Abstract: A bone plate assembly including at least one bone plate, polyaxially adjustable fixation elements and a polyaxially adjustable locking mechanism. A first plate includes at least one polyaxial element for lockable connection with a fixation pad, and a connection feature which allows the plate to translate and polyaxially rotate relative to the locking mechanism. A second plate includes at least one polyaxial element for connection with a fixation pad and a connection feature for non-rotatable connection with the locking mechanism. The locking mechanism allows translation and polyaxial adjustment of the first plate relative to the second plate and locks the first and second plates via a taper lock. The fixation pad includes a deflectable spacer configured to prevent premature locking of the pad. Methods for implantation of the bone plate assembly between bone structures are disclosed. Instrumentation for implantation, compression and locking of the bone plate assembly is disclosed.

Abstract: Surgical instruments providing access to delicate tissue, such as brain tissue, through a transcutaneous channel. A surgical access assembly has a pin component removably fastened to a cannula component such that rotational forces are translated between the pin component and the cannula component. The pin component is adapted to receive and secure a guide-pin component from a navigation system to assist in the proper initial placement of the surgical access assembly. The cannula component has features on the outer surface configured to facilitate insertion and retention of the surgical access assembly in the target delicate tissue. When desired, pin component can be removed from cannula component to reveal an inner cavity configured to provide access to the target delicate tissue and a working channel for the particular procedure to be performed.

Abstract: A bone plate assembly including at least one bone plate, polyaxially adjustable fixation elements and a polyaxially adjustable locking mechanism. A first plate includes at least one polyaxial element for lockable connection with a fixation pad, and a connection feature which allows the plate to translate and polyaxially rotate relative to the locking mechanism. A second plate includes at least one polyaxial element for connection with a fixation pad and a connection feature for non-rotatable connection with the locking mechanism. The locking mechanism allows translation and polyaxial adjustment of the first plate relative to the second plate and locks the first and second plates via a taper lock. The fixation pad includes a deflectable spacer configured to prevent premature locking of the pad. Methods for implantation of the bone plate assembly between bone structures are disclosed. Instrumentation for implantation, compression and locking of the bone plate assembly is disclosed.

Abstract: A cranial flap fixation system and method are provided. In one embodiment, the system includes a rod having first and second ends, and an intermediate portion. The rod has a threaded portion between the first end and the intermediate portion. The system also includes an inferior disk coupled with the rod, proximate the first end of the rod, and a superior disk with an orifice through a central region of the superior disk. The orifice is sized to allow the superior disk to engage the threaded portion and movably couple the superior disk to the rod. The system further includes an installation tool having a central cavity. The installation tool is configured to engage the superior disk and the threaded portion, such that rotation of the installation tool in a first direction directs the superior disk toward the inferior disk.

Abstract: Apparatus, systems, and methods for spine surgery employ a guide wire temporarily anchored to a contralateral side of an intervertebral disc. The guide wire establishes a reliable pathway for passage and actuation of cannulated instruments or implants through a small working channel leading to an ipsilateral side of the disc. The guide wire may be disconnected and removed from the disc after use.

Abstract: A bone plate assembly including at least one bone plate, polyaxially adjustable fixation elements and a polyaxially adjustable locking mechanism. A first plate includes at least one polyaxial element for lockable connection with a fixation pad, and a connection feature which allows the plate to translate and polyaxially rotate relative to the locking mechanism. A second plate includes at least one polyaxial element for connection with a fixation pad and a connection feature for non-rotatable connection with the locking mechanism. The locking mechanism allows translation and polyaxial adjustment of the first plate relative to the second plate and locks the first and second plates via a taper lock. The fixation pad includes a deflectable spacer configured to prevent premature locking of the pad. Methods for implantation of the bone plate assembly between bone structures are disclosed. Instrumentation for implantation, compression and locking of the bone plate assembly is disclosed.

Abstract: A system for securing bones together across a joint includes a transfixation screw and a plate. The plate includes an elongate spine having a transfixation screw hole disposed along the spine. The transfixation screw hole includes an inner surface configured to direct the transfixation screw through the transfixation screw hole such that the transfixation screw extends alongside the bridge portion at a trajectory configured to pass through a first position on the first bone and a second position on the second bone once the plate is placed across the joint. The transfixation screw includes a head configured to abut the inner surface of the transfixation screw hole and a shaft configured to contiguously extend through the first bone, across the joint, and into the second bone.

Abstract: An improved fixation plate using at least a double helix screw as disclosed. The double helix screw may include alternate embodiments comprising three, four, or more threads. The helix thread screw intertwines with double helix thread in the screw hole of the fixation plate providing enhanced fixation to a fractured bone.

Abstract: The present disclosure provides methods and devices that allow for rotational control, compression and fusion of the ankle as required for treatment while providing additional mobility in the movement of the foot. The devices of the present disclosure are configured to go through the talus and tibia for fusion of ankle joint while avoiding the calcaneus and subtalar joint. According to a first aspect, exemplary embodiments of the present disclosure are curved to provide sufficient area for rotational control and compression of the ankle bones. According to a second aspect, exemplary embodiments of the nails of the present disclosure are configured to be placed at an angle with respect to the intramedullary canal.

