Jacking device for restoring collapse fracture block

Abstract

The invention provides a jacking device for restoring a collapse fracture block and belongs to the technical field of orthopedic medical devices. The jacking device is used for jacking and restoring the collapse fracture block in a tibial plateau joint. According to the technical scheme, a sleeve is made of a metal sheet, jacking blocks are a plurality of identical pentahedrons, the top surface of each jacking block is rectangular, two side surfaces are trapezoid, the other two side surfaces of the jacking block are triangular, midpoints of two trapezoid side surfaces of the top block are connected with the top end edge of the sleeve, and a plurality of jacking blocks are connected around the top end of the sleeve sequentially; a jacking rod is located in a cavity of the sleeve, and the outer diameter of the jacking rod is matched with the diameter of the cavity of the sleeve. The jacking device solves the problem of insufficient jacking area caused by the fact that the tebia collapse area is remarkably larger than the bone tunnel diameter, can remarkably increase the jacking area during jacking and guarantees the jacking effect; meanwhile, the angle of the front end of the jacking device can be changed according to the position and the shape of the fracture block, damage to the collapse position structure due to mutual displacement and diastasis between the fracture blocks is avoided, and shaping recovery can be better realized after surgery.

Description

technical field [0001] The invention relates to a surgical instrument used for jacking up and reducing the intra-articular collapsed fracture block of the tibial plateau in the bone tunnel during operation, and belongs to the technical field of orthopedic medical instruments. Background technique [0002] Tibial plateau fracture is a common intra-articular fracture in clinical practice, and it is mostly seen in middle-aged and young people who have suffered high-energy injuries. Due to the complex and changeable fracture morphology, clinical treatment is more difficult. The purpose of treatment for tibial plateau fractures is to restore the smoothness of the articular surface and the alignment of the lower limbs, firmly fix the fracture fragments, and avoid long-term complications such as postoperative traumatic arthritis and joint stiffness. The key step in the surgical treatment of tibial plateau fractures is the reduction of displaced fracture fragments. In order to obt...

AI Technical Summary

Problems solved by technology

[0003] The biggest problem existing in minimally invasive surgical methods at present is that minimally invasive reduction of intra-articular fractures can only be performed by drilling away from the fracture site, and the tunnel formed by the drilling can reach below the fracture block for jacking and reduction. The front end of the device is consistent with the size of the outer hole of the bone tunnel, and the fracture collapse area is often significantly larger than the cross-sectional area of ​​the outer hole of the bone tunnel, so problems such as insufficient jacking area often occur, resulting in insufficient jacking and affecting the jacking effect

In addition, the front end of the lifter often cannot change the angle according to the position and shape of the fracture fragments, which may cause the fracture fragments to shift and separate from each other, resulting in structural damage to the collapsed part, which is very unfavorable for postoperative recovery.

Therefore, the jacking device currently used cannot meet the requirements of minimally invasive surgery, and it is necessary to improve it.

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