Multidirectional locking intramedullary interlocking nail

Abstract

The invention discloses a multidirectional locking intramedullary interlocking nail, and belongs to medical apparatuses and instruments. The far end of a main nail is provided with a front-back direction lock pin straight-passing lock nail hole A, an internal-external direction lock pin internal and external transverse pass lock nail hole B, and two internal-external direction internal and external transverse pass or 45-degree internal and external inclined pass lock nail holes C, the near end of the main nail is provided with a front-back direction lock nail front-back straight pass lock nail hole A, two 90-degree intersection, two 90-degree intersection lock nail front-internal, front-external to back-external and back-internal transverse pass lock nail holes D, two internal-external direction internal-external transverse pass or 45-degree internal-external inclined pass lock nail holes C and an internal-external direction internal-external transverse pass lock nail hole B. The multidirectional locking intramedullary interlocking nail has the advantages that the stability of the angle between the main nail and the lock nail is stronger; the near end and the far end have multidirectional locking; the high-thread cancellous bone lock pin has the surrounding, extrusion and fixing effect on a fracture of distal radius.

Description

technical field [0001] The invention belongs to a medical device, in particular to a locking multi-directional locking intramedullary nail. Background technique [0002] Fractures of the proximal and distal ends of the tibia, especially those involving intra-articular plateau fractures and pilon fractures are common intra-articular fractures. Surgery is the main method for the treatment of tibial plateau and pilon fractures. Open reduction, plate and screw internal fixation is often used. The locking steel screw is an eccentric extramedullary support, and it is difficult to achieve symmetrical fixation between the plate and the contralateral fracture. Therefore, double-plate or triple-plate encircling support is often used clinically for fixation. However, this fixation method will cause serious damage to local soft tissues. The advent of the locking plate is an advancement in the treatment of tibial plateau fractures, which provides a relatively symmetrical support and fix...

AI Technical Summary

Problems solved by technology

[0003] The current interlocking intramedullary nails are only suitable for fractures of the tibial shaft, and are contraindicated for fractures of the distal and proximal ends of the tibia. “angular stability” function, that is, there is no locking function between each other; ②the proximal and distal locking nail holes of tibial interlocking intramedullary nails are few, and there is no scientific multi-directional locking function; ③the locking nail itself does not have the function of cancellous bone screw, There is no encircling effect on plateau fractures; ④ Involving intra-articular fractures, on the basis of restrictive locking and fixation, non-restrictive cancellous bone lag screws are still needed to assist fixation, that is, "raft nail" fixation, so that intra-articular fractures can be transformed into Extra-articular fracture

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