According to Liu Zengqian, the hardness and modulus of traditional zirconia ceramic dentures are much higher than that of human teeth. When people install such dentures, they will accelerate the wear of the jaw and the normal teeth in contact with both sides. The new denture material developed this time has a microscopic structure similar to that of natural shells. Zirconia is arranged in parallel in the form of sheets or closely stacked in the form of "brick walls", and the gaps between them are filled with resin.
In the experiment of new denture materials and teeth grinding, the new material has a lower friction coefficient than zirconia ceramics, which can reduce the wear of dentures on normal human teeth. The scientific research team believes that the new denture material retains the excellent biocompatibility, corrosion resistance and aesthetic effects of zirconia ceramics, and has a certain degree of plastic deformation ability and unique dynamic energy dissipation characteristics, that is, the denture can pass through adhesion under force. Elastic deformation consumes the energy exerted by external force, thereby protecting the gums and grinding teeth.
Liu Zengqian said that compared with all other denture materials on the market, the new type of bionic composite denture material has a high degree of matching with normal human teeth in terms of mechanical properties, good processing performance, and superior fracture toughness, or it can improve the use effect of the denture and extend its service life. Currently, the research team is conducting further research on the fatigue performance, coloration and biocompatibility of the new denture materials under simulated cyclic occlusion conditions.
