公开(公告)号：US20220175432A1

公开(公告)日：2022-06-09

申请号：US17112573

申请日：2020-12-04

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Hsin-Hsin SHEN ,  Pei-I TSAI ,  Kuo-Yi YANG ,  Fang-Jie JANG ,  An-Li CHEN ,  Shih-Ping LIN ,  Chih-Chieh HUANG ,  Yi-Hung WEN ,  Wei-Lun FAN ,  Shin-I HUANG

IPC: A61B17/86

Abstract: A bone screw includes an external screw thread, an internal supporter structure and a porous layer. The internal supporter structure is inside the external screw thread. The internal supporter structure includes a screw thread supporter or a polygonal wall supporter. The porous layer is on a surface of the internal supporter structure. Therefore, the bone screw has an increased strength and also provides postoperative healing effect.