Artificial bone structure having density gradient

Abstract

The invention discloses an artificial bone structure having a density gradient. The artificial bone structure comprises an artificial bone body with a preset shape, and a plurality of absorption holes formed in the artificial bone body, wherein a first connection section of the artificial bone body is connected with a broken bone at the side needing a higher absorption rate and is absorbed by the broken bone at the side needing the higher absorption rate; a second connection section of the artificial bone body is connected with a broken bone at the side needing a lower absorption rate and is absorbed by the broken bone at the side needing the lower absorption rate; the density of the absorption holes formed in the first connection section is larger than that of the absorption holes formed in the second connection section; the artificial bone body is a calcium sulfate mixture or a calcium phosphate mixture; the density of the absorption holes formed in the artificial bone body is proportional to the absorption rate needed at the position; the apertures of the absorption holes formed in the artificial bone body is proportional to the absorption rate needed at the position. Therefore, the artificial bone structure can regulate the absorption speed of an artificial bone according to the difference of wound healing surfaces, so that the structural strength and bone healing effect of the artificial bone are guaranteed.

Description

technical field [0001] The invention belongs to a medical appliance, in particular to an artificial bone structure with a density gradient. Background technique [0002] Artificial bone refers to an artificial biomaterial that can replace human bone or repair bone tissue defects, and is widely used in modern orthopedic medicine. In open wedge osteotomy, the stability and bony union of the osteotomy site are important factors affecting the early recovery of patients and the incidence of complications. According to the traditional open wedge osteotomy, bone grafting is required when the bottom edge of the open wedge exceeds 1.5 cm. In the past, autologous bone, allogeneic bone, and absorbable artificial bone can be used for bone grafting. Absorbable artificial bone graft has the advantages of convenient use, no donor site damage and complications, sufficient source, no allogeneic bone-related infection and rejection, etc., so it is increasingly favored clinically. However, t...

AI Technical Summary

Problems solved by technology

However, the existing absorbable artificial bone has problems such as weak structural strength and uncontrollable absorption speed.

If the artificial bone is absorbed prematurely, the local strength will decrease rapidly, and the new bone will not have time to crawl and replace, which will easily cause local strength weakness; if the artificial bone is absorbed too slowly, it will hinder the new bone to crawl and replace, and it is also not conducive to bone healing

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