Can Cavities Heal Without Drilling? What the Evidence Really Shows (2026)

Evidence review updated: October 18, 2026

A dental check-up reveals a cavity. The dentist recommends a filling, but you have heard that teeth can repair themselves. Could fluoride, minerals, dietary changes or newer dental treatments stop the decay without drilling?

Sometimes, yes. Early tooth decay can often be arrested or reversed before a physical hole develops. Even certain established cavities can be managed without conventional drilling in carefully selected circumstances. However, the treatment depends on how far the decay has progressed, where it is located and whether the tooth remains structurally sound.

The important distinction is between remineralizing weakened enamel, arresting active decay and repairing a tooth that has physically lost tissue. These are three different outcomes, and research supporting one does not automatically prove the others.

This guide examines the evidence for fluoride, silver diamine fluoride, hydroxyapatite toothpaste, self-assembling peptides, diet, ozone and experimental tooth-regrowth research. It also explains which claims remain unproven and when professional treatment is necessary.

The central finding: You do not automatically need a filling for every early caries lesion. But a home remedy cannot reliably rebuild a large hole, eliminate a deep dental infection or replace a root canal when the pulp is irreversibly damaged. Arrange a dental assessment before deciding that a cavity can be left untreated.

In this article

• Key findings at a glance
• How tooth decay develops
• Which cavities can heal without drilling?
• Fluoride and enamel remineralization
• Silver diamine fluoride: the no-drill treatment
• Hydroxyapatite toothpaste
• P11-4 and guided enamel repair
• Diet, sugar and mineral supplements
• Ozone, chlorine dioxide and DMSO
• Can scientists grow new human teeth?
• What to ask your dentist
• An evidence-based home-care plan
• When dental care is urgent
• Frequently asked questions
• References and further reading

1. Key findings at a glance

Approach	What the evidence supports	Can it replace a filling?
Fluoride toothpaste and professional fluoride	Established methods for preventing decay and helping early, non-cavitated lesions remineralize or arrest.	Sometimes, if the lesion is early and suitable for non-restorative management.
Silver diamine fluoride (SDF)	Clinical evidence supports arresting selected active cavities, including cavitated decay in primary teeth.	In selected cases. The tooth may still need restoration or monitoring because SDF does not rebuild missing tooth structure.
Hydroxyapatite toothpaste	Clinical studies and a systematic review suggest potential benefits for caries prevention and remineralization.	Potentially useful for early lesions, but it is not a dependable way to rebuild a large cavity. Evidence is less established than the conventional fluoride evidence base.
P11-4 self-assembling peptide	Promising research for initial, non-cavitated lesions; clinical evidence has important limitations.	May help manage selected early lesions under professional care. Not a substitute for treating a deep or structurally destructive cavity.
Dietary sugar reduction	Strong evidence supports reducing free-sugar exposure to lower caries risk.	It helps control the disease process but cannot reliably repair a hole that has already formed.
Ozone treatment	Research has not established sufficiently certain benefits to recommend ozone as a routine cavity treatment.	Not a proven replacement for standard care.
Chlorine dioxide plus DMSO	No reliable clinical evidence establishes this as a safe, effective method for healing cavities or rescuing infected teeth.	No. Do not use a DIY chemical protocol as a substitute for dental treatment.
Experimental tooth-regrowth drugs	Investigational research is exploring biological pathways involved in tooth development.	No currently established, generally available drug can be relied on to regrow a tooth or repair an ordinary cavity.

These distinctions reflect the evidence discussed in the US National Institute of Dental and Craniofacial Research (NIDCR) guide to tooth decay, the American Dental Association's caries-management guidelines and the WHO's 2026 guidance on minimally invasive dental care.

2. How tooth decay develops: can teeth really heal?

Teeth are living structures, but their different tissues have different capacities for repair.

Photos courtesy of the Price-Pottenger Nutrition Foundation, who owns the copyrights. All rights reserved.

Enamel, the hard outer layer of a tooth, is predominantly mineral and does not contain living cells capable of regenerating it like skin. Beneath enamel lies dentin, which has a different structure and can respond to injury. Deeper still, the dental pulp contains nerves, blood vessels and cells involved in maintaining the tooth and forming dentin.

Understanding this anatomy explains both the promise and the limitations of non-drilling treatments.

