55 results about "Second tarsal bone" patented technology

An expandable bone device including first and second bone support elements, a manipulator positioned between the first and second bone support elements and connected to them by link members, the manipulator adapted to move the first and second bone support elements between a collapsed orientation and an expanded orientation, wherein in the collapsed orientation the first and second bone support elements are drawn towards the manipulator and in the expanded orientation the first and second bone support elements are moved outwards away from a longitudinal axis of the manipulator, and deformable support struts connected between the manipulator and the first and second bone support elements that deform when moved by the manipulator from the collapsed orientation to the expanded orientation and vice versa, wherein in the expanded orientation the deformable support struts form a structure that maintains the first and second bone support elements in the expanded orientation.

A method and apparatus for stabilizing first and second adjacent bone portions. The method includes the steps of: providing a spacer; providing a stabilizer, with the spacer and stabilizer configured to be movable guidingly, one relative to the other, between a pre-assembly relationship and an operative relationship; and placing the spacer and stabilizer into an operative relationship with the first and second adjacent bone portions. As an incident of the spacer and stabilizer being changed from their pre-assembly relationship into the operative relationship with each other and the first and second bone portions, the spacer, stabilizer and first bone portion cooperate to cause the first bone portion and spacer to be urged towards each other. The method may be carried out by moving the stabilizer and spacer, and all auxiliary parts and handling and assembling instruments, substantially in a single plane along one line or parallel lines.

An implantable fixation system for fusing a joint between a first bone and a second bone. The system may include an anchor, standoff, bolt, and cortical washer. The system may be implanted across the joint along a single trajectory, the length of the system adjustable to provide compressive force between the anchor and the cortical washer. The system may be implanted across a tibiotalar joint with the anchor positioned in the sinus tarsi. A spacing member may be inserted between the two bones and the fixation system implanted to extend through an opening in the spacing member. The spacing member may be anatomically shaped and / or provide deformity correction. An ankle arthroplasty system may include a tibial plate, a talar plate, and a bearing insert. The plates may be anchored to the tibia and talus along a single trajectory. The ankle arthroplasty system may be revisable to a fusion system.

A bone screw assembly includes a first bone screw, second bone screw, and a coupler. The first bone screw defines a first axis and the second bone screw defines a second axis. The coupler is operably associated with the first bone screw and the second bone screw. The coupler is adapted to mount the first bone screw and the second bone screw to adjacent bone structures. The first axis of the first bone screw and the second axis of the second bone screw define an angle therebetween. The first bone screw and the second bone screw are securable to each other.

The invention relates to an implant (1) for osseous fusion between two bones, including a first portion (20) having a longitudinal axis A, for being inserted in the first bone and including a first means (24) for attaching said implant in said first bone, and a second portion (30) having a longitudinal axis B, for being inserted in the second bone and including a second means (34) for attaching said implant in said second bone, said first and second portions (20, 30) being connected by a central core (40), said central core being a solid body, the cross-section of which, in a plane perpendicular to said longitudinal axis A, has the shape of a star having at least three points (41, 42, 43), said first portion having three tabs (21, 22, 23), each tab extending along said longitudinal axis A from the free end (41a, 42a, 43a) of one of the points of said central core.

An orthopedic prosthesis, system and method has a dual bearing component that, along with first and second bone anchoring components, provides multi-axial movement separately with respect to both the first and second bone anchoring components. An ankle prosthesis, system and method may thus be fashioned utilizing these principles that includes a dual bearing component, a tibial component adapted for attachment to the tibia bone, and a talar component adapted for attachment to the talus or calceneus bone of the foot. The dual bearing component includes a superior bearing providing gliding articulation / translation between it and the tibial component, and an inferior bearing providing gliding articulation / translation between it and the talar component. A bearing component plate provides a base or foundation for the superior and inferior bearings. The superior bearing is bonded to the bearing component plate while the inferior bearing moves with respect to the bearing component plate.

