Researchers at the University of Nottingham have developed a protein-based gel that can repair and regrow tooth enamel, something dentistry has never been able to achieve before. While earlier enamel regeneration gels have shown promise in the lab, this new Nottingham formulation is the first to be fast-tracked toward human clinical trials with a commercial product in sight. Published in Nature Communications in November 2025, the breakthrough addresses a problem affecting nearly half the world’s population: enamel degradation that leads to tooth decay, sensitivity, and eventual tooth loss. Unlike current treatments that only manage symptoms, this gel actively regrows tooth enamel by rebuilding its crystalline structure using minerals naturally present in saliva.
Why Tooth Enamel Cannot Heal Itself
Tooth enamel is the hardest substance in the human body, but it has a critical weakness: it contains no living cells. Unlike bone, skin, or muscle tissue, enamel cannot regenerate or repair itself once damaged. Every sip of acidic drink, every instance of aggressive brushing, and every bacterial acid attack slowly erodes this protective layer, and the damage is permanent.
The scale of the problem is enormous. According to the World Health Organization, approximately 3.7 billion people worldwide suffer from oral diseases, with enamel degradation being a primary contributor. The consequences extend well beyond the mouth:
- Tooth loss and chronic oral infections have been linked to diabetes and cardiovascular disease
- Exposed dentine causes persistent sensitivity to hot, cold, and sweet stimuli
- Weakened enamel increases vulnerability to cavities, which can lead to abscesses requiring root canals or extractions, issues that rank among the most common dental problems worldwide
- Advanced decay disproportionately affects older adults and those without regular access to dental care
Despite the scale of the problem, current treatments, fluoride varnishes, remineralizing toothpastes, and dental restorations like fillings and crowns can protect remaining enamel or replace lost tooth structure. None can restore what has already been lost. As Professor Paul Hatton from the University of Sheffield told the BBC, recreating natural enamel has long been considered the “Holy Grail” of dental materials science.
How the Nottingham Protein Gel Works
The new gel takes a fundamentally different approach: rather than coating or filling damaged teeth, it provides a biological scaffold that guides the natural rebuilding of enamel. The gel is composed of a protein-based material that mimics the function of amelogenin and other proteins responsible for orchestrating enamel formation during infancy.
When applied to a tooth, in a process similar to a standard fluoride varnish treatment taking under five minutes, the gel forms a thin, robust layer that penetrates microscopic holes and cracks in the enamel surface. This layer then acts as a scaffold, attracting calcium and phosphate ions from the patient’s own saliva and organizing them into the highly ordered crystalline structure characteristic of natural enamel.
This process, known as epitaxial mineralization, ensures that newly formed mineral crystals are structurally integrated with the underlying tooth tissue rather than simply deposited on top. The result is regenerated enamel that matches the architecture and mechanical properties of healthy, natural enamel, not just a protective coating.
Crucially, the gel contains no fluoride, making it an attractive option for patients and practitioners concerned about fluoride exposure.
The gel offers several practical advantages for clinical adoption:
- Biocompatible: protein-based and designed to work with the body’s natural chemistry
- Rapid application: under five minutes, similar to a standard fluoride varnish treatment
- Scalable manufacturing: designed for mass production rather than bespoke laboratory synthesis
- Familiar workflow: integrates into existing dental practice without specialized equipment
What the Lab Tests Revealed
The research team tested the gel on 32 extracted human molar teeth with demineralized or eroded enamel. Electron microscopy images published alongside the study show a striking transformation: before treatment, the enamel surface appears rough and pitted, with eroded apatite crystals. After two weeks of treatment, the same surface displays densely packed, uniformly oriented enamel crystals indistinguishable from healthy natural enamel.
Beyond structural regeneration, the team subjected the treated teeth to simulated real-world conditions: brushing, chewing forces, and exposure to acidic foods and drinks. In each case, the regenerated enamel performed on par with natural healthy enamel, demonstrating durability that goes beyond what laboratory remineralization experiments have previously achieved.