The natural demineralization–remineralization cycle

Dental plaque contains microorganisms that use fermentable carbohydrates, including sugars, to produce acids. These acids lower the pH around the tooth and cause minerals to leave the enamel. This process is called demineralization.

Saliva helps neutralize acids and supplies calcium and phosphate that can be incorporated back into weakened enamel. Fluoride also helps enamel resist acid attacks and supports the formation of more acid-resistant mineral.

When these protective processes keep pace with mineral loss, the enamel may remain intact. When mineral loss repeatedly exceeds repair, the lesion can grow until the surface breaks down and a cavity forms.

The process is dynamic: a lesion can become more active, slow down or stop progressing. That is the scientific basis for preventive and non-restorative treatment.

What does the word “healing” mean in dentistry?

• Remineralization: Minerals are returned to weakened enamel, improving its condition without necessarily restoring every original microscopic feature.
• Arrest: A caries lesion becomes inactive or stops progressing. The damaged area may remain visibly altered.
• Restoration: Material is used to replace or rebuild tooth structure lost through decay or trauma.
• Pulp treatment: When the inner tissue is seriously affected, treatment may be required to manage pulp disease and preserve or remove the tooth as appropriate.

An inactive cavity is not necessarily a cavity that has disappeared. Dark staining, roughness or a physical defect can remain even when the decay has been arrested.

The NIDCR explains that early decay can sometimes be stopped or reversed, but once mineral loss causes the enamel to break down, the tooth may need a filling or another restorative treatment. Read the full NIDCR explanation.

3. Which cavities can heal without drilling?

The most important question is not whether teeth can remineralize. They can. The question is whether the particular lesion can be managed safely without restoring the missing structure.

Lesion or condition	Typical features	Possible treatment approach
Initial enamel lesion	A chalky white spot or early mineral loss with an intact surface.	Fluoride, plaque control, reduction in sugar exposure and monitoring may reverse or arrest the lesion.
Early lesion between teeth	Mineral changes may be visible on dental X-rays even when no hole is apparent.	Depending on depth and risk, the dentist may consider remineralization, monitoring, sealing or selected minimally invasive procedures.
Small or moderate cavity	The tooth surface has broken down, creating a physical defect.	Selected lesions may be arrested with professional treatment, including SDF. A restoration may still be needed to restore form, cleanability and function.
Deep cavity near the pulp	Extensive decay approaches the nerve and blood supply inside the tooth.	Prompt assessment is important. Depending on pulp status, treatment may involve selective decay removal, a restoration or pulp therapy.
Dental abscess or spreading infection	Pain, swelling, pus, fever or other signs of infection may occur.	Urgent professional treatment. Home remineralization methods are not appropriate substitutes.

These are general categories, not a diagnosis. Dentists use examination findings, lesion activity, X-rays when indicated, pulp assessment and a person's overall risk to decide what treatment is appropriate.

A crucial point: The absence of pain does not prove that a cavity is shallow or inactive. Early caries often causes no symptoms, and deeper disease may progress before noticeable pain develops.

Does every cavity need the drill?

No. Modern caries management is broader than automatically drilling every visible lesion. The appropriate options can include fluoride, sealants, silver diamine fluoride, selective removal of decayed tissue and other minimally invasive techniques.

However, the opposite claim—that fillings are usually unnecessary because teeth heal themselves—is also inaccurate. A large structural defect may need restoration even when the active disease process has been controlled.

The ADA's clinical practice guidelines distinguish non-restorative approaches from restorative treatments and recommend treatment according to lesion type and clinical circumstances.

4. Fluoride: the established approach to early remineralization

Fluoride is one of the best-established tools for preventing dental caries and supporting the remineralization of early enamel lesions.

It works locally in the mouth. Fluoride retained in plaque and saliva helps enamel resist acid dissolution and supports mineral repair when calcium and phosphate are available. It also makes the mineral that reforms on the tooth more resistant to subsequent acid attack.

What fluoride can do

• Reduce the risk of new cavities.
• Help reverse or arrest selected early lesions before cavitation.
• Support management of people at increased risk of tooth decay.
• Serve as part of a broader prevention plan that includes oral hygiene, diet and professional monitoring.

