Scientists at the University of Nottingham have developed a new gel capable of regrowing damaged tooth enamel, a breakthrough that addresses a long-standing limitation in dental medicine. Unlike bone or skin, human tooth enamel lacks living cells and cannot naturally regenerate once lost. This new material offers a method to rebuild the protective outer layer of teeth, potentially reversing decay and strengthening structures that have been worn away by erosion.
The innovation stems from research conducted at the university’s School of Pharmacy and Department of Chemical and Environmental Engineering. The findings were published in Nature Communications. The gel is designed to repair enamel weakened by mineral loss while reinforcing healthy tissue. Its development marks a shift from traditional dental care, which focuses on protecting existing enamel, to a model that actively restores its structure.
Mimicking Natural Enamel Formation
The technology relies on a material composed of proteins that imitate the biological processes responsible for forming tooth enamel during early childhood. When applied to a tooth, the gel forms a thin, durable coating that penetrates the surface and fills microscopic cracks. This coating acts as a framework for rebuilding the mineral structure of the tooth.
The process utilizes calcium and phosphate ions, which are naturally present in saliva. The gel attracts these minerals and organizes them into new crystals that grow in an orderly pattern. Researchers describe this mechanism as epitaxial mineralization. This alignment allows the newly formed material to integrate structurally with the original tooth surface, recreating the precise arrangement of mineral crystals that gives natural enamel its hardness and durability.
Dr. Abshar Hasan, the study’s lead author and a postdoctoral fellow, emphasized the importance of this structural integrity. He noted that simply depositing minerals on a tooth is insufficient. The new material promotes the growth of crystals in an integrated manner, recovering the architecture of natural healthy enamel.
Addressing Dentin and Sensitivity
Beyond enamel repair, the gel shows promise in treating exposed dentin. Dentine is the softer layer of tooth tissue located beneath the enamel. It contains tiny channels that transmit sensations to the nerves inside the tooth. When enamel wears away or gums recede, this exposure often leads to significant sensitivity to hot, cold, sweet, or acidic foods.
The new gel encourages the formation of an enamel-like mineral layer over exposed dentin. This process can help reduce tooth sensitivity and improve the attachment of dental restorations such as fillings. The treatment contains no fluoride, distinguishing it from conventional remineralization products that can only protect teeth or repair early mineral loss but cannot reconstruct lost enamel.
Testing conducted by the research team simulated everyday conditions including brushing, chewing, and exposure to acidic foods. The regenerated enamel displayed mechanical properties comparable to healthy natural enamel. These results suggest the material provides more than a temporary protective coating, offering a durable solution for long-term dental health.
Enamel deterioration is a primary factor in tooth decay, a condition affecting nearly half of the global population. Poor oral health is linked to broader systemic issues, including diabetes and cardiovascular disease. By restoring the physical properties of teeth, this technology could alleviate pain, prevent infections, and reduce the risk of tooth loss.
Professor Alvaro Mata, who led the study, highlighted the practical design of the technology. He stated that the gel is safe, scalable, and easy to apply, making it suitable for routine dental care. The team has established a start-up company, Mintech-Bio, to commercialize the discovery. They aim to release a first product by next year, potentially making this regenerative treatment widely available to patients suffering from enamel erosion and dentin exposure.
Source: ScienceDaily
