Distal radius fracture fastener with angle correcting structure

Abstract

The invention discloses a distal radius fracture fastener with an angle correcting structure, relates to a device for treating bones or joints, and in particular relates to a distal radius fracture fastener with an auxiliary correction function when an internal fixer is implanted. The distal radius fracture fastener comprises a bone plate and a plurality of locking screws. The distal radius fracture fastener is provided with the angle correcting structure and takes the bone plate as a lever. A fulcrum nail arranged at the far end of a rod part of the bone plate serves as a fulcrum, a support pad component is arranged at the proximal end of the rod part of the bone plate for adjusting an angle of the bone plate, so that the head part of the bone plate is bonded with a fragment fracture, and the locking screws arranged at the head part of the bone plate are far away from an articular cartilage surface of a distal radius. The support pad height of the support pad component is adjusted in a process of implanting the bone plate to effectively prevent the locking screws at the far end from from breaking through the articular cartilage surface so as to enter an articular cavity, so that the risk of fixation failure is reduced, and a palm tilt is accurately recovered through the angle correcting structure to shorten an operation time and provide the angle stability for fracture.

Description

technical field [0001] The invention relates to a device for treating bones or joints, in particular to a distal radius fracture fixer with an angle correction structure used for auxiliary correction when implanting an internal fixator. Background technique [0002] Distal radius fracture is one of the most common fractures, accounting for about 1 / 6 of all fractures in the whole body. Distal radius fractures involve comminution of the metaphysis and articular surface, resulting in poor local stability. Conservative treatment often leaves complications such as uneven articular surface, radial shortening, wrist joint deformity, traumatic arthritis, and intractable wrist pain. At present, the following internal fixation methods are commonly used clinically, but all of them have shortcomings: 1. Dorsal plate, which has complications such as tendon wear, rupture, and Lister’s node resection; 2. Palmar plate, which cannot provide stress for dorsal instability The side pillars are...

AI Technical Summary

Problems solved by technology

At present, the following internal fixation methods are often used clinically, but all of them have shortcomings: 1. Dorsal plate, which has complications such as tendon wear, rupture, and resection of Lister’s nodules; 2. Palmar plate, which cannot provide stress for dorsal instability Lateral pillars are prone to fixation failure; 3. Double plate internal fixation on the palm and dorsal side can achieve strong and reliable fixation, but the surgical trauma is large, and there is a possibility of tendon damage during the operation

[0005] However, with the use of the volar locking plate, it is necessary to effectively restore the volar inclination during the operation, and to fix the distal locking screw under the articular cartilage to achieve effective fixation. However, in actual operation, it is not easy to insert the locking screw

If the existing volar locking plate is placed on the radius, and then locking screws are driven in, the locking screws can easily break through the articular cartilage surface and enter the joint cavity, resulting in surgical errors, and repeated operations will cause loosening of the fixation, see image 3

In order to avoid this risk, the existing technology usually drives the screw at the proximal end, which greatly reduces the holding force of the locking screw

Therefore, the existing volar locking plate has the following technical problems: ①The distal locking screw easily breaks through the articular cartilage surface and enters the joint cavity during bone plate implantation

②It is difficult to grasp the palm inclination angle during bone plate implantation

Images