Biocompatible film is expected to fight tooth decay and tooth allergy
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Recently, researchers at Kinki University and Osaka Dental University have jointly developed an ultra-thin biocompatible film that can be placed on human teeth to prevent tooth decay or to make teeth look whiter. The researchers said that the film "tooth patch" made of hydroxyapatite is a super-flexible wear-resistant material. Because hydroxyapatite is also the main component of enamel, this method may also terminate the teeth. allergy.
“This is the world's first flexible apatite sheet, and we hope it will protect teeth or repair damaged enamel.†Professor Ben Jinmao, a professor of bio-orientation technology at Kinki University, said, “The past dentists It is believed that the film of all-apatite is only a dream, and our goal is to create artificial enamel." The enamel is the smoothest and hardest part of the outermost layer of the tooth.
The researchers fired a laser into the compressed hydroxyapatite block in a vacuum, causing a single particle to burst out. These particles fall to the surface of the salt block and are heated to form crystals. The salt is dissolved in water, and the film is picked up and placed on a filter paper to dry. It becomes tough and can be clamped with tweezers. The film thus produced has a thickness of only 0.004 mm.
"At this time, when you put it on the surface of the tooth, it becomes invisible. If you look at the light, you can barely see it." Benzin said that when the film is attached to the tooth. Because of its many micropores on the surface, liquids and gases can escape from below, and foam formation can be avoided. But one problem is that it takes almost a day for the film to stick firmly to the surface of the tooth.
The film is currently transparent, but it is also possible to make white to give teeth. The research team is experimenting with discarded human teeth and will soon conduct animal experiments. Benjinmao added that he is also experimenting with his own teeth.
Benjinmao also pointed out that the use of such dental films for the repair of teeth, such as covering exposed dentin (the sensitive layer under the enamel), may take another 5 years or more; Dental beauty can be achieved within 3 years. This technology has been patented in Japan and Korea and is currently being patented in the US, Europe and China.