Posterior malleolus dissection and locking steel plate applicable to minimally invasive surgery

Abstract

The invention discloses a posterior malleolus dissection and locking steel plate applicable to minimally invasive surgery, and belongs to the technical field of medical apparatuses for the orthopedics department. The posterior malleolus dissection and locking steel plate is used for fixing the facture posterior malleolus. According to the technical scheme, the lower end of a plate surface of the steel plate is curved to one side, the curving radian is matched with the a radian at the rear portion of the lower end of the tibia, 3-6 locking holes are formed in the plate surface of the steel plate, threads of the locking holes are matched with threads of forcing screws, locking holes are formed in the two sides of the upper end and the lower end of the plate surface of the steel plate respectively, the hole diameter of the locating holes is matched with the diameter of a Kirschner wire, the threads at one end of a sleeve are matched with the threads of the locking holes, and the other end of the sleeve is oppositely connected with one end of a drilling locater which is used in cooperation with the sleeve. The posterior malleolus dissection and locking steel plate is a pioneer in posterior malleolus fracture surgery, the traditional theory and method of a posterior malleolus fracture operation that the operation should be started from the rear outer side of the tibia or the rear inner side are changed, the problem that surgery operations and surgery effects are influenced by the dissection position of the tendo calcaneus in the posterior malleolus fracture surgery is solved fundamentally, and a new path is opened up for achieving minitrauma of the posterior malleolus fracture surgery.

Description

technical field [0001] The invention relates to an anatomical locking steel plate for fixing posterior malleolus fractures, belonging to the technical field of orthopedic medical devices. Background technique [0002] Posterior malleolus fracture is a common disease of ankle joint injury. The treatment of posterior malleolar fracture usually adopts plaster fixation, lag screw fixation and plate fixation according to the size of the fracture fragment. Generally, plaster fixation is used when the fracture fragment is less than 1 / 4 of the articular surface of the distal tibia; when the fracture fragment reaches or exceeds 1 / 4 of the articular surface of the distal tibia, lag screws or plates are generally used for fixation. The injury of lag screw fixation is small, and the compression of the fracture end is realized. However, because the alignment of the fracture block is poor when using the anterior approach, and the posterior malleolus is located at the distal end of the tib...

AI Technical Summary

Problems solved by technology

At the same time, the posterolateral or posteromedial approach, when the plate is fixed and taken out again, due to the obstruction of the Achilles tendon, it is more difficult to unscrew the screw when taking out the internal fixation, which is likely to cause the phenomenon of slipping, which will cause greater trauma to the patient

[0003] Chinese patent application number 201520720566.1 discloses a posterior ankle fixation system. This device fixes the posterior ankle with compression locking screws from the posterolateral approach, taking into account the dual effects of compression and support on the fracture fragment, but due to Due to the limitations of the posterolateral approach to the posterior malleolus, it is still difficult to achieve parallelism between the longitudinal axis of the plate and the anatomical axis of the tibia, and it is difficult to achieve a firm lock between the compression locking screw and the locking hole, and it is also difficult to avoid taking out the posterolateral approach. Disadvantages of easy slip buckle when internal fixation

[0004] So far, the plate fixation technology for the treatment of posterior malleolus fractures has been adopted from the posterolateral or posteromedial approach, but due to the characteristics of the anatomical position of the Achilles tendon, the posterolateral or posteromedial approach not only has a very narrow operating space, but also is difficult to achieve. The locking effect of the pressure locking screw and the steel plate is firm, and it is difficult to remove the steel plate, which has not been overcome until now

With the development of orthopedic minimally invasive surgery, the disadvantages of the current plate fixation method for posterior malleolus fractures have become more and more apparent, making minimally invasive surgery unable to be used in posterior malleolus fracture surgery, and the advantages of minimally invasive surgery cannot be brought into play. The problems to be solved urgently need doctors and scientific researchers to take effective measures to solve them, so as to promote the smooth development of minimally invasive surgery in orthopedic clinics and provide patients with safer and more effective treatment.

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