105 results about "Right ulna" patented technology

A prosthetic elbow for replacing an elbow of a dog or a human to restore normal, pain-free joint function. The elbow includes a humeral component for attachment to a humerus and a radioulnar component for attachment to an ulna. The humeral component includes a generally cylindric spool having a contoured external surface defining a first articular surface. The radioulnar component has a generally U-shaped contour with an inner peripheral surface defining a second articular surface sized and shaped for engagement with the first articular surface. Positional guides provide for implantation at precise locations.

This invention relates to an elbow prosthesis comprising a humeral component forming a first, substantially cylindrical articulating surface and an ulnar component forming a second articulating surface adapted to be arranged around a part of this first articulating surface and to pivot about a longitudinal axis of this first articulating surface. The ulnar component is provided with the means for mounting a locking element forming a third articulating surface, extending the second articulating surface and adapted to be disposed around the first articulating surface, these second and third articulating surfaces extending together, in transverse section, over more than 180° about the first articulating surface.

A bone resection guide, particularly for an ulna, utilizes anatomical reference points of the ulna to establish an optimal position for a prosthesis. The bone resection guide provides a guiding instrument that allows a surgeon to remove only bone that needs to be removed for precise placement of the end prosthesis. A method of resecting bone from the ulna in preparation of prosthetic implantation using the bone resection guide matches an elbow axis finder with a particular size of an ulna fossa of the patient. Once matched, a sized resection template, directly related to the shape of the prosthesis, is used as a resection guide. Incorporated into the bone resection guide are known anthropometric qualities when providing resection surfaces. This enhances the probable position of the implant.

A humeral component, forming a first articulating surface, and an ulnar component forming a second articulating surface adapted to be disposed around a part of the first articulating surface and to pivot about its longitudinal axis. This ulnar component is provided with structure for mounting a locking element which forms a third articulating surface extending the second and adapted likewise to be disposed around a part of the first surface. These mounting structure comprise guiding structures adapted to cooperate with complementary structure provided on the locking element in order to guide this element in translation with respect to the ulnar component, up to a position where blocking structure provided respectively on the locking element and on the ulnar component may be employed to immobilize this element on this component, these blocking structure being able to be employed only in this position.

An articulating implant system is provided for fixation to a bone. The articulating implant system includes a fixation component for fixation to the bone and an articulating member for articulating against bone or cartilage. Specifically, a modular ulnar implant is provided in accordance with the articulating implant system of the present invention wherein the fixation component is a stem for insertion into the intramedullary canal of the distal ulna and the articulating member is a head for articulating with the radial sigmoid notch.

A bone plate includes a first three-part combination hole extending through a proximal portion of the plate, a first portion configured to engage a threaded head portion of a bone fixation element, a second portion configured to receive a bone fixation element along an axis substantially perpendicular to a longitudinal axis of the bone and a third portion defining a screw axis extending toward the distal end of the elongated body at a non-perpendicular angle relative to the longitudinal axis in combination with a first two-part combination hole extending through the proximal portion, a first threaded portion configured to engage a threaded head portion of a bone fixation element and a second portion defining an elongated slot extending along a longitudinal axis of the plate for receiving a bone fixation element so that the plate may slide along its longitudinal axis relative to the bone fixation element.

An apparatus and method for repairing osseous defects in such bones as the humerus, femur, ulna and long bones. A first embodiment presents one or more cannulated screws affixed to an intramedullary nail, which is installed in a humerus having an intraosseous void. In a second embodiment, one or more cannulated screws alone are inserted into a proximal humerus having an intraosseous void. Other embodiments teach one or more cannulated screws inserted into a damaged femur and attached to a plate or medullary rod. Another embodiment presents a number of cannulated screws used to attach a plate to a fractured long bone. In a final embodiment, a cannulated screw is installed in damaged ulna. In all embodiments, a bioresorbable or non-bioresorbable cement is injected into a hollow channel of the cannulated screw and extruded into the bone to stabilize the weakened bone and secure the position of a fixation device.

