Innovative Hair-Based Toothpaste Promotes Natural Enamel Repair

Researchers at King's College London have developed a groundbreaking dental treatment using keratin derived from human hair, wool, or skin to create a natural protective coating for teeth. This novel approach aims to repair and strengthen damaged enamel, offering a sustainable alternative to traditional dental therapies.

The key to this innovation lies in keratin, a protein present in hair, skin, and wool. When applied to teeth, keratin forms a highly organized, mineral-rich scaffold that mimics the structure of natural enamel. This process encourages the attraction of calcium and phosphate ions from saliva, facilitating the growth of a new, enamel-like mineral layer.

Dr. Sherif Elsharkawy, a senior author of the study, explains that unlike bones and hair, enamel does not regenerate once lost. Factors such as acidic foods, poor oral hygiene, and aging accelerate enamel erosion, leading to increased tooth sensitivity, pain, and eventual tooth loss. While fluoride-based toothpastes have been the standard for slowing decay, keratin treatments could provide a complete stop to enamel deterioration.

This innovative approach can be incorporated into daily use toothpaste or applied professionally as a gel, similar to a nail varnish for targeted repair. Early research indicates that keratin not only restores structural integrity but also seals nerve channels within the tooth, reducing sensitivity and discomfort.

The team anticipates that keratin-based dental products might reach the market within two to three years, pending further clinical testing and regulatory approval. The research, published in "Advanced Healthcare Materials," highlights the sustainable and eco-friendly aspect of keratin, which can be sourced from waste materials like hair and wool, reducing reliance on synthetic and toxic substances used in current dental restoration techniques.

Lead researcher Sara Gamea emphasizes that this technology bridges the gap between biology and dentistry, providing a natural, circular solution that aligns with environmental sustainability goals. She further notes that keratin could eventually replace less durable and more toxic restorative materials, offering a more natural and enduring solution for dental care.

This pioneering study marks a significant step forward in regenerative dentistry, potentially transforming how we approach enamel repair in the future, with benefits for both health and the environment.