A unilateral fixator for adjustment of a first bone portion relative to a second bone portion. The fixator includes a telescopically adjustable strut having first and second ends and a strut axis, and first and second compound joints. The first compound joint is coupled to the first end of the strut and to a first bone clamp, and includes a first gear mechanism controlling linear and rotational motion of the first bone clamp relative to first and second axes while the first bone clamp is engaged with the first bone portion. The first and second axes are generally orthogonal to one another and to the strut axis. The second compound joint is coupled to the second end of the strut and to a second bone clamp and includes a second gear mechanism controlling linear and rotational adjustment of the second bone clamp. The first compound movable joints can rotate about the strut axis.

A device for fixation of bone tissue and methods of using same are provided. The device includes a first anchor positionable within a first bone region, a second anchor positionable within a second bone region and a wire interconnecting the first and second anchors. The wire is attached to the first anchor via an elastically deformable element having a force constant (K) of 20-80 N / mm along a longitudinal axis of the first anchor.

An orthopedic prosthesis, system and method has a dual bearing component that, along with first and second bone anchoring components, provides multi-axial movement separately with respect to both the first and second bone anchoring components. An ankle prosthesis, system and method may thus be fashioned utilizing these principles that includes a dual bearing component, a tibial component adapted for attachment to the tibia bone, and a talar component adapted for attachment to the talus or calceneus bone of the foot. The dual bearing component includes a superior bearing providing gliding articulation / translation between it and the tibial component, and an inferior bearing providing gliding articulation / translation between it and the talar component. A bearing component plate provides a base or foundation for the superior and inferior bearings. The superior bearing is bonded to the bearing component plate while the inferior bearing moves with respect to the bearing component plate.

Devices and methods are provided for positioning and forming bone tunnels. In one embodiment, a surgical drill guide apparatus is provided. The apparatus can include a first guide member having a longitudinal passageway extending therethrough for aiming a first guide pin along a first path to form a first bone tunnel. The apparatus can also include a second guide member having a longitudinal passageway extending therethrough for aiming a second guide pin along a second path to form a second bone tunnel. The first and second guide members can extend at an angle relative to one another and they can be offset such that axes of the guide members do not intersect.

The invention relates to an implant (1) for osseous fusion between two bones, including a first portion (20) having a longitudinal axis A, for being inserted in the first bone and including a first means (24) for attaching said implant in said first bone, and a second portion (30) having a longitudinal axis B, for being inserted in the second bone and including a second means (34) for attaching said implant in said second bone, said first and second portions (20, 30) being connected by a central core (40), said central core being a solid body, the cross-section of which, in a plane perpendicular to said longitudinal axis A, has the shape of a star having at least three points (41, 42, 43), said first portion having three tabs (21, 22, 23), each tab extending along said longitudinal axis A from the free end (41a, 42a, 43a) of one of the points of said central core.

A bone support apparatus includes a first bone connector with a first bone cradle insert configured to contact a patient's bone and constructed of a resilient material, a second bone connector configured to contact a patient's bone, and an adjustable rod assembly having a first end connected to the first bone connector and a second end connected to the second bone connector. The adjustable rod assembly has a first elongated member, a second elongated member, and an expansion member with a first end adjustably connected to the first elongated member and a second end adjustably connected to the second elongated member. The distance between the first bone connector and the second bone connector is adjustable by moving at least one of the first end and the second end relative to the first and second elongated member.

A fastening device for compressing first and second bones together includes a first member configured to extend entirely through the first bone and having a shaft that includes a distal threaded portion and an unthreaded portion. The threaded portion has an outer diameter that is not larger than the diameter of the unthreaded portion. A second member has a first threaded portion for securing to the second bone and a second threaded portion for engaging the threaded portion of the first member while the first member extends entirely through the first bone to secure the first and second members together and compress the first and second bones.

A method and apparatus for stabilizing first and second adjacent bone portions. The method includes the steps of: providing a spacer; providing a stabilizer, with the spacer and stabilizer configured to be movable guidingly, one relative to the other, between a pre-assembly relationship and an operative relationship; and placing the spacer and stabilizer into an operative relationship with the first and second adjacent bone portions. As an incident of the spacer and stabilizer being changed from their pre-assembly relationship into the operative relationship with each other and the first and second bone portions, the spacer, stabilizer and first bone portion cooperate to cause the first bone portion and spacer to be urged towards each other. The method may be carried out by moving the stabilizer and spacer, and all auxiliary parts and handling and assembling instruments, substantially in a single plane along one line or parallel lines.