However, it is important to be precise about what the gel can and cannot do. The regenerated enamel layer measured up to approximately 10 micrometers in thickness. For context, natural enamel on a molar’s biting surface can reach 2,000 micrometers. This means the gel is designed for early-stage enamel erosion, white spot lesions, and micro-cavities, not for restoring teeth with advanced decay that has penetrated deep into the dentine. Patients with large cavities will still require traditional restorative dentistry, but the gel could prevent those cavities from developing in the first place.
It is also worth noting that all testing to date has been conducted on extracted teeth in laboratory conditions. The researchers have not yet published results from living human mouths, which is the necessary next step to confirm real-world effectiveness.
How It Compares to Current Enamel Treatments
To understand what makes this gel different, it helps to compare it directly against the treatments currently available to dentists and patients.
| Treatment | Mechanism | Regenerates Enamel? | Application | Availability |
|---|---|---|---|---|
| Fluoride Varnish | Strengthens existing enamel; inhibits bacterial acid | No; protects only | In-office, minutes | Widely available |
| Hydroxyapatite Toothpaste | Deposits synthetic mineral on surface | Partial; surface remineralization only | At-home, daily brushing | Widely available |
| CPP-ACP (Recaldent / GC Tooth Mousse) | Delivers bioavailable calcium and phosphate to enamel surface | No; surface remineralization only | In-office or take-home | Available (prescription in some regions) |
| Nottingham Protein Gel | Protein scaffold guides epitaxial mineral growth from saliva | Yes; regenerates organized enamel crystals up to ~10μm | In-office, under 5 minutes | Expected 2026+ |
| Dental Fillings / Crowns | Mechanical replacement of lost tooth structure | No; replaces, does not regenerate | In-office, requires drilling | Widely available |
What sets the Nottingham gel apart is not just that it remineralizes, as several products can do that to some degree, but that it regenerates enamel in an organized, structurally integrated way that recovers the mechanical properties of healthy tissue. This approach builds on a growing body of nanotechnology research aimed at strengthening and repairing enamel at the molecular level. The trade-off is that the regenerated layer is thin and the treatment is not yet commercially available.
When Will This Treatment Be Available?
The research team has moved quickly to translate their discovery toward clinical use. They have founded a spin-off company, Mintech-Bio, specifically to develop and commercialize the technology. Professor Alvaro Mata, Chair in Biomedical Engineering and Biomaterials at the University of Nottingham and a co-founder of Mintech-Bio, has stated that the company aims to have a first product available as early as 2026.
Clinical trials in human patients are scheduled to begin in early 2026. These trials will answer the questions that laboratory work cannot: how well the gel performs in the complex environment of a living mouth, how many applications are needed for lasting results, and whether the 10-micrometer regeneration layer translates to meaningful reductions in decay rates for patients. Regulatory approval from bodies such as the FDA in the United States and the European Medicines Agency will follow successful trial results.
The timeline is ambitious but not unrealistic for a product that builds on well-understood protein chemistry and a familiar clinical application method. The initial product is expected to be a professional, in-office treatment applied by dentists and dental hygienists, much like fluoride varnish is today.
Over-the-counter or take-home versions may follow as the technology matures.
Beyond Enamel: Treating Sensitivity and Exposed Dentine
One of the most promising aspects of the Nottingham gel, and one that has received surprisingly little attention in coverage of the research, is its ability to work on exposed dentine, not just enamel. Dentine is the softer, more porous tissue that lies beneath the enamel layer. When enamel wears thin or gums recede, dentine becomes exposed, leading to the sharp, shooting pain of tooth sensitivity that affects an estimated one in three adults worldwide.