What fluoride cannot do

Fluoride toothpaste does not reliably reconstruct a large hole in enamel or dentin. Nor does it eliminate the need to assess a tooth with deep decay, pulp involvement or an abscess.

How to use fluoride toothpaste

• Brush twice daily for approximately two minutes with an age-appropriate fluoride toothpaste.
• Clean between the teeth daily with floss or another suitable interdental cleaner.
• Spit out toothpaste after brushing rather than swallowing it.
• For children, use an age-appropriate amount and supervise brushing to reduce swallowing.
• Ask a dentist whether professional fluoride varnish or prescription-strength products are appropriate if you have recurrent cavities or other high-risk features.

The ADA provides practical guidance on fluoride toothpaste, rinses and professionally applied fluoride.

5. Silver diamine fluoride: a clinically supported no-drill option

Silver diamine fluoride (SDF) is a professionally applied liquid used to help arrest active dental caries in selected circumstances. It is particularly useful in some patients who find conventional treatment difficult, including young children, people with certain disabilities and patients who need an interim approach while more comprehensive care is arranged.

SDF is an important example of why the choice is not simply “drilling or doing nothing.” It can help stop disease progression without requiring the dentist to remove the decayed tissue in the same manner as a conventional filling procedure.

What does the latest clinical evidence show?

A multicentre, randomized, blinded, placebo-controlled Phase III trial published in JAMA Pediatrics in 2026 enrolled 830 children aged 12 to 71 months with severe early childhood caries. It compared 38% SDF with placebo for arresting active cavities in primary teeth.

In the intention-to-treat analysis, the proportion of lesions classified as arrested at six months was 54.0% with SDF, compared with 22.5% with placebo. Results also favored SDF at three months and after the second application. Approximately 70% of enrolled children completed the study, an important limitation to consider when interpreting the findings.

These results strengthen the clinical evidence that SDF can arrest cavitated decay in young children's primary teeth. They do not mean that it heals every cavity, works equally well in every population or reconstructs lost tooth structure.

Read the primary study: Fontana et al., Efficacy of Silver Diamine Fluoride on Young Children With Severe Early Childhood Caries, 2026.

Advantages and limitations of SDF

Potential advantage	Limitation or consideration
Quick application without conventional drilling or local anesthetic for the SDF application itself.	Not every lesion is suitable, and the tooth may need further treatment.
Can arrest selected active cavities.	Effectiveness varies, and follow-up is necessary.
May be useful when conventional treatment is difficult or must be deferred.	It does not restore the original shape or strength of missing tooth structure.
Can form part of a minimally invasive caries-management plan.	The treated decayed area usually becomes dark or black, which may be undesirable in visible areas.

Does SDF mean fillings are obsolete?

No. SDF can arrest decay, but it does not function like a filling that rebuilds a broken tooth. A dentist may recommend continued monitoring, sealing or a restoration to address food trapping, structural weakness or functional problems.

It is also important to distinguish the arrest of decay from the treatment of advanced pulp disease. A tooth with severe pain, a damaged pulp or spreading infection needs a proper assessment rather than an assumption that an antibacterial liquid will solve the problem.

For clinical recommendations, see the ADA's silver diamine fluoride guidance and its non-restorative caries treatment guideline.

6. Hydroxyapatite toothpaste: can the enamel mineral rebuild teeth?

Hydroxyapatite is a calcium-phosphate mineral that is a major component of tooth enamel. Toothpastes containing synthetic hydroxyapatite are designed to support the surface of the tooth and may help address early mineral loss.

The biological rationale is plausible: supplying a mineral similar to one naturally found in enamel may help improve the surface and support remineralization under suitable conditions.

What does the research say?

A systematic review and meta-analysis published in the Journal of Dentistry in December 2024 examined clinical evidence for caries prevention by hydroxyapatite in oral-care products. The review included randomized trials and other clinical evidence and reported findings consistent with a potential preventive benefit.

That is encouraging, but several distinctions matter:

• Evidence that a toothpaste may prevent new cavities does not necessarily establish that it will reverse every existing lesion.
• Evidence from a particular formulation and study population cannot automatically be applied to every hydroxyapatite product.
• A toothpaste that supports remineralization does not physically replace a large amount of enamel or dentin already lost.
• Hydroxyapatite has not displaced fluoride as the established standard recommendation in major US dental guidance for most people.

