41 results about "Humerus Head" patented technology

A fixation device is disclosed for the fixation of proximal humerus fractures includes an implantable humerus plate having a proximal portion adapted to be positioned at a head and medial calcar of the humerus, a distal portion adapted to be positioned along a shaft of the humerus, and a plurality of calcar openings provided through the proximal portion adapted to receive calcar fasteners that extend into the medial calcar. The calcar fasteners are grouped into a rafted configuration and the tips of each fastener are positioned into the calcar region so that torsional forces bearing upon the calcar regions are distributed into the rafted fastener support, thereby avoiding varus collapse of the humerus head after fixation of the fracture.

A device for use in the treatment of proximal humerus fractures, comprising a substantially spoon-shaped body having a blade-like proximal portion intended to complement the humerus head and provided with at least one seat in which to insert a wire, a threaded nail, or a similar element to stabilize the fracture, a plate-like and elongate distal portion, intended to complement the humerus neck and provided with at least one seat in which to insert a screw or a similar element to fix the body to the humerus, and a central bulge, or block, interposed between the proximal portion and the distal portion and wherein a seat is obtained in which to insert a screw intended to stabilize the humerus head.

The invention provides a combined shoulder joint implant which comprises a humerus handle and a humerus head, wherein the humerus handle comprises a humerus handle far end part and a humerus handle near end part which are detachably connected, and the humerus head is connected with the humerus handle near end part. By adopting the combined shoulder joint implant, the humerus handle far end part and the humerus handle near end part are connected through a slot, many humerus handle far ends and many humerus handle near ends with different specifications can be assembled in operations, so that many change combinations of the neck shaft angle, the back inclination and the offset distance of the combined shoulder joint implant can be achieved. The effect after the combined shoulder joint implant is implanted into human bodies is similar to the human anatomical morphology and postoperative rehabilitation is benefited.

The artificial carbon humeral prosthesis consists of carbon humeral ball and carbon humeral handle, the humeral ball has fixing slot in its bottom and the humeral handle comprises fixing column and humeral handle rod. The fixing column is embedded into the fixing slot, and the axis of the humeral ball joint surface and the axis of the humeral handle rod form one angle of 135-145 deg. The humeral carbon ball of the present invention has high mechanical strength and high chemical stability, no cell toxicity, no irritability, no genetic toxicity, good biocompatibility, elastic modulus near that of bone, osteoplastic activity and lubricating property. The humeral handle has high mechanical strength, high corrosion resistance and good biocompatibility. The present invention is suitable for use in case of replacing humerus.

The invention relates to the field of medical instruments, in particular to an assembled shoulder joint prosthesis component which comprises a humerus stem prosthesis and further comprises a humerus adapting disc, a humerus adopting disc pad, a shoulder glenoid bulb, a shoulder glenoid fixing disc and a bone cage sequentially arranged at the near end of the humerus stem prosthesis. The assembled shoulder joint prosthesis component can relieve pain caused by lesions on two sides of humerus head and glenoid cavity and can relieve osteoarthritis, rheumatoid arthritis, traumatic arthritis, shoulder joint maldevelopment and tumor, and wider joint movement range can be acquired without causing prosthesis collision. The far end of a humerus stem is designed to be glazed while the near end of thesame is in assembling connection, so that effective fixing of humerus tubercule bone blocks is realized, and movement of the bone blocks is reduced.

The invention relates to a humerus near end bone fracture plate. A plurality of screw holes are formed in the humerus near end bone fracture plate; screws capable of penetrating through the plurality of screw holes can be arranged into different regions of a humerus head through the plurality of screw holes; the average value of rear inclined angles of the middle axes of the plurality of screw holes is more than 0 degree. The middle axes of the plurality of screw holes in the humerus near end bone fracture plate are wholly and backwards inclined so that the screws penetrating through the plurality of screw holes can be uniformly distributed in the whole region of the humerus head; more screws are prevented from being arranged in the front end part of the humerus head so that the influences on blood supply of the front end part of the humerus head, caused by the arranged screws, are reduced and the front end of the humerus head is prevented from thanatosis; excessive bone mass of the front end part of the humerus head also can be prevented from being lost and the front end part of the humerus head is prevented from being collapsed. Furthermore, the plurality of screws are more uniformly distributed in the humerus head and the holding force provided by the plurality of screws is greater; the stress on each region of the humerus head is more uniform and the stability of the bone fracture plate is better; the damages to the front end part of the humerus head are avoided.