Abstract: Systems for trauma and/or joint fusion implants and instruments include transarticular screw and intra-articular washer, polyaxial screw and plate, single- and multi-level polyaxial bone clamps, and minimally invasive adaptations.

Abstract: A medical implant includes a body having a conical portion and adapted for implantation into a person's body. A plurality of threads formed around an exterior surface of the conical portion of the body are adapted to help secure the implant in place within the person's body.

Abstract: A system for lockably engaging bone screws into a fixation plate may include a locking fixation plate including a threaded screw hole defined by an inner surface surrounding the threaded screw hole, the inner surface comprising an upper countersink and a threaded portion, the threaded portion comprising a pair of threads arranged in a double helix configuration, and a screw comprising a generally conical head tapering into a generally cylindrical shaft that ends at a tip and a single thread beginning near the tip and extending along the generally cylindrical shaft and onto the generally conical head, a thread height of the single thread being constant over a majority of the generally cylindrical shaft and tapering as the thread extends onto the head.

Abstract: According to one example embodiment, a radial fusion plate includes a first portion and a fusion portion. The first portion is configured to conform to a dorsal side of a radius bone between a second compartment and a fourth compartment of the radius bone. The fusion portion is distal to the first portion and configured to conform to a scaphoid and a lunate. The first portion includes scaphoid hole and a lunate hole.

Abstract: Embodiments of the invention are directed to a maxillary implant for advancement, expansion and stabilization of repositioned bone sections of a maxilla. According to embodiments, a maxillary implant includes a first plate having a bone attachment portion. The bone attachment portion has a bone contacting surface defining a first plane and one or more screw holes. The first plate has a coupling portion defining a second plane and has a post-opening. The maxillary implant includes a second plate having a top panel and two side panels. The two side panels each has a bone contacting surface defining respective third and fourth planes and one or more screw holes. The maxillary implant has a post projecting from the top panel in the posterior direction. The post and the post-opening jointly form an interface which allows the first and second plates to be adjustable relative to each other.

Abstract: An ulnar fixation plate includes a head portion configured to conform to a volar side of an ulnar bone proximate to an ulnar head, the head comprising of first head portion configured to receive a first fixation device, a second head portion configured to receive a second fixation device, and a shaft portion coupled to the head portion with the shaft portion configured to conform to the volar side of the ulnar bone.

Abstract: A screw system includes a screw and a washer assembly captive to the screw. The washer assembly is polyaxially pivotable relative to the screw. The screw may be freely rotated in one direction relative to the washer assembly, but frictionally binds with the washer assembly when rotated in a second direction.

Abstract: A system for securing bones together across a joint includes a transfixation screw and a plate. The plate includes an elongate spine having a transfixation screw hole disposed along the spine. The transfixation screw hole includes an inner surface configured to direct the transfixation screw through the transfixation screw hole such that the transfixation screw extends alongside the bridge portion at a trajectory configured to pass through a first position on the first bone and a second position on the second bone once the plate is placed across the joint. The transfixation screw includes a head configured to abut the inner surface of the transfixation screw hole and a shaft configured to contiguously extend through the first bone, across the joint, and into the second bone.

Abstract: An apparatus for supporting a bone includes a plate configured for positioning on a tension side of the bone. Two or more fasteners are configured to extend from an opposite side of the bone to the plate, and engage the plate after extending through the bone. The plate has an attachment mechanism operable to engage with the fasteners. In other aspects, a method of performing a surgical procedure includes positioning a plate on a tension side of a bone, and forming a hole from an opposite side of the bone to the plate. A fastener is inserted through the hole to the plate, and the plate is adjusted into position on the bone surface on the tension side of the bone. One or more additional holes are formed from the opposite side of the bone to the plate, and one or more additional fasteners are inserted.

Abstract: Systems, methods, and kits incorporate a fusion member for vertebral processes. The fusion member may be unitary or modular. The fusion member comprises extensions configured to be crimped to vertebral processes. The extensions may comprise tabs configured to be deformed to further penetrate the vertebral processes. The tabs may also lock together modular components of the fusion member. The fusion member may comprise fasteners extending between the extensions. The fusion member may comprise a cage with a movable cover or a graft retention feature.

Abstract: A minimally invasive dilation device includes a stylus, a plurality of rigid arms radially arrayed about the stylus, and a dilating member positioned between the stylus and the arms. An outer flexible sleeve may be circumferentially secured to the arms, lying within or without the plurality of arms. An inner mesh may surround the stylus and dilating member. The device may be introduced into tissue toward a targeted area, while in a closed configuration. The dilating member may be a balloon or a cannula. During dilation, the arms are pushed radially outward, expanding the device and dilating the surrounding tissue. A cannula may be inserted inside the plurality of arms to keep the arms in an open configuration, and the stylus and inner mesh may be withdrawn, providing an open passageway through the device to the targeted area. The device may be used with a neural monitoring system.