Scraping device and scraping method

Abstract

The invention discloses a scraping device and a scraping method. The scraping device comprises a drill rod, a drill located at the front end of the drill rod and a drill cover; the drill cover is internally provided with a first channel, the drill rod penetrates into the first channel to be installed in the drill cover, wherein the drill comprises a conical part connected with the drill rod and agroove-shaped part located on the side face of the conical part, and the first channel is eccentrically arranged in the drill cover. When the drill rotates with the drill rod, the groove-shaped part on the side face of the conical part makes the area swept by the drill larger, and the groove-shaped structure makes a to-be-scraped object more easily scraped. The first channel is eccentrically arranged in the drill cover, by rotating the drill cover, the position of the drill moves along the drill cover in the circumferential direction, the drill rotates in all the positions in the directions ofthe drill cover, a to-be-scraped area larger than the size of the cross section of the drill cover can be scraped, and the large to-be-scraped area is scraped on the to-be-scraped object through a small channel.

Description

technical field [0001] The invention belongs to the field of scraping instruments and their use, and more particularly relates to a scraping device and a scraping method. Background technique [0002] Osteonecrosis is a common disease in orthopedic medicine at present, and the method for the treatment of osteonecrosis by existing orthopedic surgery mainly adopts to remove the necrotic bone in the necrotic area first, and then insert artificial bone material. [0003] In the prior art, in the process of scraping necrotic bone, hollow ball drills and spatulas are used, and before scraping, it is necessary to drill a passage from the outside to the necrotic area on the bone, so as to facilitate the insertion of the drill bit and the spatula. However, for example, in the process of removing necrotic bone in the femoral head, the tissue hardness and texture in the necrotic area of ​​the femoral head are not uniform, and sclerotic bands and cystic changes exist alternately. In th...

AI Technical Summary

Problems solved by technology

However, for example, in the process of removing necrotic bone in the femoral head, the tissue hardness and texture in the necrotic area of ​​the femoral head are not uniform, and sclerotic bands and cystic changes exist alternately. During the work, it was found that the cystic degeneration area is often easy to remove or even remove too much to penetrate the articular surface, while the hardened part is difficult to remove, which seriously affects the removal of necrotic bone and the improvement of blood supply in the necrotic area

In addition, in order to ensure a better therapeutic effect, the operation needs to remove all the necrotic bone. However, the sequestrum cannot be completely removed through the narrow bone tunnel, and the expansion of the bone tunnel will aggravate the damage to the normal bone.

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