A 3D reproducing method with multi-row for measuring the torsional angle of humerus head includes such steps as using the shoulder joint mode in volume reproducing technique to cut and separate scapula and obtain the reproduced 3D humerus image, drawing a circle to fit the joint surface of humerus head, drawing a line between dots A and B which are cross points between said circle and joint surface, drawing the midnormal line EF or said line AB to obtain the far-end defining line of said torsional angle, drawing a line CD between the most convex dots of internal and external upper condyles to obtain its near-end defining line, and measuring the included angle between lines EF and CD to obtain said torsional angle.

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 provides a shoulder joint prosthesis connecting assembly, a forward shoulder joint prosthesis and a reverse shoulder joint prosthesis. The shoulder joint prosthesis connecting assembly comprises a humerus handle and an installing part. The installing part is arranged at one end of the humerus handle and provided with a first connecting structure and a second connecting structure, the first connecting structure is used for being connected with a forward shoulder humerus head, and the second connecting structure is used for being connected with a reverse shoulder humerus head. By means of the technical scheme, the problem that in the prior art, a shoulder joint is poor in universality, and consequently forward shoulder and reverse shoulder replacement cannot be achieved is solved.

The present invention belongs to the field of medical devices and discloses a surface shoulder joint prosthesis. The surface shoulder joint prosthesis comprises a humerus head prosthesis matched withshape of a human humerus head, a connecting rod formed on an inner surface of the humerus head prosthesis, and a broach detachably connected with the connecting rod, wherein an external thread sectionis formed on the connecting rod, an internal thread section matched with the external thread section and a first hollow section communicating with a tail end of the internal thread section are formedin the broach, and the external thread section of the connecting rod rotates to enter the first hollow section through the internal thread section and is contained and fixed in the first hollow section. The surface shoulder joint prosthesis can be firmly fixed with humerus sclerotin of human body, and has good stability and wide applicability at the same time.

The invention provides a mouth gag for shoulder joint humerus head. The mouth gag for the shoulder joint humerus head comprises a mouth gag body connected with a holder in a matched mode, and a cutting edge used for pre-reaming of the shoulder joint is arranged at the end, away from the holder, of the mouth gag body. The mouth gag has the advantages that the defect that near-end marrow reaming cannot reach an ideal position or is difficult to drive due to the fact that far-end marrow reaming instruments and near-end marrow reaming instruments are different is overcome, and it can be effectively guaranteed that the square file reaches expected positioning.

The invention discloses a proximal humerus head-preserving and prosthesis conversion treatment device. The device includes a head bracket. The upper end of the head bracket is embedded in the femoralhead, the lower end of the head bracket is fixed in an intramedullary handle body, the head bracket is internally provided with a lag screw, and a lock pin is arranged in the intramedullary handle body and passes through the intramedullary handle body. The device can effectively and flexibly select head-preserving treatment or non-head-preserving treatment, the complexity of surgery is reduced, the cost of the surgery is reduced, and a safe environment is created for reserved secondary surgery when necrosis occurs later.

The invention provides a testing platform for performance of a shoulder joint prosthesis. The testing platform comprises a test platform, a humerus head fixing platform, an air pump, a complete machine support, a parallel rotation platform, a glenoid fossa fixing platform, a pressure sensor, a simulation bin, a PLC and a PC upper computer. The platform can effectively evaluate the basic performance of the shoulder joint prosthesis, test the rotation angles of the shoulder joint prosthesis in all directions, can also test the friction characteristics of the shoulder joint prosthesis, is powerful in function, has certain guiding significance for material selection and structural design of the shoulder joint prosthesis, and fills the blank of evaluation of the performance of the shoulder joint prosthesis.

