A pivotal bone anchor assembly includes a shank with a head, an anchor portion, and a neck extending between the head and the anchor portion, and a receiver with upright arms defining a channel for receiving a rod and a central bore extending downward to a lower portion of the receiver. The assembly also includes a retaining structure rotatably coupled with the receiver with an internal seating structure pivotally supporting the head while providing for independent rotation of the shank prior to locking the assembly with the rod and a closure. The retaining structure includes an external surface and a slot extending between the seating structure and the external surface with a concave cut-out configured to closely receive the neck so as to provide for increased articulation between the shank and the receiver along the slot, and with the shank and the retaining structure being rotatable together around a centerline axis to align the increased articulation in any radial direction around the circumference of the receiver.

The present invention relates to a crescent or tri-corner shaped orthopedic plate with at least a first and a second end, and generally coextensive top and bottom surfaces joined directly or indirectly by an edge. The plate includes a plurality of fixation holes the first end of the plate and a second end of the plate that receives locking screws and intermediate the two holes, the plate includes a recess that defines a screw hole edge at an angle relative to the top surface of the plate so as to receive and support a screw in the recess. The invention further relates to a method of fusion using the plate and a clamp designed for the method.

A joint prosthesis implant includes a main body made mainly of ceramic and comprising a joint outer surface made of ceramic, of concave or convex shape, at least one tightening screw configured to tighten the main body on the patient's bone or on an intermediate element attached to said bone, and at least one added ring in the main body configured to distribute homogeneously in the main body the mechanical stresses caused by tightening the tightening screw.

A fiducial marker includes a fastener and a feedback component to provide a registration signal when engaged by a probe. The feedback component includes light-up cap, a conducting component, a magnetic component and an RFID tag. A cap for registering fiducial markers with robotic surgical systems includes a housing, a socket in the housing for coupling to a fastener, an access port in the housing, a switch disposed in the housing proximate the access port, and a sensory indicator device coupled to the switch, wherein the sensory indicator device produces a signal when activated through the access port to confirm marker contact. Methods of registering a fiducial marker fastener, such as with robotic surgical systems, include manipulating a probe to align with a signal-producing feedback component attached to or integrated with the fastener, and engaging the feedback component with the probe to activate a sensory feedback indicator.

Instruments and methods for delivering bone cement are disclosed herein. In one exemplary embodiment, the instrument includes a cannulated bone screw having a head that is configured to be received within a rod receiver and a shank extending distally from the head and configured to extend distally from the rod receiver, a cannulated shaft having a distal end configured to extend into the shank of the cannulated bone screw and a proximal end configured to couple to a bone cement delivery system, and a retaining sleeve disposed around at least a portion of the cannulated shaft. The head of the bone screw has proximal and distal recesses therein, and a distal end of the retaining sleeve is configured to couple to the proximal recess.

A coupling device for coupling a rod to a bone anchor includes a receiving part configured to receive a head of the bone anchor, the receiving part having a first end and a second end, a central axis that extends between the first and second ends, and two legs at the first end that define a recess extending in a longitudinal direction transverse to the central axis for receiving the rod, and a monolithic pressure member positionable in the receiving part, the pressure member including a rod support surface and an engagement portion to adjust the pressure member to exert pressure on the head. The engagement portion is positioned farther radially from the central axis in the longitudinal direction than a first portion of the rod support surface, and extends closer axially to the first end of the receiving part than the entire first portion of the rod support surface.

Systems, devices and methods are provided for implanting medical devices into patients. The systems, devices and methods are particularly useful for orthopedic implants, such as spinal implants that facilitate fusion of bone segments. A fixation assembly for an implant comprises a screw having a head and a shaft, and a washer having at least one outer surface with one or more frictional elements for engaging a surface of the implant. The shaft includes one or more projections that cooperate with the washer to prevent the washer from sliding back down the screw, while allowing for easy application of the washer to ensure optimal placement and desired contact with the screw head. The washer and/or the screw head may also include interlocking cams that create a wedge effect that inhibits the screw from backing out or loosening from a hole in bone or other tissue.

This set comprising: an anatomic articulating member, having a concave articulating surface intended to articulate with a complementary humeral implant and having an anatomic coupling feature, a reversed articulating member, having a convex articulating surface intended to articulate with a complementary humeral implant and having a reversed coupling feature that is shaped differently from the anatomic coupling feature, and an anchorage member intended to be anchored in a human glenoid, the anchorage member including a body which defines a proximodistal axis and has inner bore extending along the proximodistal axis, the body being provided within the inner bore with both an inner first feature that is designed to cooperate with the anatomic coupling feature when the anatomic coupling feature is introduced within the inner bore, so as to fixedly couple the anchorage member with the anatomic articulating member, and an inner second feature that is designed to cooperate with the reversed coupling feature when the reversed coupling feature is introduced within the inner bore, so as to fixedly couple the anchorage member with the reversed articulating member, the first feature and the second feature being distinct from each other. The body is operable to be axially introduced into the glenoid before being coupled indifferently with one or the other of the anatomic and reversed articulating members.

A receiver assembly includes a receiver having a first channel, a through-space with internal recesses beneath a guide and advancement structure, and internal ridges projecting inwardly below the internal recesses. The assembly also includes an insert having a second channel, side structures protruding laterally outward below top surfaces, and opposed lower extensions extending downwardly below the second channel, with the insert being loadable into the through-space with the second channel in non-alignment with the first channel. The insert is the non-threadably rotatable within the through-space to align the second channel with the first channel and to move the side structures into the internal recesses above the internal ridges, with subsequent downward displacement of the insert within the through-space causing the opposed lower extensions to engage the capture head of a bone anchor with a frictional engagement that inhibits the bone anchor from moving upward within the through-space.

This disclosure includes apparatus and methods to attach an orthopedic device to a bone. The method can comprise locating a baseplate on a glenoid of a patient, the base plate including at least a first fastener bore, creating a first post hole in the glenoid for locating a first fixation post, the first fixation post including a quasi-spherical head and a porous metal sleeve, and driving the first fixation post through the first fastener bore and into the first post hole. The porous metal sleeve can engage the first post hole and the quasi-spherical head can contact at least the first wall of the first fastener bore to removeably lock the quasi-spherical head to the baseplate. Driving the first fixation post can create an initial compression between the baseplate and the glenoid. The porous metal sleeve can receive bone ingrowth to maintain the initial compression.