For the original evidence review, see Clinical evidence of caries prevention by hydroxyapatite: An updated systematic review and meta-analysis (2024).

Should you switch from fluoride to hydroxyapatite?

That decision depends on your caries risk, oral-health history and the evidence supporting the specific product. Fluoride toothpaste remains the better-established starting point for most people.

If you prefer hydroxyapatite toothpaste, discuss the options with your dentist, especially if you have frequent cavities, exposed root surfaces, dry mouth or a history of extensive restorative treatment. Do not assume that a product containing hydroxyapatite has been shown to treat a deep or cavitated lesion.

Practical takeaway: Hydroxyapatite is a promising oral-care ingredient, but claims that it can rebuild teeth completely or eliminate the need for dental treatment go beyond the evidence.

7. P11-4: a peptide designed to support early enamel repair

Self-assembling peptide P11-4 is a material designed to support the mineralization of early caries lesions. Products based on this technology, including Curodont Repair, are used in professional dental settings in some markets.

The concept differs from simply applying a mineral-containing toothpaste. The peptide is intended to form a scaffold within an initial lesion, helping create conditions that support mineral deposition from the surrounding oral environment.

What does the clinical evidence show?

A 2023 systematic review and meta-analysis in the Journal of the American Dental Association examined six clinical trials involving P11-4 products for initial caries lesions.

The review found evidence suggesting a clinically meaningful increase in caries arrest and a reduction in lesion size with Curodont Repair. However, all included trials had elevated risks of bias, and the authors called for longer studies. The review also noted that no studies of one of the newer products, Curodont Repair Fluoride Plus, met the inclusion criteria at that time.

Read the review: Systematic review and meta-analysis on the effect of self-assembling peptide P11-4 on initial caries lesions (2023).

Who might benefit?

P11-4 may be worth discussing with a dentist when an initial lesion is still suitable for non-invasive treatment. Its suitability depends on the lesion's depth, surface condition, activity and the patient's overall risk.

It should not be presented as a proven way to regrow a substantial piece of missing enamel, refill a deep hole or cure an abscess. Nor should early positive trials be interpreted as proof that the procedure works equally well for all cavities.

Access, professional protocols, local regulatory status and costs can also vary. Ask the treating dentist to explain the expected benefit for your specific lesion and what follow-up will be required.

8. Diet, sugar and mineral supplements: what matters most?

Diet influences the balance between demineralization and remineralization. However, nutrition should be viewed as part of caries prevention and disease management—not as a guaranteed way to repair an established cavity.

Reduce the amount and frequency of free sugars

Free sugars are an important dietary risk factor for tooth decay. Repeated sugar exposure can lead to repeated acid attacks, giving enamel less opportunity to recover between them.

The World Health Organization recommends keeping free sugars below 10% of total daily energy intake and suggests that reducing them below 5% may provide additional benefits.

Practical strategies include:

• Reduce sugary drinks, sweets and frequent sugary snacks.
• Choose water rather than repeatedly sipping sweetened beverages throughout the day.
• Limit the frequency of between-meal sugar exposures.
• Avoid sugary drinks and snacks after brushing at night.
• Choose a balanced dietary pattern rather than relying on isolated foods or supplements to prevent cavities.

See the WHO's 2025 technical note on sugars and dental caries.

Do you need to eliminate all carbohydrates?

No. Evidence supporting the reduction of free sugars does not demonstrate that every carbohydrate-containing food is harmful to teeth or that a zero-carbohydrate diet is necessary for dental health.

Whole dietary patterns, oral hygiene, saliva, fluoride exposure and individual caries risk all matter. The sensible goal is to reduce frequent exposure to free sugars and maintain a sustainable, balanced diet.

Can calcium, vitamin D or vitamin K heal cavities?

Calcium and phosphate are important components of tooth mineral, while nutritional deficiencies can affect general health. Correcting a genuine deficiency is appropriate for overall health, but that does not establish that supplementing above normal nutritional needs will regenerate a cavity.

The evidence does not justify claiming that calcium orotate, fat-soluble vitamins, bone broth or a proprietary supplement protocol can reliably fill existing holes in teeth.

There is also insufficient clinical evidence to conclude that mineral supplements alone can reliably arrest established cavities or reverse deep decay. The appropriate treatment should be based on clinical assessment rather than testimonials about a tooth appearing whiter or harder.

