35 results about "Elbow prosthesis" patented technology

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 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 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 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 ancillary tool for fitting a humeral component of a total or partial elbow prosthesis, comprising a guiding tool (30) for boring a humeral trochlea (T) along a geometric axis (X-X′) of bend of a joint to be equipped with said prosthesis. The guiding tool (30) includes a stirrup element (31) and means (32b, 33b) for securing said stirrup element on the humeral trochlea (T) so that said guiding tool defines a guiding zone that is aligned in the geometric axis of bend for the introduction (F₁) of a drill (40), a punch or the like, in the humeral trochlea (T) along said geometric axis of bend. This ancillary tool also comprises at least one stepped template (70₁, 70₂, 70₃) for determining an anterior offset of said geometric axis of bend (X-X′) with respect to a humeral diaphyseal axis (Y-Y′).

A modular elbow prosthesis is disclosed, as well as a surgical approach and implantation technique, for using the prosthesis. The system is the first and only to allow for a, Biomechanically Anatomical, Nonconstrained, Compartmental (BANC) Elbow Arthroplasty. The modularity of the system allows it to be implanted as an unicompartmental or partial elbow replacement or a total elbow replacement. The modular elbow prosthesis for partial elbow replacement includes a cylindrical medial humeral component, a polyethylene ring thereon, and a semicircular medial ulnar component which mates with the polyethylene ring. Additionally, for total elbow replacement, the modular elbow prosthesis also includes a circular lateral humeral component, a polyethylene ring thereon, a semicircular lateral ulnar component, and a radial component. Implantation of the prosthesis is through a minimally invasive medial surgical approach with the aid of precision biomechanical guides. The application is well suited for canines, other quadrupeds, and people.

The elbow prosthesis includes an ulnar component that has a bearing end and a stem. The stem is attached to the bearing end and extends in a distal direction from it. The elbow prosthesis also has a humeral component that includes a holder end and a stem with the stem extending in a proximal direction from the holder end. The prosthesis further includes at least one bearing member that is connected to the holder end with the bearing end being attached within the holder end to allow for rotation and articulation against the at least one bearing member. The bearing end and holder end are attached to each other by a coupling mechanism that includes an opening positioned on the posterior aspect of the holder end and a mating surface on the bearing body. A method of using the elbow prosthesis and a total elbow prosthesis kit are also disclosed.

The invention relates to an artificial elbow joint prosthesis, in particular to a design method of the artificial elbow joint prosthesis which is provided with a tantalum microporous coating on the surface, the artificial elbow joint prosthesis comprises a humeral component used for being implanted into a marrow cavity of distal humerus, an ulnar component for being implanted into the marrow cavity of proximal ulna and a radial component for being implanted into the marrow cavity of proximal radius, each component consists of a joint part and a handle body part, the joint parts have the rotary motion function with different degrees for ensuring the motion of a joint after implanting the prosthesis, and the handle body parts are the parts for being inserted into the marrow cavity, thereby achieving a role of fixing the prosthesis. The joint parts of the humeral component and the ulnar component are connected by relying on a crankshaft which can rotate for chimerism, and a joint ball head of the radial component is connected by chimeric sleeve joint through a joint mortar groove connected at the proximal end of the ulnar component. The artificial elbow joint prosthesis is characterized in that a tantalum surface is wrapped on the outer surface of each handle body, and each tantalum surface is in the microporous structure, thereby improving the fixing effect of the artificial prosthesis in a human body and prolonging the service life of the artificial prosthesis.

An ancillary tool (10) comprising a trial humeral trochlea (20₂) that is representative of an anatomical humeral trochlea when the trial humeral trochlea is in place with respect to corresponding cubital (S_C) and/or radial (S_R) articular surfaces and a cut-out guide (30) for cutting an ulna (C) and/or a radius (R), wherein the cut-out guide (30) is adapted to be positioned with respect to the trial humeral trochlea (20₂). The cut-out guide (30) is also adapted to be positioned with respect to an ulna (C) and/or to a radius (R) equipped with the trial humeral trochlea (20₂).

The elbow prosthesis includes an ulnar component that has a bearing end and a stem. The stem attached to the bearing end and extends in a distal direction from it. The elbow prosthesis also has a humeral component that includes a holder end and a stem with the stem extending in a proximal direction from the holder end. The prosthesis further includes at least one bearing member that is connected to the holder end with the bearing end being attached within the holder end to allow for rotation and articulation against the at least one bearing member. The bearing end and holder are attached to each other by a coupling mechanism that includes an opening positioned on the posterior aspect of the holder end and a mating surface on the bearing body. A method of using the elbow prosthesis and a total elbow prosthesis kit are also disclosed.

