14 results about "Articular head" patented technology

The invention discloses an artificial temporomandibular joint replacement bone trimming device, and relates to the technical field of joint prostheses, the artificial temporomandibular joint replacement bone trimming device comprises a positioning plate similar to a temporomandibular joint in shape, a prosthesis used as an artificial temporomandibular joint replacement bone is arranged in the positioning plate, and an osteotomy guide plate assembly used for osteotomy and positioning of the prosthesis is arranged in the positioning plate; a prosthesis grinding assembly is further arranged on the positioning plate; the right-angle threaded rod structures are driven to be close to or far away from each other by rotating the adjusting rotary drum, so that osteotomy grooves among the articular fossa guide plate, the articular head guide plate and the connecting plate are adjusted, positioning screws penetrate through the guide plates and positioning holes in the prosthesis for positioning, and sick part excision and prosthesis implantation operation are performed. The rack is driven by the driving gear to rotate along the positioning plate, the edge of the prosthesis is ground through the bone file, and ground powder is sucked and recycled; the device has the advantages of being high in operation efficiency, good in safety, convenient to use and simple in structure.

The joint head active turning locking knob mechanism comprises a main shell, a knob assembly is installed on the main shell, the end portion of the main shell is connected with an end effector in a rotating mode, a transmission rod is installed in the main shell, one end of the transmission rod is driven by the knob assembly to rotate, and the other end of the transmission rod is provided with a push rod in a matched mode through a screw pair. A convex column extends perpendicular to the length direction of the push rod; the steering block is installed at the end of the end effector, a sliding groove is formed in the steering block, and the protruding column is assembled in the sliding groove; therefore, rotation of the transmission rod can be converted into linear movement of the push rod, relative movement of the protruding column in the sliding groove is combined, the end effector is driven to swing relative to the main shell, swing of the joint head is achieved, self-locking performance of threads can be effectively utilized, locking reliability and stability after swing are effectively guaranteed through the screw pair, and practicability is good.

The present application provides a bridge movable joint device and a construction method, which relate to the field of bridge engineering. The bridge movable joint device includes a first structural member, a second structural member, a joint head, a joint socket and a first elastic member. The second structural member is arranged on the top of the first structural member. The joint head is connected to the first structural member. The joint socket cover is arranged at one end of the joint head, and the joint socket is connected to the second structural member. A joint cavity is formed between the joint head and the joint socket. The first elastic member is arranged in the joint cavity, and the first elastic member is configured to allow the joint head and the joint socket to move relative to each other. The bridge movable joint device is connected to the first structural member through the joint head, and is connected to the second structural member through the joint socket. A first elastic member is arranged between the joint head and the joint socket, which can allow the first structural member to move relative to the second structural member, thereby releasing the bending moment and torque of the first structural member and the second structural member, improving the structural stress, and extending the life of the bridge.

A muscle function preservation type total temporomandibular joint prosthesis includes an articular fossa member (1) and an articular head member (2) abutting against the articular fossa member (1). The articular head member (2) includes a mandibular trailing edge fixing plate (21), a sigmoid notch fixing plate (22) and an articular head portion (23). The mandibular trailing edge fixing plate (21) is connected to a bottom end of the articular head portion (23) and extends downwards, and has a plate-shaped structure and includes a mandibular-trailing-edge-surface attaching surface. The sigmoid notch fixing plate (22) protrudes from one side of the mandibular trailing edge fixing plate (21) and extends in a direction away from the mandibular trailing edge fixing plate (21), and has a plate-shaped structure and includes a mandibular-ramus-proximal-sigmoid-notch-portion attaching surface.

The utility model discloses a humerus handle beneficial to large and small tubercle reconstruction, which comprises a humerus prosthesis handle, a cover plate and a fixing screw, a screw hole is arranged on the humerus prosthesis handle, a joint surface is fixed on the humerus prosthesis handle, the joint surface is matched with a cambered surface joint head, and the cover plate is fixed on the cover plate. The humerus prosthesis handle is mutually fixed with a human body bone block through the cover plate and the fixing screw. According to the humerus handle beneficial to large and small tubercle reconstruction, the overall operation is simple, a doctor does not need to conceal a suture binding mode and a mechanical structure when a patient moves later, compared with a traditional suture binding mode, the risk that bone fragments are separated from the binding position is high, the design has no risk, fixation is firm, the humerus prosthesis handle is made of a titanium alloy material, and the use is convenient. The screw and the cover plate are also made of titanium alloy materials, biocompatibility is guaranteed, meanwhile, strength is achieved, the cover plate and the screw are in spherical connection, the device can better adapt to the shape of a bone block, and the adaptability of the device is improved.