9. Ozone, chlorine dioxide and DMSO: separate laboratory effects from clinical proof

Several alternative dental approaches are promoted because they have plausible antibacterial or chemical mechanisms. The key question is whether they have been shown to produce meaningful clinical benefits in people—and whether they are safe for the intended use.

Ozone therapy

Ozone has antimicrobial properties, and dental researchers have examined its use in caries management. However, killing microorganisms in a laboratory or reducing bacterial counts does not prove that a treatment reliably arrests cavities or improves long-term outcomes.

A systematic review and meta-analysis published in 2020 identified 12 randomized clinical trials of ozone therapy for dental caries. The authors judged the evidence to be of very low certainty because of small studies, methodological concerns and imprecise results. They concluded that the available evidence was insufficient to recommend ozone for routine caries treatment.

Read the review: Effectiveness and Safety of Ozone Therapy in Dental Caries Treatment: Systematic Review and Meta-analysis.

Ozone should therefore not be presented as an established substitute for fluoride, SDF, sealants or appropriate restorative treatment. Patients considering an ozone-based procedure should ask about the clinical evidence, expected benefits, risks, costs and established alternatives.

Chlorine dioxide and DMSO

Some online accounts describe applying chlorine dioxide solutions, sometimes combined with dimethyl sulfoxide (DMSO), to painful or decayed teeth. These reports are not equivalent to controlled clinical trials demonstrating that the protocol can reverse cavities, sterilize deep dentin safely or save teeth that otherwise need pulp treatment.

Safety warning: Do not prepare or apply a DIY chlorine-dioxide/MMS solution or a chlorine-dioxide/DMSO mixture to a cavity. Chlorine dioxide is a powerful oxidizing chemical, and products sold as Miracle Mineral Solution (MMS), sodium chlorite or similar preparations can cause serious harm. DMSO can also alter the absorption of substances to which it is applied. Neither a chemical's antimicrobial activity nor its use in industrial water treatment establishes that it is safe or effective as a dental treatment.

The US Food and Drug Administration has warned consumers not to use MMS and related products, reporting potentially severe effects from these preparations. See the FDA's warning and enforcement information about MMS.

Commercial oral rinses that contain particular stabilized chlorine-dioxide formulations should not be confused with DIY concentrated solutions. In any case, evidence that a mouthwash reduces plaque, odor or bacterial counts does not demonstrate that it can reconstruct a cavity or treat an infected tooth.

Bottom line: There is no reliable clinical basis for recommending chlorine dioxide plus DMSO as a cavity-healing protocol. Do not use a testimonial as a reason to postpone assessment of a painful or potentially infected tooth.

10. Can scientists grow new human teeth?

Regenerating a new tooth is different from remineralizing enamel or arresting decay. It would require the coordinated development of complex structures, not just the deposition of mineral on a damaged surface.

One research area focuses on USAG-1, a protein involved in signaling pathways that regulate tooth development. Researchers have investigated antibodies targeting this pathway, including in animal models.

What has been demonstrated?

A 2021 study from Kyoto University and the University of Fukui reported that an antibody targeting USAG-1 could stimulate tooth development in mice with tooth agenesis, a congenital condition in which teeth are absent. Related experiments also examined tooth development in ferrets.

These animal findings offered a possible path toward regenerative dentistry, but they did not demonstrate that a drug could regrow teeth safely and reliably in humans.

Read the research summary from Kyoto University: New drug to regenerate lost teeth.

What is the status of TRG-035 in 2026?

Toregem BioPharma is developing TRG-035, an investigational antibody-based treatment related to this research. On August 17, 2026, the company announced completion of the required Japanese regulatory review of its clinical-trial notification for an exploratory Phase IIa trial targeting congenital tooth agenesis.

This is a development milestone, not proof that the drug works in humans or that it is available as a treatment. The program is focused on congenital tooth agenesis, and the possibility of eventually treating other types of tooth loss is a separate research question.

For the latest company announcements, consult Toregem BioPharma's official news page.

Could tooth-regrowth drugs replace fillings, root canals or implants?

