Reviewed 31 August 2026. This page is built from one network meta-analysis of 70 randomised trials, a second network meta-analysis of 68 trials, three Cochrane-adjacent syntheses, five randomised trials, one real-world study of 7,299 teeth and a pharmacodynamic dose–response trial — every record listed at the end with its PMID, and every number quoted from the published abstract. Written for people staring at a white mark in the mirror and for clinicians writing the note. Not medical advice.
The short answers
- A flat, chalky, opaque white patch that does not wipe off is usually one of two things: an initial (non-cavitated) carious lesion — subsurface demineralisation with the surface still intact — or a developmental enamel defect that has been there since the tooth formed. The chemistry behind the first one is not mysterious: below a critical pH the hydroxyapatite of enamel dissolves, and the rate depends on how long the pH stays down, on calcium-binding ligands and on the pellicle and biofilm covering the surface (Enax et al., Dent J (Basel) 2026-06-01, PMID 42345977).
- The good news is genuinely large for white spots, and it is quantified. In a network meta-analysis of 70 randomised trials with 4,634 participants looking at white spot lesions around fixed braces, several agents reduced lesion score with SMDs from −1.38 to −0.94 (self-assembling peptide, NovaMin, nano-agents, xylitol varnish, CPP-ACP; P-scores 0.71 to 0.86), and for lesion prevalence fluoride varnish, fluoride combinations and CPP-ACP ran OR 0.25 to 0.32. But note what failed: laser, chlorhexidine and fluoride mouthwash or toothpaste alone showed no significant effect, and no intervention reduced lesion size (Hussain et al., BMC Oral Health 2026-02-01, PMID 41723426).
- Head-to-head, over 24 months, infiltration did best in the one trial that compared four real strategies: the rate of change in lesion area was −56.66 ± 20.70 (95% CI −62.23 to −51.09) for resin infiltration versus −42.01 ± 18.12 (95% CI −46.28 to −37.75) for fluoride varnish, −45.27 ± 18.13 (95% CI −49.83 to −40.70) for CPP-ACP and −35.19 ± 25.79 (95% CI −40.99 to −29.38) for fluoride toothpaste alone; there was no difference in DMFT between groups, and the trial was small — 73 participants randomised, 57 completing across the four arms (Zhou et al., BMC Oral Health 2026-05-01, PMID 42218470).
- “Do I need a filling?” has a defensible answer for a lesion that is not cavitated: no, and the alternative has numbers. In a two-year real-world study of 7,299 teeth diagnosed with an occlusal non-cavitated lesion, 8.2% of unsealed teeth progressed to a restoration versus 3.0% of sealed ones (RR 0.37, 95% CI 0.16 to 0.88; p = 0.02) (Shah et al., Caries Res 2025-01-01, PMID 39154643).
- Where a cavity is already open, “no filling” is only safe with a real strategy behind it — and the strongest evidence is for children’s baby molars. A two-year randomised trial comparing three approaches in 116 children found clinical success of 93.8% for the Hall technique (preformed metal crown cemented without caries removal), 60.8% for conventional restoration and 42.5% for non-restorative cavity control; all three were well tolerated, conventional restoration took longer (Narbutaite et al., J Dent 2024-11-01, PMID 39374732). A network meta-analysis of 68 randomised trials on cavitated lesions in primary teeth (12,094 treatments at six months) put the Hall technique highest for success at six months (Sahebalam et al., BMC Oral Health 2025-09-01, PMID 41013342). An umbrella review of 49 systematic reviews (from 498 records) reached the same three winners for minimally invasive management in primary teeth: silver diamine fluoride, the Hall technique and resin infiltration (Padilla-Cáceres et al., Front Dent Med 2025-01-01, PMID 41602568).
- For permanent teeth, do not read those results as permission to leave a hole alone. The Cochrane review of interventions for treating cavitated or dentine lesions found moderate-certainty evidence that conventional restorations failed more than sealant-based or silver-based alternatives in permanent teeth (composite resin versus sealant + silver diamine fluoride: OR 2.06, 95% CI 1.34 to 3.17; 3 studies, 398 teeth) and that in deep lesions the network favoured sealing over conventional filling (Schwendicke et al., Cochrane Database Syst Rev 2021-07-01, PMID 34280957). But most comparisons in that review carried low or very low certainty, small samples and few failures. The honest summary: arrested is a legitimate state, ignored is not.
- If someone offers you silver diamine fluoride and argues about how long to paint it on, there is now a dose–response trial: in 665 children aged 3 to 4 years with 2,106 carious teeth and 3,024 active surfaces, nine randomised application times produced an estimated arrest rate rising from 75% at 4 seconds, to 80% at 16 seconds, to 84% at 60 seconds, with the Emax model fitting best and the gain flattening (0.1% per second at 30 s to 0.05% per second at 43 s) (Yan et al., J Dent Res 2025-12-01, PMID 40583169). Longer is not linearly better.
