Safe in the body
Titanium is considered the most biocompatible metal – not harmful or toxic to living tissue – due to its resistance to corrosion from bodily fluids. This ability to withstand the harsh bodily environment is a result of the protective oxide film that forms naturally in the presence of oxygen.One of the causes of implant failure can be attributed to allergic reactions to titanium. There have been reports of hypersensitive reactions such as erythema, urticaria, eczema, swelling, pain, necrosis, and bone loss due to titanium dental implants [15, 67, 68].
When they do occur, titanium allergy symptoms can range from mild to severe and can include:
- loosening of the implants (or implant failure)
- rash or hives.
- sores and swelling in the soft tissues of the mouth.
- chronic inflammation in the gums around the implant.
- problems with wound healing.
- chronic fatigue syndrome.
There is no known biological role for titanium. There is a detectable amount of titanium in the human body and it has been estimated that we take in about 0.8 mg/day, but most passes through us without being adsorbed. It is not a poison metal and the human body can tolerate titanium in large dose.
Like all metals, titanium releases particles through corrosion. These metals become ions in the body and bind to body proteins. For those who react, the body's immune system will attack this structure.
Both titanium and its alloys are far and away the most commonly used metals for implants, as well as for other medical devices that must fuse to the bone, such as joint or hip replacements. The bottom of the titanium root can be inserted into a smal, l precisely made pocket in the bone.
Titanium can take single hits from high-caliber bullets, but it shatters and becomes penetrable with multiple hits from military-grade, armor piercing bullets. Pure titanium isn't bulletproof, but certain titanium alloys are.
The titanium and Co-Cr alloys do not corrode in the body; however, metal ions slowly diffuse through the oxide layer and accumulate in the tissue. Superior fracture and fatigue resistance have made metals the materials of choice for traditional load-bearing applications.
Titanium is approximately three to four times stronger than stainless steel, which means its lifespan over generations is slightly longer. However, titanium can scratch, so its care entails routine polishing, or it risks becoming dull and marred.
Implant roots, however, fuse chemically and physically to the bone tissue. The bottom of the titanium root can be inserted into a smal, l precisely made pocket in the bone. It fuses firmly and then functions just like an ordinary tooth root , anchoring a lifelike artificial crown.
Strong, yet light weight: Titanium is lighter weight than stainless steel (approximately 56% as dense) yet has a yield strength twice that of stainless steel and ultimate tensile strength almost 25% higher. This gives it the highest strength-to-weight ratio of any metal suited to medical use.
There are several things that are special about titanium. Titanium metal is a very durable metal for engineering applications because this metal is corrosion-resistant and also this metal is very strong and very light. It is 40% lighter than steel but as strong as high-strength steel.
Does titanium have any healing properties? Titanium and its oxide are non-toxic, and the rate of corrosion of titanium implants is extremely low. So titanium has significant utility as an implant material compared to alternatives like stainless steel.
Titanium dental implants can cause corrosion and wear. The accumulation of titanium ions and particles can occur systemically as well as in the surrounding tissues, which can lead to toxic reactions in other tissues including yellow nail syndrome.
Titanium usually costs $30.00 per lb, this is significantly higher than other metals mostly because of its rarity, but it is also very hard to work with.
Titanium is stronger and lighter in weight compared to stainless steel. Titanium has a large resistance to repeated loads making it ideal for its application as an implant. With a lower modulus of elasticity compared to stainless steel, titanium is less rigid which limits the amount of stress on bone structures.
Screws used in surgical operations are often made of titanium. They usually have to be removed after a while or replaced by new ones. A new biomaterial makes this unnecessary. It promotes bone growth and is biodegradable.
A wide range of surgical instruments are made in titanium. Titanium instruments withstand repeat sterilisation without compromise to edge or surface quality, corrosion resistance or strength. Titanium is non magnetic, and there is therefore no threat of damage to small and sensitive implanted electronic devices.
Titanium is a paramagnetic material that is not affected by the magnetic field of MRI. The risk of implant-based complications is very low, and MRI can be safely used in patients with implants.
Uses in Medicine
Titanium is used to replace failed hard tissues, and is the most common metal used on hip joints, knee joints, bone plates, cardiac valve prostheses, pace makers, bone screws, nails, and other similar applications.The biocompatible materials used for bone plates are: stainless steel (SS), cobalt base alloys, bioceramics, titanium alloys, pure titanium, composite materials, and polymers (non-resorbable and bioresorbable).
Summary: Screws used in surgical operations are often made of titanium. They usually have to be removed after a while or replaced by new ones.
After a bone fracture has mended, metal implants such as pins, plates and screws (usually made from surgical steel or titanium) are in fact no longer useful. The removal operations were usually successful, but were not completely free of risk.
It turns out that titanium is weakly magnetic (compared to other ferromagnetic materials) in the presence of an externally applied magnetic field. All interact with the magnet except the titanium. The same effect can be seen when you drop a strong magnet down an aluminum or copper tube.
But why is it so expensive? Titanium cannot be extracted by using carbon to reduce the ore as it forms titanium carbide making the metal very brittle. It is the complexity of this process and the energy expended in production that gives titanium its high market price.
The X-Men superhero won't be the only one with metal fused into his skeleton if a new titanium foam proves suitable for replacing and strengthening damaged bones. Bone implants are typically made of solid metal – usually titanium. Though well tolerated by the body, such implants are significantly stiffer than bone.
It depends on what kind of material, for general industrial use CP titanium grade, price is cheap US$17/KG, for titanium alloy especially for medical use price could be as high as US$300/kg, different requirements, prices are diverious.
It is the ninth most abundant element in the Earth's crust. The most important minerals for mining titanium are rutile and ilmenite. The top producing countries of these ores are Australia, South Africa, and Canada.
Indeed, titanium has the highest strength-to-weight ratio of any natural metal known to man. Pure titanium is stronger than standard steel, while being less than half the weight, and can be made into even stronger alloys. When it comes to manufacturing, the only strong natural metal worth caring about is titanium.
