Researchers have developed a new way to grow mineralized materials which could regenerate hard tissues such as dental enamel and bone. Enamel, located on the outer part of our teeth, is the hardest tissue in the body and enables our teeth to function for a large part of our lifetime despite biting forces, exposure to acidic foods and drinks and extreme temperatures. The study was published in Nature Communications.
This remarkable performance results from its highly organized structure. They shows that this new approach can create materials with remarkable precision and order that look and behave like dental enamel. However, unlike other tissues of the body, enamel cannot regenerate once it is lost, which can lead to pain and tooth loss. These problems affect more than 50% the world's population and so finding ways to recreate enamel has long been a major need in dentistry.
The materials could be used for a wide variety of dental complications such as the prevention and treatment of tooth decay or tooth sensitivity – also known as dentin hypersensitivity.
This is exciting because the simplicity and versatility of the mineralization platform opens up opportunities to treat and regenerate dental tissues. The mechanism that has been developed is based on a specific protein material that is able to trigger and guide the growth of apatite nanocrystals at multiple scales similarly to how these crystals grow when dental enamel develops in our body.
This structural organization is critical for the outstanding physical properties exhibited by natural dental enamel. A major goal in materials science is to learn from nature to develop useful materials based on the precise control of molecular building-blocks. The key discovery has been the possibility to exploit disordered proteins to control and guide the process of mineralization at multiple scales.
Through this, they have developed a technique to easily grow synthetic materials that emulate such hierarchically organized architecture over large areas and with the capacity to tune their properties.
Enabling control of the mineralization process opens the possibility to create materials with properties that mimic different hard tissues beyond enamel such as bone and dentin. As such, the work has the potential to be used in a variety of applications in regenerative medicine. In addition, the study also provides insights into the role of protein disorder in human physiology and pathology.