Nitto Seiko develops medical magnesium for implant materials | FASTENER EURASIA MAGAZINE
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Nitto Seiko develops medical magnesium for implant materials

by Shun Otsuki
President & Editor in Chief KINSAN FASTENER NEWS


Nitto Seiko (Kyoto Prefecture) has succeeded in developing "Medical biosoluble high-purity magnesium" that has been jointly researched and developed with Kyoto Prefectural University of Medicine and University of Toyama with the support of Kyoto Prefecture. They filed a patent application for the world's first technology.

Magnesium, which has been attracting attention as a medical implant, has a problem that it dissolves in a living body for a very short period of time and disappears before the treatment of the affected area.
In the joint research, they developed a pure magnesium material that can control the period of dissolution and absorption in the living body, and technically established that it can be used for specific implant parts. According to the company, it is the world's first technology to control the dissolution period using pure magnesium.

The pure magnesium produced in this research succeeded in reducing the total amount of impurity elements such as Al, Zn, and Pb to 0.05% or less of the weight by using their unique metal refining technology.
Unlike magnesium alloys, it is pure magnesium with a purity of 99.95% or higher, so it has extremely high affinity for living organisms and can be expected to be applied to implant products with excellent biosafety.
It is unlikely to affect imaging by X-ray imaging in the medical field, and it is easy to observe the imaging site because there is little difference in X-ray transmittance from bone and body fluid.

Due to the characteristics of magnesium material, which is stronger than resin and softer than titanium alloy and stainless alloy, it has the advantage of being easy to process into an implant shape that matches the patient's treatment site.
In the future, the company will proceed with preparations such as approval of medical devices in order to introduce medical implants using the same material to the market. Intramedullary nails, screws, bone plates, etc. can be expected to be applied. It eliminates the need for implant removal surgery after osteosynthesis, which was previously required for metal implant surgery, and can reduce the burden on patients.