8 results about "Articular head" patented technology

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.

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 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.

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.