Instrument for grafting bones in lesion vertebral body of percutaneous vertebral pedicle

Abstract

The invention relates to an instrument for grafting bones in a lesion vertebral body of percutaneous vertebral pedicle. The instrument comprises a bone grafting mechanism and a driving mechanism used for driving the bone grafting mechanism, the bone grafting mechanism comprises a bone grafting cylinder, a lead screw and a pushing assembly, and one end of the bone grafting cylinder is provided with a bone grafting bin; the lead screw is arranged in the bone grafting cylinder and rotates relative to the bone grafting cylinder, the pushing assembly corresponds to the bone grafting bin and is connected with the lead screw, the pushing assembly comprises a screw rod connected with the lead screw, and the periphery of the screw rod is separately sleeved with a left guide block and a right guide block which are connected with the screw rod; and the left guide block and the right guide block are connected with a push plate matched with the bone grafting bin through a connecting part, and the push plate ascends and descends in the bone grafting bin through the pushing assembly. According to the instrument for grafting the bones, bone grafting materials such as bone grains in the bone grafting bin are pushed out through the pushing mechanism, and meanwhile, a collapsed end plate is pushed and reset, so that the integration of end plate resetting and bone grafting under the end plate is achieved.

Description

technical field [0001] The invention belongs to the technical field of orthopedic medical devices, and in particular relates to a percutaneous pedicle bone grafting device in diseased vertebrae. Background technique [0002] The thoracolumbar vertebral body (thorax 8 to lumbar 5) is prone to compression fractures, and the following changes will occur after vertebral body compression fractures: 1. The compression of the spinal canal by the fragmented bone can cause paralysis of the spinal cord compression limbs; 2. Loss of vertebral body height , Vertebral instability; 3. The cancellous bone of the vertebral body is compressed into a mass, and a large amount of bone pulp is lost from the fracture gap. In recent years, people have widely used pedicle internal fixation devices to treat thoracolumbar vertebral body compression fractures, and obtained excellent effects such as vertebral height recovery and firm fixation. However, due to the compression of cancellous bone into clu...

AI Technical Summary

Problems solved by technology

[0003] Thoracic and lumbar fractures are common clinically. Posterior short-segment fixed reduction has always been the mainstream method of surgical treatment. However, in the later stage, vertebral body re-loss, internal fixation failure, and kyphosis aggravation may occur. The above-mentioned situations are mainly due to During the operation, the local "eggshell-like" cavity formed after the reduction of the injured vertebrae was not filled with targeted bone graft, which made the middle and anterior column of the spine lose its structural integrity and load-bearing stability

Images