Hook type orthopedic bolt

Abstract

The invention relates to a hook type orthopedic bolt. The hook type orthopedic bolt comprises a bolt body, wherein the bolt body comprises a ball head and a screw part, the screw part is internally provided with a hollow mounting cavity, the hollow mounting cavity is internally provided with a hook type assembly capable of preventing the bolt from moving, the hook type assembly comprises a pair ofhook whorl gaskets, a rotation pin and extending bolts, the hook whorl gaskets are arranged in the middle of the hollow mounting cavity, the hook whorl gaskets are connected through the rotation pin,the hook whorl gaskets can rotate around the rotation pin, the extending bolts are correspondingly arranged at the upper portion of the hook whorl gaskets, the top end of each extending bolt is movably connected with the ball head, and the bottom ends of the extending bolts abut the hook whorl gaskets. The hook type orthopedic bolt has the advantages that through the effective combination of thespecial hook whorl gaskets, extending bolts and screw part, the immobility is greatly improved when the hook type orthopedic bolt is fixed with a bone surface, the problems of looseness, movement, rotation, bolt quit and the like are prevented during the use of the bolt, thereby ensuring the security and reliability of the operation, and reducing the pain of a patient.

Description

Technical field: [0001] The invention relates to the technical field of medical instruments, in particular to a hooked orthopedic screw. Background technique: [0002] Screws are often used in orthopedic surgery. For example, steel plates need screws to fix them on the bone surface, intramedullary nails need screws to fix them inside the bone, and pedicle screws are also screwed into the pedicle and then fixed to stabilize the lesion. Although the structure of these screws is slightly different, the front parts are all threaded, or single thread or double thread or a combination of single and double threads or only part of the thread. After these screws are screwed into the bone, due to the patient's long-term activities and Bone quality problems (such as deformity, osteoporosis, etc.), resulting in screw loosening or even prolapse. Invention content: [0003] The purpose of the present invention is to provide a hook-type orthopedic screw with a simple structure, firm fix...

AI Technical Summary

Problems solved by technology

When addressing this problem, existing manufacturers generally make a fuss about the thread of the screw, and strengthen it by changing the size, depth, shape, quantity, etc. of the thread. However, such improvements cannot avoid external factors such as vibration and collision. Causes the problem of screw thread loosening, so this technical problem cannot be fundamentally solved

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