Porous tantalum nail design

Clinical Need

For patients with femoral neck fracture, hollow compression internal fixation screw is commonly used clinically. Relevant studies have shown that the rate of femoral head necrosis caused by this fixation can be as high as 45%, and even for non-displaced femoral neck fractures, the rate of femoral head necrosis is as high as 22.5%, mainly due to the traditional hollow nail fixation technique, which can destroy the epiphyseal artery network and damage the blood supply of the femoral head, leading to iatrogenic femoral head necrosis. In addition, when the hollow nail is fixed, the tip does not exceed the epiphyseal plate, which is the key to reduce the damage to the blood supply in the femoral head. On the one hand, the porous structure is similar to the bone trabecular structure, the mechanical properties match the bone tissue, has good biocompatibility, and has bone integration, which is conducive to bone growth. Tantalum metal can induce new bone generation and promote early fracture healing.

Design Scheme

The company cooperated with the First Affiliated Hospital of Army Medical University, led by Professor Chen Guangxing, deputy director of Joint Surgery Department, and guided the 3D model design. The porous tantalum rod prepared by the company's powder bed electron beam 3D printing technology has become a new medical products for the treatment of femoral neck fracture. On the other hand, tantalum fixation screws have protective effect on epiphyseal arterial reticulum. With the continuous growth of bone tissue after implantation, the fixation strength of porous tantalum nail will gradually increase, and at the same time, the blood transport will be brought into the nail body, which is conducive to preventing the occurrence of fracture nonunion and femoral head necrosis. Therefore, porous tantalum nail has a good long-term effect in the treatment of femoral neck fracture, and has a broad application prospect in orthopedics and other medical disciplines through biology.（Guangzhou Sailong Production Technology Department/Feng Kehan）