Not at present. These are different clinical problems:

• Early enamel decay: may be reversed or arrested through remineralization and non-invasive caries management.
• Established caries: may require arrest, sealing or restoration depending on the amount of missing structure.
• Advanced pulp disease: may require pulp treatment, root canal treatment or extraction, depending on the diagnosis.
• Missing teeth or congenital tooth agenesis: may one day benefit from regenerative approaches, if clinical trials demonstrate safety and effectiveness.

A drug intended to influence tooth development should not be advertised as a current treatment for ordinary cavities. Claims of general availability around a particular year should be treated as projections unless supported by regulatory authorization and human clinical evidence.

11. Are dentists suppressing treatments that avoid drilling?

Claims that dentistry deliberately buried effective cavity treatments because fillings are profitable require strong evidence. The existence of financial incentives in healthcare does not, on its own, establish that a profession or industry coordinated to suppress an effective treatment.

There is a more straightforward explanation for why different treatments coexist: they address different stages of disease, have different levels of evidence, and may offer different trade-offs in effectiveness, durability, appearance, practicality and cost.

For example, SDF is useful for arresting selected lesions but commonly turns the affected area black. A conventional filling can restore missing tooth structure and function. A treatment that works well in an initial enamel lesion may be inadequate for a deep cavity that compromises the tooth.

Modern dental guidelines recognize prevention, non-restorative care and conservative restorative techniques. The WHO's 2026 guidance discusses fluoride varnish, SDF, sealants and restorative materials in the context of less invasive and evidence-based caries management.

Read the WHO guideline on environmentally friendly and less invasive oral healthcare for preventing and managing dental caries.

The better question is not whether dentists are trying to protect the filling industry. It is whether the proposed treatment is appropriate for your particular lesion, whether the evidence is convincing and whether the treatment plan has clearly explained its benefits, limitations and alternatives.

12. What to ask your dentist before agreeing to drilling

If you have been told you need a filling, it is reasonable to ask for a clear explanation of the diagnosis and the alternatives. This is especially important when the lesion is early, you have no symptoms or the recommended treatment is extensive.

1. Is the lesion non-cavitated or is there already a hole? Ask the dentist to explain the clinical or X-ray findings supporting the diagnosis.
2. Is the lesion active or arrested? Ask how its activity was assessed and what risk factors could make it progress.
3. Can it be managed without a conventional filling? Depending on the lesion, ask about fluoride varnish, sealants, SDF or another appropriate minimally invasive option.
4. What happens if I monitor it? Ask about the risk of progression, the follow-up interval and the signs that would lead to a change in treatment.
5. If restoration is necessary, can healthy tooth structure be preserved? Ask whether selective caries removal or another conservative approach is appropriate.
6. Is the pulp healthy? For deep lesions or painful teeth, ask whether the tooth needs further assessment for pulp involvement.
7. What will this treatment restore? Clarify whether the goal is to remineralize enamel, stop lesion progression, repair missing structure or manage an infection.

A dentist who recommends a filling should be able to explain why it is appropriate. Likewise, a dentist offering a no-drill treatment should be able to explain its evidence, limitations, follow-up requirements and what happens if it fails.

For a large or complex treatment plan, a second opinion from another appropriately qualified dentist may help you compare the options.

13. An evidence-based home-care plan to prevent further decay

A practical plan does not require an elaborate supplement regimen or an unvalidated chemical protocol. It begins with established prevention measures and adds professional care according to individual risk.

Every morning

• Brush for two minutes using an appropriate fluoride toothpaste, unless your dentist has advised a different regimen.
• Use a soft toothbrush and clean all tooth surfaces carefully, including along the gumline.
• Choose water instead of frequently sipping sweetened drinks.

Throughout the day

• Reduce the frequency and amount of free-sugar exposure.
• Clean between teeth daily with floss or an appropriate interdental cleaner.
• Follow any individualized recommendations for dry mouth, gum recession or recurrent cavities.
• Avoid assuming that a white spot or a lack of pain means decay has stopped.

Every evening

• Brush for two minutes with fluoride toothpaste before bed.
• After brushing, spit out the toothpaste rather than swallowing it.
• Avoid further sugary food or drinks after brushing.
• Do not put aspirin, concentrated chemicals or unvalidated mixtures directly onto a painful tooth or gum.

