An allogeneic meniscal graft harvesting device and method

Abstract

The invention provides a device and method for obtaining allogeneic meniscus grafts, which include a Kirschner wire, an electric drill, a retrieving drill, a drill base and a hollow screw; wherein the retrieving drill is provided with a cylindrical hollow drill string, hollow The free end face of the drill string is provided with axially protruding serrations; one end of the drill base is connected to the power output shaft of the electric drill, and the other end is fixedly connected to one end of the reclaiming drill. The drill base is provided with an axial hollow cavity. The hollow drill string is assembled with the axial hollow cavity of the drill bit base to form a guide cavity; the hollow screw is coaxially built in the guide cavity, and its inner diameter is set in cooperation with the diameter of the Kirschner wire. Using the allogeneic meniscus graft harvesting device to obtain the allogeneic meniscus with a cylindrical bone block structure can increase the contact area with the bone structure on the side wall of the cylindrical bone tunnel made during meniscus transplantation, thereby promoting bone formation. The integration of the block and the side wall of the bone tunnel shortens the time of bone integration.

Description

technical field [0001] The invention relates to the technical field of meniscus transplantation, in particular to an allogeneic meniscus graft acquisition device and method. Background technique [0002] The meniscus is a meniscus-shaped fibrocartilaginous tissue between the femoral condyle and the tibial plateau, and is divided into medial and lateral menisci. The meniscus is a semi-circular structure, showing a wedge-shaped structure with a thick outer periphery and a thinner inner edge, matching the cartilage of the femoral condyle, with a flat bottom surface and adapting to the tibial plateau. The meniscus is tough and elastic, which can buffer the impact of the femoral condyle and the tibial plateau during joint movement, and play a role in absorbing shock, buffering decompression, lubricating the joint, and maintaining joint stability. [0003] With the increasing frequency and intensity of people participating in sports, the incidence of meniscus injury is also incre...

AI Technical Summary

Problems solved by technology

The obtained bone block has a square structure, while the bone tunnel used to fix the bone block has a cylindrical structure, resulting in a significant reduction in the contact area between the bone block and the side wall of the bone tunnel, thus prolonging the length of time between the bone block and the side wall of the bone tunnel. The integration time of the wall bone will ultimately affect the fixation strength of the bone block and the postoperative recovery time of the patient; secondly, directly using the pendulum saw to remove the bone will increase the risk of damage to the meniscus attachment structure

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