An elbow prosthesis is provided and may include a first stem component attached to one of a humerus and an ulna, a second stem component attached to the other of the humerus and the ulna, and a joint disposed between and coupling the first stem component and the second stem component to permit relative movement between the first stem component and the second stem component about a first axis. The elbow prosthesis may additionally include a condyle extending from the joint and including an axis of rotation that is eccentric from the first axis.

The invention provides an elbow joint prosthesis. A connecting component, a humerus component, an ulna component and a radius component are arranged in the elbow joint prosthesis, wherein the humeruscomponent comprises a humerus handle and a humerus head arranged at one end of the humerus handle, the humerus head is connected with the connecting component in a position-adjustable mode, and the humerus head can swing relative to the connecting component along a first axis to conduct position adjustment; the ulna component comprises an ulna handle and an ulna head arranged at one end of the ulna handle, the ulna head is arranged on the connecting component in a swinging mode, the ulna head can swing relative to the connecting component along a second axis, and the second axis is perpendicular to the first axis; and the radius component is arranged on the connecting component and can move within a preset range relative to the connecting component. By adopting the technical scheme, the angle of the humerus component and the angle of the ulna component can be adjusted in two different directions so as to meet the use requirements of different patients. The arrangement of the radius component facilitates movement of a patient and can avoid damage caused by an overlarge movement range.

The invention relates to the technical field of medical prosthesis, and discloses an elbow joint prosthesis. The elbow joint prosthesis includes: a tibial prosthesis including a tibial shank and a tibial neck connected to the tibial shank, wherein a first lug and a second lug extending along a length direction away from the tibial shank are respectively formed on opposite sides of the end of the tibial neck, and the first lug is provided with a first through hole and a second lug is provided with a second through hole; a ulnar prosthesis, wherein the ulnar prosthesis comprises a ulnar shank, aulnar neck and an ulnar head connected in sequence, and a third through hole extending transversely through the ulnar head is arranged on the ulnar head; and a shaft assembly, wherein the shaft assembly includes a connecting shaft for sequentially passing through the first through hole, the third through hole and the second through hole, and a ulnar sleeve sleeved on the connecting shaft and positioned at an area between the first lug and the second lug. Wherein, the outer surface of the ulnar sleeve forms the spherical fit with the inner surface of the third through hole. The elbow joint prosthesis of the present invention is capable of improving the stability after connection.

A harness for an upper extremity below-elbow prosthesis. The harness includes a humeral cuff having medial and lateral pivot arms configured to removably attach to the socket of a below-elbow prosthesis. The humeral cuff enables a user to suspend the prosthesis without the need of a shoulder strap/harness or body harness. A cable system is affixed to the pivot arms and includes a wheel coupling the pivot arms to the control arm of a hook of the below-elbow prosthesis, thereby enabling users to operate the hook by simple flexion and extension of their arm.

The invention discloses a dynamic elbow joint prosthesis, and a dynamic upper limb prosthesis containing the dynamic elbow joint prosthesis. The dynamic elbow joint prosthesis comprises a main body structure, an upper arm (3) and a front arm (5), wherein the main body structure is a U-shaped component (9); the upper arm (3) and the front arm (5) are respectively and movably connected with a bottom plate or a side plate of the U-shaped component (9) to form a rotating pair; a hard boss (15) is arranged inside the side plate of the U-shaped component (9) for limiting; and a flexible baffling block (22) is adhered outside the hard boss (15) for buffering the vibration. An angular displacement sensor is arranged through sensor supports (33 and 34), thus achieving the real-time measurement on the angular displacement of joints. The dynamic upper limb prosthesis disclosed by the invention can achieve the movement with six degrees of freedom; and the joint damping can be adjusted; the posture of the limb can be maintained; and the movement angle can be measured in real time.

The invention provides an elbow joint prosthesis which comprises a humerus prosthesis and a ulna prosthesis. The humerus prosthesis and the ulna prosthesis are hinged to each other; strip-shaped ridges are arranged on the side wall of the humerus prosthesis and the side wall of the ulna prosthesis so that the humerus prosthesis can be connected with the inner wall of a humerus marrow cavity through the strip-shaped ridge on the humerus prosthesis and fixed when the humerus prosthesis is implanted into the humerus marrow cavity and the ulna prosthesis can be connected with the inner wall of a ulna marrow cavity through the strip-shaped ridge on the ulna prosthesis and fixed when the ulna prosthesis is implanted into the ulna marrow cavity. Therefore, the stability of initial fixing of the prosthesis can be greatly improved in an elbow joint plasty, the fixing effect in a long term is guaranteed, and the service life of the prosthesis is prolonged. The problem that the initial mechanicalfixing stability of an elbow joint prosthesis in the prior art is poor is solved.