The present invention provides an ulnar osteotomy plate for use in an ulnar shortening osteotomy. The ulnar osteotomy plate includes an elongated metallic plate having tapered ends, wherein the plate is concave in a direction perpendicular to a main axis. The ulnar osteotomy plate further includes a plurality of holes along the main axis, wherein the plurality of holes includes a substantially elliptical hole with a beveled interior edge located on a first side of the plate and a threaded hole located on a second side of the plate. A first screw is inserted into one end of the elliptical hole and further into an ulna underneath the plate, wherein the first screw includes a beveled edge underneath a head. A second screw is inserted into the threaded hole and further into the ulna, wherein the second screw includes a portion of the shaft near a head to be threaded.

The application relates to the technical field of bone maturity analysis, and in particular to a bone age recognition method and system and an electronic device. The bone age recognition method includes the a step a of inputting a bone image into a target bone position detection model, and detecting position coordinates of a target bone in the bone image through the target bone position detectionmodel; a step b of cutting out a target bone image according to the position coordinates of the target bone; and a step c of inputting the target bone image into a bone stage classification model forbone age recognition. The bone age recognition method and system and the electronic device in the application adopt deep learning to automatically classify and recognize ulna and radius images withoutmanual intervention, improve the effectiveness and efficiency of bone age recognition and have better performance than the prior art; and also eliminate the need for manual acquisition, save more time and efforts, and are highly efficient.

A prosthetic implant for partial resurfacing of the ulna at the distal radioulnar (DRU) joint which comprises a stem and an ulnar head. The combination of the anchoring stem and the head that is shaped and proportioned to replace only a portion of the distal ulnar head and the radial articulating surface and to interface with the resected ulna at a proximal stabilizing surface provides excellent stability in the completed implant. In the preferred embodiment, a pair of strategically located surfaces aligned at an obtuse angle provides the stabilizing surface arrangement. The provision of a set of such implants with different head and stem sizes allows a surgeon to best accommodate the physiology of a particular patient and locate a resurfaced head section offset from the canal center in order to provide a convex articular surface adjacent the radius which will allow the radius to smoothly pivot and translate around such resurfaced ulnar head during pivoting of the forearm.

An ulnar assembly for use with a humeral component to form an elbow prosthesis is provided. The ulnar assembly includes a first component including a portion thereof defining a stem for implantation in a cavity formed in the ulna. The first component defines a longitudinal axis thereof generally coincident with the longitudinal axis of the ulna. The ulnar assembly also includes a second component attached to the first component. The second component is attachable and removable from the first component along the longitudinal axis of the first component. One of the first component and the second component include an external taper. The other of the first component and the second component defines an internal taper therein adapted to receive the external taper.

An artificial elbow joint including a humeral component made of metal and an ulnar component made of resins for replacing an elbow joint. The humeral component of this artificial elbow joint is configured by a substantially cylindrical trochlea and a stem extending from the trochlea that is inserted into the humeral; and the ulnar component is configured by a joint surface member which receives the trochlea of humeral component in a rotatable manner and a stem which extends from the joint surface member and is inserted into the ulna. The stem of the humeral component is curved gently downward overall so as to comply with the lordotic shape of the humeral, and the trochlea is turnable about the centerline of the stem.

A prosthetic elbow replacement includes a humeral component having a stem dimensioned to fit within a medullary canal of the humerus and having a yoke connected to the stem wherein the yoke terminates in spaced apart arms. A pivot pin is mounted between the arms for rotational movement with respect to the humeral component. The pivot pin has a transverse throughhole. There is an ulnar component having an ulnar stem including a distal end dimensioned to fit within a medullary canal of the ulna and an opposite proximal end dimensioned to fit within a first end opening of the throughhole. The ulnar component has a mounting cap dimensioned to fit within a second end opening of the throughhole. A fastener connects the ulnar stem and the mounting cap such the proximal end of the ulnar stem is positioned within the first end opening of the throughhole and the mounting cap is positioned within the second end opening of the throughhole. The pivot pin rotates to allow for flexion of the prosthetic elbow replacement, and also allows for axial rotation of the ulna component in the humeral component.