A system for preparing an ankle bone to receive an ankle prosthesis is provided. The system includes a patient specific cutting guide that has an anterior surface, a posterior surface, and at least one cutting feature extending through the guide from the anterior surface. The posterior surface comprising a first protrusion or other member that extends from a first end fixed to the posterior surface to a second end disposed away from the first end of the first protrusion. The posterior surface has a second protrusion or other member that extends from a first end fixed to the posterior surface to a second end disposed away from the first end of the second protrusion. The first and second protrusions are spaced apart and have a length such that when the patient specific cutting guide is coupled with first and second bone references, which can include bushings implantable in bones, a clearance gap is provided between the posterior surface and the ankle bone.

A minimally invasive, percutaneous system that allows for dynamic stabilization of the spine is provided, together with methods of using the system. The system comprises a first bone anchoring member that is anchored in a first vertebra, and a second bone anchoring member that is anchored in a second, adjacent, vertebra. The first and second bone anchoring members include a first head portion and second head portion, respectively, that are designed to hold first and second ends of a flexible, elongated member, or cord. In certain embodiments, the cord is provided with a stiffened, relatively inflexible, end portion that is fixedly attached to the cord and that facilitates threading of the cord through the first and second head portions.

A bone alignment implant includes a first bone fastener with a first bone engager that is adapted for fixation into the metaphyseal bone and a second bone fastener with a second bone engager that is adapted for fixation into the diaphyseal bone. A link connecting the two fasteners spans across the physis. Alternatively, the bone alignment implant is adapted for fixation into the diaphyseal sections of two adjoining vertebral bodies. These implants act as a flexible tethers between the metaphyseal and the diaphyseal sections of bone during bone growth. These implants are designed to adjust and deform during the bone realignment process. When placed on the convex side of the deformity, the implant allows the bone on the concave side of the deformity to grow. During the growth process the bone is then realigned. A similar procedure is used to correct torsional deformities.

An implant for fusing a joint between first and second bone portions. The implant includes a screw member, and a washer polyaxially rotatable relative to the screw member. The screw member includes a head, a lag zone, and a threaded engagement zone. The implant includes a fusion zone for joint compression, extending from the washer to the proximal end of the engagement zone. Fenestrations may be present in the fusion zone. The length of the fusion zone ranges from about 10 mm to about 37 mm. Different surface finishes including roughened and non-roughened may be applied selectively to selected portions of the implant. In an embodiment, the joint is a sacro-iliac joint, and upon implantation the implant extends from the exterior of the ilium, across the joint and into the sacral vertebral body. Instrumentation and methods for preparing the joint and implanting the implant are disclosed.

The present invention discloses an anterior transpedicular bone fixation device (100) including a first plate (105) having at least one fastener hole (120a) configured to receive at least a portion of a first bone fastener and a first rotatable eccentric member (112). The first eccentric member has a first aperture (106) for receiving at least a portion of a central fastener (108). A second plate has at least one fastener hole (120c) configured to receive at least a portion of a second bone fastener and a second rotatable eccentric member (114) with a second aperture (107) for receiving at least a portion of the central fastener, wherein the first and second rotatable eccentric members enable the first plate and second plate to translation with respect to one another. The orientation of the first plate with respect to the second plate can be fixed by advancing the central fastener through the apertures.

The invention relates to the field of medical instruments and discloses a ligament reestablishing system. After a ligament is reestablished for the first time by using the ligament reestablishing system, the ligament can be quickly replaced through a small incision outside a joint without using an arthroscope if a revision surgery needs to be carried out on the ligament. Because the technology has the character of quick revision, a ligament substitute material is not needed to be firmly combined with a bone channel any longer, so the ligament reestablishing system provides possibilities for reliable use of artificial materials except autologous / allogenic tendons. Moreover, the difficulty and cost of the revision surgery are reduced, the hospital time is reduced, and the indication of ligament reestablishment is expanded. The ligament reestablishing system comprises a first endosteal hollow channel, a second endosteal hollow channel, a ligament substitute, a first fixing piece and a second fixing piece. A bone penetrating through the near end of the joint and a bone penetrating through the far end of the joint are implanted into the first endosteal hollow channel and the second endosteal hollow channel respectively. The ligament substitute is placed into the first endosteal hollow channel and the second endosteal hollow channel.