The invention relates to a temporomandibular joint prosthesis (90, 902) comprising a first element (30, 302) that can be fastened to a first side of the lower jaw (40) and a second element (80, 802) that can be fastened to the first side of the cranium (50), wherein a joint head (42, 422) is formed at one end of the first element (30, 302), wherein a joint surface (82) is formed on the second element (80, 802), said joint surface forming an abutment of the joint head (42, 302), wherein the joint head (42, 422) and the joint surface (82, 822) predefine a rotational axis (A1, A2), wherein the first element (30, 302) and the second element (80, 802) are shaped such that, in the implanted state, the rotational axis (A1, A2) is pre-oriented at an angle to a frontal plane (F) of the patient. The invention also relates to a kit (K) consisting of two such temporomandibular joint prostheses (90, 902).

The present invention relates to the technical field of toys. Provided are an articulated building block structure and a toy. The articulated building block structure can switch between fully extended and bent states, and comprises a first articular head, a building block member and a second articular head, wherein one end of the first articular head and one end of the second articular head can be assembled together to form a joint; and the building block member is arranged outside the joint such that the joint cannot be disassembled. By means of designing the first articular head, a limiting plate and the second articular head into a structure that cannot be disassembled, the present invention achieves the joint function; in addition, the limiting function can be achieved, increasing the stability of the joint, and part of the joint can also be concealed, thus improving the aesthetic appeal of a toy, such that the toy exhibits high visual realism and good playability.

The present application belongs to the technical field of spinal surgery implants, and discloses a new lumbar facet joint prosthesis, which comprises a first fixed base and a second fixed base, a central auxiliary support module connecting the first fixed base and the second fixed base, two groups of joint modules, a joint socket and a joint head, the joint head is ellipsoidal, the joint head is arranged in the inner cavity of the joint socket, the joint head and the inner cavity of the joint socket are in clearance fit, a first opening and a second opening are arranged on the joint socket, and the height of the side wall of the joint socket near the central auxiliary support module on one side is higher than that on the opposite side. The two groups of joint modules symmetrically arranged are used for supporting and limiting the two sides of the vertebral body respectively, instead of the arrangement of a single central elastic connecting piece, so that more stable support is provided, and the stability of the prosthesis is improved; through the clearance fit of the ellipsoidal joint head and the joint socket, the two groups of joint modules are dynamically active, the multidimensional movement of the natural facet joint is simulated, and the movement mode of the lumbar vertebrae is more fitted.

Hip joint implant for fastening to a pelvic bone, with a support body which has a socket and whose convex outer face is designed to bear on the pelvic bone and which, on its concave inner face, has a receiving seat for a pelvis-side bearing that is designed to receive a joint head of a femoral component of a hip prosthesis, and with outwardly directed flat fastening brackets which are arranged at the edge region of the socket and are each provided with at least one receiving seat for a fastening means. The fastening brackets are made of a reshapeable biocompatible material and are connected to the socket via a non-releasable cohesive bond, wherein the socket is made of another, stiffer biocompatible material. A high degree of robustness of the socket is thus combined with what is, by virtue of the reshapeability, an improved adaptation to the anatomical conditions of the respective pelvic bone. This improves reliability of fastening, stability and long-term behavior.

