid insert which prevents relative motion between two vertebral bodies. The intermediate component is replaceable with a different intermediate component which provides a different function. The present invention also provides one or more retaining members which snap into engagement with the end plate and secure the intermediate component to the end plate.
摘要:
A dilating system for dilating bodily tissue includes a elongate tubular first dilator and a elongate tubular second dilator. The second dilator has an outer diameter greater than the outer diameter of the first dilator, the first dilator being configured to be received within the second dilator. In one embodiment, a first mating member is formed on the exterior surface of the first dilator while a second mating member is formed on the interior surface of the second dilator. The first mating member engages with the second mating member when the second dilator is passed over the first dilator so as to cause the second dilator to travel along a fixed path relative to the first dilator.
摘要:
A milling system for use in resecting at least a portion of a joint articulation surface of a bone includes an alignment guide having a top surface and an opposing bottom surface with an opening extending therebetween. Fasteners are used to secure the alignment guide to the bone so that the alignment guide is suspended above the bone. A template is removably mounted to the alignment guide so that a plurality of guide paths extending through the template are aligned with the opening in the alignment guide. A mill extends down through the guide path and has a burr on the end thereof for resecting the bone.
摘要:
A milling system for use in resecting at least a portion of a joint articulation surface of a bone includes a template having a base with a top surface, an opposing bottom surface, and an opening extending therebetween. One or more fasteners are used to removably mount the template on a bone. A guide is movably mounted on the template and projecting across at least a portion of the opening of the template. The guide is selectively movable across at least a portion of the opening of the template. A rotatable mill is mounted on the guide. The mill is selectively movable along at least a portion of the length of the guide.
摘要:
An implant for resurfacing at least a portion of an articulation surface of a bone includes a body having a first side with a top articular surface and an opposing second side with a bone apposition surface. The bone apposition surface is adapted to bias against a natural or resected articulation surface of a bone. An elongated flexible first line is coupled to and extends from the body.
摘要:
A guide assembly for forming a tunnel through a proximal end of a tibia includes a brace having a first end and an opposing second end. A template is mounted on the first end of the brace. The template is adapted to rest on a lateral or medial facet at a proximal end of the tibia. A tubular guide sleeve has a proximal end and an opposing distal end. The tubular guide sleeve is adjustably mounted on the second end of the brace such that when the template is disposed on the lateral or medial facet of the tibia, the distal end of the tubular guide sleeve can be selectively biased against a leteral, media, or anterior side of a proximal end of the tibia.
摘要:
A method for mounting a tibial condylar implant includes forming a tunnel having a proximal end on a lateral, medial, or anterior side of a proximal end of the tibia and a distal end on an at least partially resected lateral or medial facet at the proximal end of the tibia. A condylar implant is positioned over the distal end of the tunnel. A fastener is advanced into the tunnel from the proximal end of the tunnel. The fastener which is at least partially disposed within the tunnel is secured to the condylar implant.