During dental follow-up

• Ask whether the current lesion needs active treatment or can be monitored under a preventive plan.
• Use professionally recommended fluoride, sealants or SDF where appropriate.
• Follow the review schedule based on your cavity risk and the treatment used.
• Seek reassessment if a lesion changes, symptoms develop or the agreed treatment does not appear to be working.

People with recurrent cavities, significant dry mouth, exposed root surfaces or extensive dental restorations may need a more intensive prevention plan. A dentist can tailor that plan to the causes of the individual's disease.

14. When a cavity needs urgent attention

Do not attempt to manage a potentially serious dental infection with toothpaste, supplements or alternative chemical treatments alone.

• Arrange prompt dental assessment for persistent toothache, new or worsening sensitivity, a broken tooth, a visible cavity or pain when biting.
• Seek urgent dental care if you have severe or increasing pain, pus, gum swelling or swelling around the jaw.
• Seek emergency medical care immediately for difficulty breathing or swallowing, rapidly spreading facial or neck swelling, or other signs of a serious spreading infection.

Fever, facial swelling and significant pain can accompany a dental abscess. The absence of these symptoms does not rule out advanced decay, so a suspected cavity should still be assessed even when it does not hurt.

See the NIDCR's information on tooth decay, diagnosis and treatment.

15. Frequently asked questions

Can cavities heal naturally without a filling?

Early, non-cavitated lesions can sometimes remineralize or become inactive with appropriate care. Once a physical hole has formed, the outcome depends on the lesion's characteristics. Some cavities can be arrested without drilling, including selected cases treated with SDF, but a defect may remain and still require restoration.

Can a cavity disappear with fluoride toothpaste?

Fluoride toothpaste can help remineralize and reverse selected early lesions. It does not reliably fill a large hole or repair advanced structural damage. A dentist can determine whether an apparently early lesion is suitable for non-restorative treatment.

Can hydroxyapatite toothpaste regrow enamel?

Clinical evidence suggests that hydroxyapatite toothpaste may help prevent caries and support remineralization. The term “regrow” can be misleading: evidence of surface mineral improvement does not mean that a large amount of missing enamel or dentin can be reconstructed.

Can silver diamine fluoride stop an existing cavity?

Yes, it can arrest selected active cavities, including cavitated decay in primary teeth. It requires professional assessment and follow-up, and the treated decayed area usually becomes dark. SDF may stop progression without restoring the tooth's original shape.

Can I use silver diamine fluoride instead of a filling?

Sometimes, depending on the tooth, the lesion and the patient's circumstances. The dentist must determine whether arresting decay alone is sufficient or whether restoration is necessary to maintain strength, function and cleanability.

Can vitamin D, vitamin K2 or calcium supplements reverse cavities?

Correcting nutritional deficiencies may be appropriate for general health, but there is not reliable clinical evidence that these supplements alone can reverse established cavities. They should not replace effective oral hygiene, caries prevention or indicated dental treatment.

Does ozone therapy heal cavities?

Current evidence is insufficient to recommend ozone as a routine treatment for dental caries. Antimicrobial activity and small clinical studies do not establish that ozone reliably arrests cavities or replaces established treatments.

Is chlorine dioxide mixed with DMSO a proven cavity cure?

No. There is no reliable clinical evidence establishing this as a safe, effective cavity treatment. DIY preparations can be hazardous and may delay treatment of a serious dental problem.

Can a tooth grow back after extraction?

Not through an established routine drug treatment at present. Investigational research into pathways such as USAG-1 is exploring tooth development, but human efficacy and general availability have not been established. Tooth-regeneration research is separate from the use of fluoride or other methods to manage early decay.

Does every cavity eventually need a root canal?

No. Many cavities can be managed without root canal treatment. A root canal may be necessary when the pulp is irreversibly damaged or infected, depending on the clinical findings. The earlier a problem is assessed, the more treatment options may be available.

Should I delay a recommended filling to try natural remedies first?

Do not postpone necessary treatment based on testimonials or unproven remedies. Ask your dentist whether the lesion is suitable for monitoring, remineralization, SDF or other conservative approaches. If you are uncertain about an extensive treatment plan, seek a second professional opinion rather than leaving the problem untreated.

16. The bottom line: preserve teeth with evidence, not promises

Teeth can participate in a genuine repair process. Saliva, fluoride and appropriate changes in oral conditions can help early enamel lesions regain mineral or stop progressing. Modern dental care also includes non-restorative and minimally invasive approaches that can avoid conventional drilling in selected cases.

