Hybrid locking bone fracture plate system and matching screw driver

Abstract

The invention discloses a hybrid locking bone fracture plate system. The system comprises a needle A, a chuck B and a bone fracture plate C; the needle A is of a cylindrical structure, one end of the needle A is a pointed end, and the other end thereof is a rod portion; the chuck B is provided with a through hole and a first gap in communication with the through hole, the rod portion of the needle A is arranged in the through hole in a penetrating and sleeved mode, one end of the chuck B is provided with a first prism-shaped hollow structure, and the outer surface of the chuck B is provided with a first thread; and the bone fracture plate C is provided with a locking hole matching the chuck B, a second thread is arranged in the locking hole, and the second thread is in threaded connection with the first thread. The invention further discloses a screw driver matching the hybrid locking bone fracture plate system. The screw driver is used for mounting or dismounting the hybrid locking bone fracture plate system. The chuck B locks and connects the needle A and the bone fracture plate C to form a reliable structure, the stability of fracture reduction is effectively maintained, the secondary displacement of a fracture is avoided, the damage of the needle A to a bone is far smaller than that of a screw, and the fracture reduction can be realized.

Description

technical field [0001] The invention relates to a medical fracture fixation device, in particular to an internal fixation system applied to reduction and effective fixation between fracture blocks. Background technique [0002] Bone plate system is one of the most important internal fixation schemes for surgical treatment of fractures. Through different connection methods between screws and bone plates, it meets the needs of fracture fixation in different parts: non-locking screws are used to match the non-locking holes on the bone plate. Compression fixation is formed between the fracture fragments to meet the needs of intra-articular fracture fixation; locking screws are used to match the locking holes on the bone plate to establish angular and axial stability between the bone-internal fixation system to meet the needs of bone fractures and shaft fractures. The need for fixation of epiphyseal fractures. [0003] The current bone plate system has the following disadvantage...

AI Technical Summary

Problems solved by technology

Sometimes, during the process of implanting the first screw and the second thread at both ends of the fracture, the fracture will be displaced twice, resulting in greater surgical trauma and prolonged operation time

The so-called secondary displacement of the fracture means that the temporarily fixed fractures such as reduction forceps and Kirschner wires are in a state of good reduction but poor stability. Use a depth gauge to measure the depth of the nail hole, tap a screw in the bone, and then screw in a screw of appropriate length; the corresponding external force of these operations acts on the temporary fixation of the fracture site with reduction forceps, Kirschner wires, etc. Sometimes the temporary fixation of the fracture will fail, and the secondary displacement of the fracture will occur

When the fracture is displaced for the second time, the doctor needs to remove the device such as the reduction forceps and Kirschner wires that were temporarily fixed last time, and reset again and temporarily fix the fracture with reduction forceps and Kirschner wires; the worst is: (1) the fracture occurs two times Secondary displacement sometimes leads to new fracture at the fracture site, which increases the difficulty of re-reduction, prolongs the operation time, and reduces the quality of reduction; (2) Secondary displacement of the fracture requires temporary fixation with reduction forceps and Kirschner wires again Fracture, in the process of implanting the first screw and the second thread through the bone plate at both ends of the fracture, the fracture may still be displaced again

[0005] 2. During the operation, after the bone plate screw system fixes the fracture, the doctor judges the quality of the fracture reduction and the positional relationship between the bone and the bone plate based on experience and X-rays; sometimes, the fracture reduction and internal fixation position are not very good, but the doctor does not know One of the important reasons for willing to reset the fracture or adjust the position of the bone plate is: when treating fractures, the bone position where screws can be implanted properly is very limited, and repeated drilling and implanting screws on a limited bone surface will cause greater damage to the local bone. Can affect the reliability of the final plate screw fixation of the fracture

[0006] 3. The screw plate system cannot be applied to fractures involving the epiphysis of children, because the threads will cause greater damage to the bones and affect the development of the bones; currently, the mainstream internal fixation solution for fractures involving children's bones is thin and smooth Kirschner However, the reliability of Kirschner wire fixation for fractures is not as good as that of screw and plate system. Even if external fixation with plaster or brace is assisted, there is still a certain risk of internal fixation failure; Comfort, increasing the difficulty of nursing and rehabilitation of children

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