The invention provides a joint prosthesis which comprises a humerus head prosthesis, a hollow screw and a gasket; the humerus head prosthesis is provided with a protruding part, the protruding part is provided with a through screw hole, the hollow screw is pressed on the surface of sclerotin through the gasket, and the hollow screw penetrates through a bone to be matched with the screw hole. After the reversed hollow screw is connected with the humerus head, a pull-down force is applied, so that the humerus head is tightly attached to the surface of the near end of the humerus, and later falling is prevented. The matched gasket is in threaded connection with the humerus head, the humerus head is firmly pressed on the surface of the near end of the humerus, and the falling risk of the humerus head is reduced.

The invention relates to an anatomic artificial bone assisting reduction of proximal humeral fractures. The anatomic artificial bone comprises an lower fixator and an upper fixator; one end of the lower fixator is connected onto the upper fixator; the lower fixator is cylindrical shaped, and the axis of the lower fixator is coincided with the axis of the human humeral shaft during use of the lowerfixator; a humeral bone plane and cylindrical hollows corresponding to intertubercular sulcus are arranged on the upper fixator; the cylindrical hollows corresponding to the intertubercular sulcus are arranged on the side face of the upper fixator; a central locator is arranged on the humeral bone plane. The anatomic artificial bone has the advantages that reference marks can be provided for reduction of the proximal humeral fractures, rapid anatomical reduction can be highly assisted in terms of quantification, bone loss is filled, a supporting platform is provided for fractures, surgical process is simplified, and the anatomic artificial bone can serve as a novel medical instrument and has extensive application prospects in clinical use.

The invention relates to a shoulder joint prosthesis adjustable neck used in shoulder joint replacement operations. The shoulder joint prosthesis adjustable neck consists of three parts including a neck body, an ejection nail and an expansion plug, wherein a four-blade-shaped spherical surface structure is adopted at one side of the neck body, a cone hole is formed inside the neck body, the cone hole is matched with the expansion plug, the cone neck design is adopted at the other side, a screw hole is formed in the middle, and the screw hole is matched with the ejection nail. The spherical surface diameter of the spherical surface part of the shoulder joint prosthesis adjustable neck is 8 to 12mm, the proper regulation can be carried out according to the size of the humerus handle, the cone surface side one part of the shoulder joint prosthesis adjustable neck adopts the 5-degree and 46-minute conicity design, and the conicity can realize the self locking fixation between the humerus head and the humerus handle. The ejection nail is arranged in the center of the cone part, the ejection nail can be clockwisely screwed in, the ejection nail can eject the expansion plug with the conical lower part to downwards move so that the four-blade-shaped spherical surface expands towards the circumference to realize the matched tensioning with the ball socket part of the humerus handle, and the fixation effect is realized. The prosthesis can be used for preferably regulating the angle between the humerus head and the humerus handle according to the physiological structure of different patients so that the prosthesis can be more similar to the anatomie structure of the shoulder joint of the patients. The effect after the operation is better, and the shoulder movement reaches a greater range.

The invention relates to a shoulder joint prosthesis. According to the technical scheme, the shoulder joint prosthesis comprises a humerus head and a humerus handle, wherein the humerus head comprisesan integrated structure consisting of a humerus ball head and a humerus shaft splicing column fixedly connected to the lower part of the humerus ball head; the humerus handle is an integrated structure consisting of a truncated-cone-shaped splicing disc, a conical connecting column connected to the upper end surface of the splicing disc and a humeral shaft medullary cavity inserting column connected to the lower end surface of the splicing disc, wherein a symmetrical groove is arranged on the humeral ball head, a plurality of sewing holes for sewing with peripheral shoulder joint tissues arearranged on the groove, the shoulder joint prosthesis also comprises a humerus pressing plate. According to the invention, the symmetrical groove is distributed at the upper end of the humerus ball head, the balance of the growth of shoulder soft tissues is considered, the plurality of sewing holes are arranged in the groove, the humerus ball head and surrounding tissues can be sewn together, theconnectivity is strong, and a humerus pressing plate is additionally arranged, so that the reliability and stability of the connection between the prosthesis and the shoulder joint are improved as a whole.