The utility model discloses an active swing knob of joint head and surgical instrument, including main casing, install the knob subassembly on the main casing, main casing end portion is movably connected with the end effector, the knob subassembly structure includes: install the knob on the main casing, be equipped with the turntable below the knob, the turntable is driven by the knob to rotate synchronously, be equipped with the knob on the main casing end portion, be equipped with the end effector on the main casing end portion, and be equipped with the knob on the main casing end portion. A friction assembly is pressed between the knob and the turntable; a pull rod is installed in the main shell, the bottom end of the rotary disc is assembled with the pull rod, and the rotary disc rotates to drive the pull rod to move and promote the end effector to swing relative to the main shell. In actual use, when the rotary knob drives the rotary table to rotate to perform deflection adjustment of the end effector, the friction assembly which is pressed between the rotary knob and the rotary table forms stepless rotation with damping, so that the rotation has certain damping hand feeling and can be stopped when rotating to any position, damping self-locking is achieved, the locking effect is effectively enhanced, and the service life of the end effector is prolonged. And it is assisted that the end effector is reliably located at the preset angle, operation is convenient, and the user experience is improved.

Photodynamic devices for replacement of an articular head of a bone are provided. In an embodiment, a photodynamic device includes a photodynamic support member and an articular member attachable, either fixedly or removably, to the photodynamic support member and having a bearing surface. In an embodiment, the articular member includes a recess designed to receive the photodynamic support member. In an embodiment, the photodynamic support member includes an opening into which a shaft of the articular member can be inserted to attach the articular member to the photodynamic support member.

The invention discloses a full wrist joint prosthesis with a distal radioulnar joint, and relates to the field of joint prostheses. According to the full wrist joint prosthesis with the distal radioulnar joint, due to the design that the joint head component in the joint component can rotate and can be contained in the joint nest component in the axial moving mode, accurate simulation of physiological movement of the distal radioulnar joint is achieved; the articular head component is allowed to rotate around multiple axes in the articular fossa component so as to be matched with anterior and posterior rotation actions of the forearm, and is allowed to slightly slide in the axial direction so as to simulate physiological translation of the ulna relative to the radius, so that the internal constraining force between prosthesis components in the forearm rotation process is reduced, and the anterior and posterior rotation of the anterior and posterior rotation of the anterior and posterior rotation of the anterior and posterior rotation of the anterior and posterior rotation of the anterior and posterior rotation is facilitated. A postoperative patient can obtain a rotation function closer to nature, and abnormal stress transmitted to a bone prosthesis interface due to movement mismatching is effectively reduced.

The present application provides a joint head prosthesis assembly, and the joint head prosthesis assembly includes: a body, the body includes a first end and a second end extending along an axis, an outer surface of the first end is a spherical surface, and a recessed portion is provided at the second end; wherein, the joint head prosthesis assembly further includes: a bushing, at least a part of the bushing is configured to be received in the recessed portion, so that the body and the bushing can adjust their axial relative positions with respect to each other; and a fixing member, the fixing member is configured to fix or release the body and the bushing. The present application also relates to an artificial joint including the above joint head prosthesis assembly. By adjusting the self-length of the joint head prosthesis assembly or automatically adapting to the physiological neck length, the present application can ensure that the neck length of the newly formed joint combination is consistent with the physiological neck length, thereby eliminating risks such as joint prosthesis dislocation and patient pain caused by the inconsistency, and further improving the surgical quality.

The present invention relates to the technical field of artificial prostheses, and particularly to a surface replacement prosthesis for the elbow joint. The surface replacement prosthesis for the elbow joint includes: a prosthetic elbow joint head, on which an installation groove is formed, and the installation groove is installed at the distal end of the humerus; a connecting portion, one end of which is connected to the prosthetic elbow joint head, and the other end extends along the proximal end of the humerus; and a bone grafting groove, which is arranged in the installation groove and is used for accommodating implanted bone fragments. The surface replacement prosthesis for the elbow joint provided by the present invention does not limit the degree of freedom of the patient's elbow joint and solves the problem of limited movement of the traditional elbow joint; moreover, when using this surface replacement prosthesis for the elbow joint, the amount of osteotomy of the patient's elbow joint is small, which is beneficial to the recovery and later revision of the patient's elbow joint; in addition, a bone grafting groove is also provided for implanting bones into the bone grafting groove to supplement the patient's bone mass, which is beneficial to reducing the weight of the elbow joint part, improving the patient's comfort, and after long-term recovery, the bones in the bone grafting groove can grow together with the humerus, thereby restoring the normal shape and function of the humerus.