Polished Tantalum Rod

At room temperature, tantalum does not react with hydrochloric acid, concentrated nitric acid, or even aqua regos, and ordinary inorganic salts will not corrode it. Chemically extremely stable, it resists corrosion by all inorganic and organic acids except hydrofluoric acid, sulfur trioxide, hot concentrated sulfuric acid, and alkalis.  and the anti-brittle performance, anti-high temperature bending performance and anti-drawing performance of the products can be improved according to the requirements of customers. The difference in elastic modulus between pure tantalum and bone tissue is large, which is not conducive to osseointegration. As a new type of orthopedic implant material, porous tantalum has an interconnected internal structure and is to interwoven in both directions. It has physical properties such as high porosity, low modulus of elasticity, and high surface friction coefficient.

In terms of mechanical properties, porous tantalum is superior to solid tantalum and other commonly used medical metal materials. Its special pore structure makes its elastic modulus between that of human cancellous bone and cortical bone, making it particularly suitable for bone replacement, joint replacement, and human tissue filling. It can provide mechanical strength while reducing stress shielding, facilitating stress conduction, facilitating bone shaping, and also has excellent osteoinductive properties, and is widely used in the field of orthopedics, and has achieved ideal results.

Compared with other porous materials, the friction coefficient of porous tantalum is 0.80 and 0.74 relative to the cancellous bone and cortical bone, respectively, which is 40% to 80% higher than that of traditional metallic materials. This helps bond between the host bone interface and enhances the stability of the initial implantation. Unlike traditional medical metal materials, biological tissue grows on tantalum after a period of implantation, just as it does on real bone. This is why tantalum is also known as a "pro-metal".

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