A system for ligament reconstruction includes placing a first jig having a first plurality of drill guide holes on a first bone of the joint, forming two intersecting holes in the first bone using the first plurality of drill guide holes, placing a second jig having a second plurality of drill guide holes on a second bone of the joint, forming a tunnel and a first branch hole and a second branch hole in the second bone using the second plurality of drill guide holes, placing a tendon having sutured ends through the two intersecting holes, extending the sutured ends through the tunnel and through the first and second branch holes so that the first and second ends of the tendon are positioned within the tunnel, and affixing the tendon within the tunnel. The apparatus of this system has specially formed jigs placed over bones.

Prosthetic ligament (11) for replacing a natural articular ligament, comprising a first intraosseous end part (12), called the tibial end part, and a second intraosseous end part (12'), called the femoral end part, the two intraosseous end parts (12, 12') surrounding an intraarticular central part (13), characterized in that the first intraosseous end part (12) is in the form of two cylindrical strands (12a, 12b), and in that the second intraosseous end part (12') forms a loop connected to the first intraosseous end part (12) via the intraarticular central part (13), which is composed of at least two bundles of technical filaments, each of the bundles being connected to the first intraosseous end part (12) at one of its ends and to the second intraosseous end part (12') at the other of its ends.

An orthopedic apparatus is provided for bridging a first bone unit to a second bone unit. The apparatus is demonstrated on a finger joint, wherein one of the bones and / or ligaments and / or tendons of the joint is / are injured. A method for implanting and using the apparatus also is presented. The apparatus includes a reformably deformable span portion which is generally circular and preferably rhombic. By deforming or reforming the span portion, it can be repositioned laterally, and / or it can be rotated to allow range of rotary motion so as to promote healing.

A surgical distance adjusting assembly for a distractor has a base having a first connecting portion configured to hold a first bone attachment member and a carrier having a second connecting portion configured to hold a second bone attachment member. The base and the carrier are movable relative to each other, wherein the first and second connecting portions provide a releasable mechanical coupling to the first and second bone attachment members. The releasable mechanical coupling comprises a hook member at one or both of the first and second connecting portions and configured to engage the respective bone attachment member. Alternatively, the releasable mechanical coupling comprises an opening at one or both of the first and second connecting portions. The opening has a thread for a fixation screw configured to releasable couple the respective bone attachment member to the respective connecting portion.

An implant (30) for a mammalian bone joint (3) for spacing a first bone (2) of the joint from a second bone (1) of the joint while allowing translational movement of the second bone in relation to the first bone is described. The implant comprises (a) a distal part (31) configured for intramedullary engagement with an end of the second bone, (b) a proximal part (34) having a platform (15) configured for non-engaging abutment of an end of the first bone and translational movement thereon, and (c) an articulating coupling (10, 16) provided between the distal and proximal ends allowing controlled articulation of the first and second bones. The bone-abutting platform is shaped to conform to and translate upon the end of the first bone. A kit for assembly to form the implant of the invention, and the use of the implant to treat osteoarthritis in a bone joint, are also described.

Devices and methods for treating degenerative conditions of the spine or for alleviating pain or discomfort associated with the spinal column are disclosed. In particular, laminoplasty fixation devices and methods are disclosed. Also disclosed, is a vertebral implant comprising a first bone engaging portion configured for securing to a first cut portion of a vertebra and a second bone engaging portion configured for securing to a second cut portion of the vertebra. A body portion is provided for associating the first and second bone engaging portions at a preselected spacing from each other, wherein the implant is adjustable to select said spacing.

A closure system may secure a first bone portion to a second bone portion. The closure system may include a band, a locking terminal, and a tensioning device. The band may be adapted to be looped around the first and second bone portions. The locking terminal may fixedly engage a first portion of the band and selectively fixedly engage a second portion of the band. The tensioning device may include a body and a threaded rod. The threaded rod may be received in the body and may engage the band such that movement of the threaded rod relative to the body moves the second portion of the band relative to the first portion of the band.