The absorbable bone nail comprises an end cover structure at the top, the lower portion of the end cover structure is connected with a main body part which is in a cone
frustum shape and gradually contracts from top to bottom, the bottom of the main body part is connected with a cylindrical extension section, and the
tail end of the extension section is connected with a conical end part. The
diameter of the upper bottom of the cone-
frustum-shaped main body part is the same as that of the end cover structure; the
diameter of the bottom surface of the cone-shaped end part is the same as that of the extension section; wherein the end cover structure, the main body part, the extension section and the end part are coaxially arranged and adopt an integrally formed structure made of an allogeneic bone; the cone-
frustum-shaped main body part is wide in upper part and narrow in lower part, is consistent with the
diameter of the end cover, is gradually attached to a
bone tissue during implantation, the contact area is gradually increased, the main body part is fully embedded when the bottom of the end cover is attached to the surface of an alveolar bone, the resistance is suddenly increased, and a doctor is helped to accurately judge the depth. The end cover and the main body part are equal to be coaxial and are in a symmetrical and regular shape, inclination can be prevented when the device is implanted along the preset axis, observation is facilitated, and accuracy is improved. The allogeneic bone is of an integrated structure, and the
physical strength, the
biocompatibility and the absorbability are all considered. The
bone material can be absorbed by a
human body, and can induce osteoblasts to form new bones on the premise of ensuring a supporting effect, so that fusion substitution is realized. And slow absorption is realized in an induced osteogenesis process, so that secondary operation taking-out is avoided, and
reabsorption and reconstruction of soft and hard tissues caused by secondary operation are prevented.