Why Is Titanium Biocompatible? The Science Behind Its Biocompatibility and Industrial Applications

What is the Essence of Biocompatibility?

Biocompatibility refers to the property whereby human tissue does not reject a metal upon contact, and the metal material is able to perform its intended function.

Defects in ordinary metals:

First, they release toxic metal ions, which can cause allergic reactions and tissue necrosis in the human body;

second, the electrical imbalance on the metal surface causes protein denaturation and immune activation.

Metals used in the medical field must be non-toxic, non-immunogenic, non-carcinogenic, and non-hemolytic. Titanium meets all of these requirements and also promotes bone cell growth.

The Core of Titanium’s Biocompatibility—the Oxide Layer

When titanium comes into contact with air or human body fluids, it can form a dense oxide film TiO2, and if this oxide film is scratched, it will repair itself.

This oxide film will not dissolve with body fluids, will not react chemically with acids or bases, and will not release toxic ions.

The hydroxyl positive and negative charges on the surface of the oxide film are balanced, and the protein structure in the human body will not be damaged.

In addition, this oxide film carries a weak negative charge, which will adsorb onto calcium ions in the body. After reacting with phosphate ions, hydroxyapatite can be formed. This is the main component of human bones. Thereby promoting the growth of bone cells.

How is Titanium Combined with Bones?

Titanium binds to chemical bonds in human bone tissue to promote bone cell growth.

After orthopedic implants are placed in the human body, 24 hours later, the oxide film on the surface of titanium will form a bioadhesive layer on the surface of blood proteins.

After a month, calcium ions are deposited in the human body, which will promote the formation of hydroxyapatite crystallization, after which bone cells will also begin to grow on the surface of titanium.

After 3-6 months, the bone cell tissue will fully grow on the surface of the titanium. And there is no rejection reaction in human tissues.

Other Immune Properties of Titanium

Immunosuppressive Properties

The immunosuppressive properties of titanium refer to the fact that when titanium implants are implanted in the human body, titanium can inhibit the immune system’s attack on it and promote the growth of bone tissue.

Low Sensitivity

The low sensitivity of titanium means that it is not allergic when it comes into contact with human tissues, because there is no metallic nickel in the chemical composition of pure titanium.

Non-magnetic and Low Thermal Conductivity

Titanium itself has no magnetism. So when titanium implants are in the human body, they will not interfere with MRI/CT examinations. In addition, titanium’s low thermal conductivity is very compatible with human body temperature, making it the best medical implant.

Applications of Biocompatibility of Titanium

Medical Field

Titanium is used in a wide range of medical applications, including surgical instruments, heart valve stents, dental implants, orthopedic implants, artificial hip/knee joints, and more.

For medical application, you could consult THT medical titanium rod, medical titanium plate freely.

Titanium Products for Civil Use

Titanium tableware (titanium cutting boards, titanium cups, titanium pots, etc.), titanium jewelry (titanium necklaces, titanium rings, etc.), titanium glasses frames, titanium straps, electronic product shells, etc. all take advantage of titanium’s biocompatibility, low sensitivity and other characteristics.

Industrial Titanium Products

Food and beverage industry: Titanium is commonly used to make reaction vessels, storage tanks, etc.

Bioengineering and Pharmaceutical Sector: Titanium is commonly used in pharmaceutical production lines as a raw material for reactor and piping systems.

Environmental protection and water treatment: Titanium’s non-toxic properties are often used in water purification and freshwater dilution projects. For example, titanium products commonly used include: titanium mesh, titanium filter element, titanium fiber felt, titanium porous products, titanium aeration head, etc.

Conclusion

Titanium’s biocompatibility is a trait not found in other metals, which makes it widely used. Baoji Taihengte Metal Co., Ltd. has been committed to the production of titanium products for many years, if you need titanium products, you can consult us.

FAQ

Besides biocompatibility, what other immune properties does titanium possess?

Immunosuppressive properties, low sensitivity, non-magnetic, low thermal conductivity.

What are the applications of titanium’s biocompatibility in daily life?

In life, titanium glasses frames, titanium rings, titanium necklaces, etc. all use titanium biocompatibility.

What is long term effects of titanium in body?

Titanium in the human body has more benefits than risks. Because titanium is non-toxic, non-allergenic, non-carcinogenic, does not induce inflammation, and can promote the growth of bone tissue, the only effect is that in the long run, titanium implants may loosen.

What are titanium bone implants?

There are many types of titanium bone implants, including: bone plates, fracture screws, artificial hip joints, artificial knee joints, customized skull repair mesh, etc.

What are some biocompatible metals?

Titanium, tantalum, medical stainless steel, nickel-titanium alloy, magnesium alloy, zinc alloy, etc.

Which is better: titanium vs stainless steel implants?

If you need permanent implantation, then titanium is the best choice; If it is only a temporary implant and needs to be removed later, then choose stainless steel, which is also cheaper than titanium.