The research team found that applying the gel directly to exposed dentine stimulates the growth of an enamel-like mineral layer on top of the dentine surface. This could provide a biological solution to dentine hypersensitivity, a condition currently managed with desensitizing toothpastes, fluoride varnishes, or, in severe cases, gum grafting surgery. The gel’s dentine-bonding properties may also improve the durability of dental restorations such as fillings and crowns by creating a stronger, more integrated interface between the restoration material and the natural tooth.
This dual functionality, enamel regeneration and dentine protection, broadens the potential patient population considerably, from children with early-stage decay to older adults with receding gums and chronic sensitivity.
Frequently Asked Questions
Does tooth repair gel really work?
Based on the laboratory evidence published in Nature Communications, yes, under controlled conditions on extracted human teeth, the Nottingham gel demonstrably regenerated organized enamel crystals that matched the structure and mechanical properties of natural enamel. The regenerated tissue withstood simulated brushing, chewing, and acid exposure. However, human clinical trials have not yet been completed, so real-world effectiveness in living patients remains to be confirmed.
Can tooth enamel be regrown naturally?
No. Tooth enamel contains no living cells, meaning the body has no biological mechanism to replace enamel once it is lost. This is why the Nottingham gel represents such a significant advance; it provides an external scaffold that enables enamel regeneration through a process the body cannot perform on its own. Some very early-stage demineralization (white spot lesions) can be partially reversed through fluoride treatment and improved oral hygiene, but fully lost enamel cannot regrow without intervention. Researchers have also explored unconventional regenerative materials, including a plant-based powder from Peru that has demonstrated the ability to regenerate decayed tooth tissue in early studies.
Do remineralizing gels work?
Existing remineralizing gels, including those containing fluoride, hydroxyapatite, or CPP-ACP, can help restore minerals to the surface layer of enamel and slow or reverse very early decay. However, they work by depositing minerals onto the enamel surface and cannot regenerate the organized, prismatic crystalline architecture of natural enamel in the way the Nottingham gel has demonstrated. The distinction is between surface remineralization (which current products offer) and structural regeneration (which the new gel achieves).
What is best for rebuilding enamel right now?
Currently, the best available approaches for addressing enamel loss depend on the severity. For early-stage demineralization, fluoride varnishes applied by a dentist combined with hydroxyapatite or high-fluoride toothpaste at home can slow or partially reverse mineral loss. For moderate enamel erosion, treatments like CPP-ACP (GC Tooth Mousse) can provide additional mineral delivery. For significant enamel loss or cavities, restorative treatments such as fillings, inlays, or crowns remain the only reliable option. Researchers have explored alternative approaches, including a tooth-strengthening candy that uses genetically engineered peptides to rebuild enamel, but these remain experimental. The Nottingham gel, once approved, would fill the gap between prevention and restoration by offering true regeneration of early enamel damage.
Is the Nottingham enamel gel safe?
The research team has described the gel as biocompatible and safe, and it contains no fluoride or toxic components. It is protein-based and designed to work with the body’s natural salivary minerals. However, formal safety data from human clinical trials, which begin in 2026, will be necessary before health authorities can certify the gel for widespread clinical use. The gel’s development team has emphasized that it was designed with both clinician and patient safety in mind from the outset.
The Road Ahead for Regenerative Dentistry
The Nottingham enamel regeneration gel represents more than just a new dental product. It signals the arrival of truly regenerative dentistry, a shift from drilling and filling damaged teeth, building on earlier technologies that stimulate teeth to repair themselves, toward to guiding the body’s own chemistry to rebuild what has been lost. If clinical trials confirm the laboratory findings, a simple, five-minute gel application could one day be as routine as a fluoride treatment, preventing countless cavities and sparing millions of patients from the drill. Combined with other advances in smart oral care and microbiome science, the next decade of dentistry looks markedly different from the last.
The technology is not a cure-all. It cannot fill deep cavities or replace crowns. But for the vast number of people with early enamel erosion, white spot lesions, and dentine hypersensitivity, it offers something no current treatment can: the chance to regrow what was thought to be irreplaceable.
