Vertebral body intensifier for treating compression fracture of vertebral bodies

Abstract

The invention relates to a vertebral body intensifier for treating compression fracture of vertebral bodies. The vertebral body intensifier is characterized in that a body of the vertebral body intensifier is a right prism or a cylinder; the body is provided with a center hole running through the front and rear end faces; the center hole of the body is provided with an internal thread; side holes leading to the center hole are formed in the sides of the body; external threads or reverse teeth are arranged on the sides of the body; the positions, close to the rear end face, on the sides of the body sink to form clamp faces; and different shapes of development marks are arranged on the front and rear end faces of the body. The vertebral body intensifier has the advantages that the mechanical parameters of artificial bone materials, such as elastic modulus, are close to the mechanical parameters of bones, so the occurrence rate of refracture of adjacent vertebral bodies can be reduced; the vertebral body intensifier does not have mobility, so the position, form and volume of the vertebral body intensifier are more controllable when the vertebral body intensifier is implanted and the forms of the vertebral bodies can be better restored; the vertebral body intensifier is a solid implant, so the complications, such as pulmonary embolism and bone cement leakage, do not exist; and after being implanted, the artificial bone materials can be well fused with the bones for a long term, thus avoiding pain caused by interface microfracture.

Description

technical field [0001] The invention relates to the technical field of orthopedic medical devices, in particular to a vertebral body enhancer for treating vertebral body compression fractures. Background technique [0002] With the development of an aging society, there are nearly 1.81 million new patients with osteoporotic vertebral compression fractures every year. According to statistics, about 16% of postmenopausal women and 20% of people over the age of 70 have had vertebral fractures. The most commonly used method for clinical treatment of vertebral compression fractures is vertebroplasty. In recent years, minimally invasive percutaneous vertebroplasty (PVP) and percutaneous kyphoplasty (PKP) have been developed. Due to its small trauma and rapid pain relief, it is a new and effective treatment method for osteoporotic vertebral compression fractures. It has achieved satisfactory clinical results and significantly improved the quality of life of patients. [0003] Pol...

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Problems solved by technology

[0003] Polymethyl methacrylic (PMMA) bone cement is a widely used implant material in PKP and PVP surgery. It has the advantages of high mechanical strength and fast curing speed. There are significant defects: the elastic modulus of PMMA is 4 to 40 times that of the cancellous bone of the vertebral body. Excessively high elastic modulus leads to an excessive increase in the hardness of the formed vertebral body, resulting in stress concentration, which in turn causes re-compression fracture of the adjacent vertebral body; PMMA Lack of biological activity, cannot be degraded and absorbed, exists in the vertebral body in the form of foreign bodies for a long time, etc.

But there is no report yet about a kind of vertebral body enhancer for the treatment of vertebral body compression fractures of the present invention

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