An elbow prosthesis is provided. The elbow prosthesis includes an ulnar component. The ulnar component has a first portion of the ulnar component that is implantable in a cavity formed in the ulna. The ulnar component has a second portion operabley associated with the first portion. The elbow prosthesis also includes a humeral component having a first portion of the humeral component that is implantable in a cavity formed in the humerus. The first portion of the humeral component defines a longitudinal axis of the first portion and a second portion of the humeral component. The humeral component also has a second portion operably connected to the second portion of the ulnar component. The second portion of the humeral component is rotatably connected to the first portion of said humeral component about the longitudinal axis.

An osteosynthesis device is provided, which, while being a single device, is wide in a range of fixing positions or fixing methods that can be selected in a repositioning operation, enables firm fixation of an affected portion, and alleviates feeling of discomfort felt at the affected portion after the operation.

An osteosynthesis device D1 is a device used, in case of fracture of an olecranon side of an ulna, to fix and reposition respective bone fragments and includes an intramedullary nail 1 inserted into the ulna 3, an end plate 2a mounted on an outer surface of the ulna at the olecranon 31 side, and a threaded screw N1 arranged to screw on the end plate to the intramedullary nail. Screws S are used in combination with the osteosynthesis device D1 to fix, etc., the inserted intramedullary nail 1 onto the ulna 3. The intramedullary nail 1, which is a round rod body having a tapering tip end portion and has a thickness enabling entry into the marrow of the ulna and a predetermined length, includes a threaded hole 111 formed in a base end surface 101, long holes 114 and 115 formed at a base end side with respect to a central portion of a circumferential surface 102, and circular holes 112, 113, 116, 117, and 118 formed at predetermined parts between a tip portion side and the base end side of the circumferential surface 102.

An improved means for fixation of a fractured coronoid process of the proximal ulna. A substantially rigid plate is secured to the anterior aspect of the proximal ulna relative to a fracture of the coronoid process of the ulna. The plate contains a hook feature at the proximal aspect and is positioned so that it extends over the proximal/anterior aspect of the coronoid process relative to the fracture. The plate has surfaces that define a plurality of openings through which suture and/or screws can pass. The openings may contain a recess at a side of the plate opposite the ulna. At least one hole is formed in the ulna. At least one anchor may be secured to a flexible device, positioned at a side of the plate opposite the ulna, secured to another anchor on the posterior aspect of the ulna and the flexible device tensioned. At least one screw may be inserted through the plate and into the coronoid process or a bone fragment securing it to the plate.

A sigmoid notch resurfacing prosthesis for application to the sigmoid notch of the distal radius. The sigmoid notch prosthesis generally includes a saddle and a radius portion for attachment to the distal radius. The saddle may be formed from ultra high molecular weight polyethylene or another durable self-lubricating material. The saddle includes an at least partially concave contoured depression having rounded edges that is securable to the radius portion. The saddle may be secured by a sliding notch snap fit design. The prosthesis may be adapted for articulation with the natural head of the ulna or with an ulnar head prosthesis that has replaced the ulnar head.

The invention discloses a humanoid upper limb based on pneumatic muscle. The pneumatic muscle simulates human muscle for driving a shoulder joint, an elbow joint and a wrist joint to move, and the function of completely simulating the motion of the upper limb of a person is achieved. The humanoid upper limb is composed of a rib, a vertebra, a shoulder blade, a humerus, a fibula, an ulna, a spherical hinge, the pneumatic muscle and a pneumatic muscle fixing plate; the pneumatic muscle of a humanoid upper limb girdle muscle drives the shoulder joint to retract and stretch, bend and extend, inwards rotate and outwards rotate; arm muscle drives the elbow joint to bend and extend, inwards rotate and outwards rotate, and meanwhile the arm muscle and the upper limb girdle muscle cooperatively drive the shoulder joint to inwards retract, outwards stretch, inwards rotate and outwards rotate; and forearm muscle drives the wrist joint to bend and extend and retract and stretch and drives the elbow joint to bend and extend, inwards rotate and outwards rotate. The humanoid upper limb is driven by the pneumatic muscle, has the beneficial effects of being compact in structure, clean and good in anti-explosion performance, and can be used for teaching demonstration, medicinal diagnosis and scientific research.

