Release date: 2009-09-21
Researchers at Purdue University are currently developing a new application for laser technology that uses lasers to make arterial stents and more durable medical implants. It is reported that this method can speed up the production speed by 10 times and can also be lower than the current production cost.
Yung Shin, a professor of mechanical engineering at Purdue University, said the new technology is designed to cater to the world's vast artificial hip and knee market.
It is reported that by 2010, the number of people under the age of 40 who are receiving hip implants is expected to reach 40 million. By 2030, this number will double. In addition to accelerating production to meet expected demand, Shin said another goal of adopting new technology is to make implants last longer than they are today. “There are currently 200,000 total hip replacements in the United States, and their average life expectancy is about 10 years. This means that if you implant at the age of 40, you need to change it three or four times in your life.â€
According to Shin, one of the researchers' work techniques is to deposit a coating of the metal and ceramic powder by laser, and then immediately form a solidification of each layer. Since the technique can be partially molded in sequence, it is suitable for coating a titanium material with a ceramic material (bionic artificial bone). The results of the study will be presented at the International Medical Device Expo's Advanced Laser Applications Conference in San Jose, California this week.
Titanium or other metals do not match the stiffness or properties of the bone, so they need to be coated when they are used as implants. However, when ceramic is deposited on a metal, it is particularly undesirable that the metal may undergo a sharp change due to thermal expansion or chemical composition change, since cracks may occur. The corrective method is to gradually coat the coating and slow down the change.
This step-by-step coating method is called "functional gradient coating". The researchers used a laser deposition process to develop a porous titanium-based surface, as well as the outer surface of calcium phosphate. These designs are designed to be more traditional than conventional implants. Better match the stiffness of the bone. This technology allows researchers to create complex-shaped components to meet the patient's customized needs, creating tailor-made implants for each patient.
It is reported that this custom implant production time is only three days, compared with the previous 30 days, the production time is greatly shortened.
This process tightly bonds the coating material to the underlying titanium, steel or chromium. Tests show that the tightness is at least 7 times the industry's required standard. Researchers use computers to model, simulate, research, and optimize the entire process.
In addition, the researchers are also investigating a technique for making arterial stents using "ultra-short pulsed lasers." Shanghai Medical Device Industry Association
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