Pedicle screw seat cross-connecting device

Abstract

The invention relates to a pedicle screw seat cross-connecting device, which comprises a first nail base, a second nail base, a first connecting rod, a second connecting rod, a first locking plug and a second locking plug, a first connecting rod radially passes through the first nail base, and the first locking plug is screwed into the first nail base and abuts the first connecting rod, and a second connecting rod radially passes through the second nail base, the second locking plug is screwed into the second nail base and abuts the second connecting rod, the innovation is that the pedicle screw seat cross-connecting device also comprises a first horizontal connecting rod and a second horizontal connecting rod, one end of the first horizontal connecting rod is arranged at the first nail base and located between the first connecting rod and the first locking plug, and one end of the second horizontal connecting rod is disposed on the second nail base and located between the second connecting rod and the second locking plug; and the other end of the first horizontal connecting rod is connected with the other end of the second horizontal connecting rod through a connecting mechanism. The pedicle screw seat cross-connecting device not only reduces the surgical notch, but also improves the safety of the operation.

Description

technical field [0001] The invention relates to a transverse connection device, in particular to a pedicle screw seat transverse connection device suitable for use in a spinal internal fixation system, and belongs to the technical field of orthopedic surgical instruments. Background technique [0002] For patients with spinal diseases, minimally invasive surgery of the spine has the advantages of less tissue damage, faster recovery, less cost, and better psychological effects for patients compared with traditional open surgery with large trauma, high risk, and long recovery period. [0003] At present, there are two types of cross-beam devices in the prior art: the first type of cross-connection device includes a cross-connection buckle and a cross-connection rod. The horizontal connecting buckles are respectively installed, and the two ends of the horizontal connecting rods are respectively fixedly connected with the corresponding horizontal connecting buckles by locking sc...

AI Technical Summary

Problems solved by technology

[0004] First, the above two horizontal connection devices have increased surgical incisions, so that more parts are implanted in the patient's body, which not only has high surgical costs, but also causes discomfort to the patient;

[0005] Second, the first type of cross-connection device uses the force of the cross-connection directly on the connecting rod, and the independent cross-connection buckle and cross-connection rod are prone to the risk of failure such as liquidation and breakage during the locking process, making the safety lower;

[0006] Third, the second type of horizontal connection device is to apply the force of the horizontal connection directly on the locking cap that is threadedly connected with the screw seat, so that there is a risk of the opening of the screw seat expanding during the locking process of the pedicle screw. If the opening of the screw seat expands, the pedicle screw cannot be locked as a whole, and the overall fixation will fail, which is dangerous to use

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