The evidence supports several important conclusions:

• Early prevention matters: fluoride toothpaste, effective cleaning and lower free-sugar exposure can reduce caries risk and support the repair of early lesions.
• No-drill treatment is real: SDF and other professionally selected approaches can manage certain lesions without conventional drilling.
• Emerging treatments are promising but not interchangeable: hydroxyapatite and P11-4 have supportive evidence for selected applications, but their results should not be extrapolated to every type of cavity.
• Not every cavity can be rebuilt biologically: arresting decay does not necessarily restore missing structure, and deep disease or infection can require more substantial care.
• Experimental does not mean available: tooth-regeneration drugs remain investigational and should not be portrayed as an established cure for ordinary dental decay.

The best alternative to unnecessary drilling is not simply to avoid the dentist. It is to identify caries early, understand the condition of the tooth, use evidence-based preventive or minimally invasive treatment where appropriate, and restore the tooth when necessary.

One final question worth asking: “Can this particular lesion be arrested safely without a filling, and how will we know whether that treatment has worked?” A good answer should explain the diagnosis, the available options, the limits of each option and the follow-up plan.

17. References and further reading

The following sources provide the clinical guidance and research discussed in this review.

1. National Institute of Dental and Craniofacial Research. Tooth Decay. A patient-oriented overview of how caries develops, early remineralization, symptoms, diagnosis and treatment.
2. World Health Organization. (2026). WHO guideline on environmentally friendly and less invasive oral health care for preventing and managing dental caries. Guidance on less invasive treatment options, dental materials and evidence-informed caries management.
3. American Dental Association. Evidence-Based Clinical Practice Guideline on Nonrestorative Treatments for Caries Lesions. Clinical recommendations for non-restorative treatment options based on lesion type and location.
4. American Dental Association. Evidence-Based Clinical Practice Guideline on Restorative Treatments for Caries Lesions (2023). Evidence-based recommendations for restorative materials and caries removal approaches.
5. Fontana M, Moursi A, Gonzalez-Cabezas C, et al. (2026). Efficacy of Silver Diamine Fluoride on Young Children With Severe Early Childhood Caries: A Randomized Clinical Trial. JAMA Pediatrics. Randomized Phase III trial of 38% SDF versus placebo in young children with severe early childhood caries.
6. Pawinska M, Paszynska E, Amaechi BT, et al. (2024). Clinical evidence of caries prevention by hydroxyapatite: An updated systematic review and meta-analysis. Journal of Dentistry. Review of clinical evidence for hydroxyapatite-containing oral-care products.
7. Keeper JH, Kibbe LJ, Thakkar-Samtani M, et al. (2023). Systematic review and meta-analysis on the effect of self-assembling peptide P11-4 on arrest, cavitation, and progression of initial caries lesions. Journal of the American Dental Association, 154(7), 580–591.e11. Systematic review evaluating the P11-4 approach for initial lesions.
8. Cabrera-López A, et al. (2020). Effectiveness and Safety of Ozone Therapy in Dental Caries Treatment: Systematic Review and Meta-analysis. Review finding insufficient high-certainty evidence to recommend ozone for routine treatment of caries.
9. World Health Organization. (2025). Sugars and dental caries: WHO technical note. Evidence and public-health recommendations concerning free sugars and caries risk.
10. Kyoto University. (2021). New drug to regenerate lost teeth. Research summary describing early animal research into USAG-1 inhibition and tooth development.
11. Toregem BioPharma. Official company news and research-development updates. Company announcements concerning its investigational tooth-regeneration program.
12. US Food and Drug Administration. FDA warning and enforcement information concerning Miracle Mineral Solution. Safety information relevant to claims involving chlorine-dioxide/MMS products.
13. Dr Robert Yoho. (2026). Healing cavities without the drill. Teeth heal like any other tissue, but dentists drill anyway.

Medical disclaimer: This article is for general educational purposes and is not a diagnosis or individualized dental treatment plan. Dental caries can progress without pain. Have suspected cavities assessed by a qualified dental professional, and do not delay recommended treatment for a deep cavity, pulp disease or suspected infection. Treatment availability, regulatory status and recommendations may differ between countries.