Bone fusion pedicle screw for internal fixation of spine for osteoporosis condition

Abstract

The invention discloses a bone fusion pedicle screw for internal fixation of spine for an osteoporosis condition. The screw can be rotated into the spine body through rotating the screw body . In the rotating process, a planing mechanism can automatically cut and collect spongy bone sclerotin which can enter a hollow pipe through an orifice of the pipe side wall. The osteoblasts in the spongy bone sclerotin become new bones under the action of osteogenesis substances through differentiation and proliferation, and / or reduce the activity of osteoclasts under the action of osteoclast activity inhibiting substances to strengthen the osteogenic action, and finally new bones are formed in the hollow pipe to form a 'screw-new bone' integral structure with the screw, the holding force of the screw is strengthened, and therefore the integral stability of the in-spine fixing system is enhanced, and the successful rate of the surgical operation is enhanced.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and relates to a bone fusion pedicle screw used for spinal internal fixation under the condition of osteoporosis. Background technique [0002] Spinal fixation surgery is a common method for clinical treatment of spinal instability caused by the imbalance of the three columns of the spine. The pedicle screw is an important part of the spinal internal fixation system. Ensuring the strong fixation of the screw directly implanted in the vertebral body is the prerequisite for realizing the stability of the entire spinal internal fixation system, so as to achieve the effect of clinical treatment. However, with the increase of the elderly population, tumors, inflammation and metabolic diseases, the structure of the cancellous bone trabecula on which the screws are firmly held often degenerates, bone density decreases, and the long-term stability of the screws after implantation is difficult to ...

AI Technical Summary

Problems solved by technology

The above method can improve the stability of the internal fixation system to a certain extent, but there are still many shortcomings and defects, such as increasing the diameter of the screw, so that the possibility of pedicle damage increases during the process of screwing the screw into the vertebral body through the pedicle ;Increasing the length of the screw increases the possibility of damage to the large blood vessels in front of the spine; when polymethyl methacrylate bone cement strengthens the screw channel, polymethyl methacrylate generates local high heat and damages nerves, and the amount of PMMA is uncontrollable and leaks There is a risk of compressing the nerve and causing pulmonary embolism in severe cases, and the effect of the second revision operation of the enhanced screw channel is inaccurate; when the bone coating is screwed into the vertebral body, the coating falls off, and the treatment effect is inaccurate; Complicated operation, prolonged operation time, etc.

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