An orthotic protective device collectively including a base unit connected to a metacarpal unit by a hinge system designed to protect and prevent hyperextension and hyperflexion movements of the metacarpal, carpal, radius and ulna regions. The base unit and metacarpal unit includes a longitudinal support member and a casing, respectively, lined with at least one pad having a tongue. At least one releasable fastener is mated to the support member and casing and extends to the tongue of the pad.

Apertures of the base unit are mated and connected to apertures of the hinge system which form an articulated joint allowing the hinge system to move in an upward manner allowing for natural extension of the user's wrist and in a downward fashion for unlimited flexion motion. The base unit and the hinge system may both have at least one stop formed thereon; and as these stops come into contact with one another, it limits the flexion, extension and radial-ulnar deviation. Further, an aperture of the metacarpal unit is mated and fastened to an aperture in the hinge system by a swivel joint which allows for lateral movement of the user's wrist.

The present invention relates to a fixator for aligning and setting a fractured bone with an internal canal, such as a Colles' fracture of the radius. The fixator includes two positioning wires and at least one pinball fastener. An elongated portion of each wire is inserted through either the radial styloid process or the dorso-ulnar cortex and into the intramedullary canal. A shaped portion of each wire extends from the wrist. The lateral portion of the shaped portions are coplanar when viewed from above and their overlapping portions are in side-by-side relation when viewed from the side. The external portions are also preferably curved with concentric overlapping portions so that the fixator resembles a bracelet. When necessary, the fixator includes additional interfragmentary stabilizing wires that are securely joined to the positioning wires. Crimp sleeves can be used in conjunction with the pinballs to securely join the wires.

An artificial hand with multiple functions, no error operation and no complication is composed of such artificial units as finger bones, metacarpal bones, ulna, radius, muscle tendons, tendon sheaths, slide mechanism, muscles and skin. It can be connected to the crippled end of human radius by screw and its artificial muscle tendons can be linked with relative ones of human body by stitch.

The invention discloses a three-point or four-point bending fatigue test fixture for a living rat ulna. The fixture comprises a carrying disc and a foreleg uploading test device, wherein the carrying disc is arranged in a test chamber; the foreleg uploading test device comprises an upper connecting rod, an upper spring connection shaft, a linear elastic spring, a lower spring connection shaft, a T-shaped upper pressure head slide carriage, upper pressure heads, lower support heads, a C-shaped lower slide carriage and a lower connecting rod; the C-shaped lower slide carriage is mounted on the lower connecting rod connected with a main engine load sensor, and the upper end of the C-shaped lower slide carriage is provided with at least two guide pillars; a linear bearing capable of enabling the T-shaped upper pressure head slide carriage to move up and down along the guide pillars is mounted on the T-shaped upper pressure head slide carriage, the top of the T-shaped upper pressure head slide carriage is provided with the lower spring connection shaft connected with the lower end of the linear elastic spring, the upper end of the linear elastic spring is mounted on the lower end of the upper spring connection shaft, and the upper spring connection shaft is mounted at the lower end of the upper connecting rod; and one or more upper pressure heads are arranged under the T-shaped upper pressure head slide carriage, two lower support heads are arranged on the C-shaped lower slide carriage corresponding to the lower part of the upper pressure heads, and the carrying disc is mounted under the lower support heads. The fixture provided by the invention can take a living rat as a carrier, and is simple in structure, convenient to use, precise in acting points, accurate in location and more excellent in microdamage research, thereby being suitable for performing the three-point or four-point bending fatigue test on the living rat ulna.