Bone cement block combined with bone cement with different parameters, and injection device of bone cement block

Abstract

The invention relates to a bone cement block combined with bone cement with different parameters, and an injection device of the bone cement block. The bone cement block combined with the bone cement with different parameters and the injection device of the bone cement block comprise the bone cement block formed by combining the bone cement with different parameters (elastic modulus, compression strength and the like), and a special gun head used for injecting the bone cement block into a balloon dilatation area, wherein the special gun head comprises an outer casing pipe and an inner pipe, and the inner pipe is arranged in the center of in the outer casing pipe; the bottom end of the inner pipe is in sealed connection, and one side of the bottom of the inner pipe communicates with a first outlet extending out of the outer casing pipe; and a semi-opening or completely-opening structure is formed between the outer casing pipe and the inner pipe. The bone cement block has the advantages that the two kinds of bone cement are respectively injected into the fractured position of the vertebral body through the special gun head to form the bone cement block with the small peripheral elastic modulus and the large internal hardness, so that the stress of the fractured vertebral body and the pressure of the bone cement on the adjacent vertebral body can be reduced, and the occurrence rate of re-fracture and the fracture of the adjacent vertebral body is reduced.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a bone cement block combined with bone cement with different parameters and an injection device thereof. Background technique [0002] With the aging population in China, the number of patients with compression fractures caused by osteoporosis is increasing. Bed rest, anti-osteoporosis drugs, and surgery are often used in clinical treatment. Percutaneous kyphoplasty (PKP), as a minimally invasive, rapid pain relief and effective surgical method, has been gradually and widely used in patients with osteoporotic compression fractures. However, studies have found that the elastic modulus of bone cement is significantly greater than that of cortical bone and cancellous bone in osteoporotic fractures. After the injection of bone cement, the stiffness and strength of the vertebral body will increase significantly, which will easily lead to recurrent fractures of the fractured ve...

AI Technical Summary

Problems solved by technology

But about a bone cement with different parameters combined to form a bone cement block with a small peripheral elastic modulus and a large internal hardness, and it is convenient to inject the bone cement block into the vertebral fracture site during the operation, thereby reducing the stress and stress of the fractured vertebral body. The pressure of the bone cement on the adjacent vertebral body can reduce the incidence of refracture and adjacent vertebral body fracture. There is no related report on a bone cement block and its injection device that combines different parameters of bone cement.

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