- What the evidence does not support: that any toothpaste can regrow a hole, that a white spot that has been there since the tooth erupted is a hygiene failure, or that “watching” a cavitated lesion without active plaque control works. In the 116-child trial above, non-restorative cavity control — which depends entirely on brushing and fluoride being done properly — succeeded in only 42.5% of cases (Narbutaite et al., J Dent 2024-11-01, PMID 39374732).
What a white spot is, in the chemistry that decides treatment
Enamel is a ceramic. Its hydroxyapatite crystals dissolve when the environment around them becomes acidic enough, and the process is governed less by “how acidic is my drink” than by how long the pH stays low, how much calcium and phosphate are already in the saliva, and what the protein pellicle and bacterial biofilm do to both diffusion and ion binding. A recent chemistry-focused review puts the two clinical consequences plainly: caries and erosion are both dissolution phenomena, low pH is decisive, but calcium-binding ligands (acid anions, proteins) pull the equilibrium further by removing calcium, and individual variation in saliva and microbiome makes the same habit produce very different teeth in different people (Enax et al., Dent J (Basel) 2026-06-01, PMID 42345977).
A white spot is what the body of that process looks like when it goes on long enough: mineral is lost from beneath a surface that is still largely intact, so the porous subsurface scatters light and looks chalky. Two properties follow, and both are the whole basis for treating it without a drill. First, the surface layer is still there, so the lesion is sealed from the outside and can be re-hardened from the inside if you change the chemistry and give it time. Second, there is no hole yet — nothing for a filling to bond into, and nothing that traps plaque the way an open cavity does. That is why “the lesion is not cavitated” is the single most important phrase in your notes, and why the trials below keep comparing preventive and micro-invasive options instead of restorations.
Which treatments actually move a white spot
The 2026 network meta-analysis is the best single picture available, precisely because it says what did not work. Seventy randomised trials, 4,634 participants, restricted to trials with labial fixed brackets to keep the network transitive, random-effects (REML) models, inconsistency checked by node-splitting, ranking by P-score, confidence rated with CINeMA (Hussain et al., BMC Oral Health 2026-02-01, PMID 41723426):
- For white spot score: self-assembling peptide, NovaMin, nano-agents, xylitol varnish and CPP-ACP had the highest efficacy, SMD −1.38 to −0.94 (P-scores 0.71 to 0.86). Probiotics, fluoride combinations and fluoride varnish also showed significant effects.
- For no effect: laser, chlorhexidine, and fluoride mouthwash or fluoride toothpaste alone did not show a significant effect on lesion score. That is a striking finding for the one thing almost every orthodontic clinic prescribes.
- For lesion prevalence: fluoride varnish, fluoride combinations and CPP-ACP were most effective (OR 0.25 to 0.32); resin infiltration and fluoride toothpaste also showed benefit.
- For lesion size: no intervention significantly reduced it.
- Quality: networks were generally sparse, clinical heterogeneity and moderate risk of bias limited the strength, no small-study effect for lesion score (Egger p = 0.45), and CINeMA ratings ranged from high to low (Hussain et al., BMC Oral Health 2026-02-01, PMID 41723426).
Then there is the trial that follows patients for two years rather than a semester. Seventy-three participants randomised into fluoride varnish, CPP-ACP, resin infiltration or fluoride toothpaste alone; at 24 months all four reduced lesions over time, infiltration was significantly better than varnish (change in lesion area −56.66 ± 20.70 versus −42.01 ± 18.12), CPP-ACP beat fluoride toothpaste alone, and DMFT did not differ between groups. Completion: 14, 17, 12 and 14 in the four arms (Zhou et al., BMC Oral Health 2026-05-01, PMID 42218470). Read the effect as “the white mark shrinks more”, not “the patient ends up with fewer cavities” — the trial could not show the second part, and with those numbers it was never going to.
On primary teeth, varnishes were reviewed separately: seven studies met inclusion criteria, and formulations with bioactive additives showed a statistically significant reduction in ICDAS scores, with the authors concluding that intensive remineralising varnish application controlled lesion activity and that newer fluoride systems appeared more effective than conventional sodium fluoride varnish (Caleza-Jiménez et al., Clin Exp Dent Res 2026-08-01, PMID 42418809). Small evidence base; the same caution about quality applies.
Infiltration: what it is, and where the evidence stops
Resin infiltration threads low-viscosity resin into the porous body of a non-cavitated lesion after the surface is etched, blocking the diffusion paths bacteria and acid use. It is the only option in this article that changes how the tooth looks as well as how it behaves, which is why it is sold hard for post-braces white spots.
Its evidence on smooth surfaces is the network meta-analysis and the 24-month trial above. On chewing surfaces the picture is thin: a systematic review of resin infiltrants in non-cavitated occlusal lesions found eight studies, of which only two were randomised trials and six were in vitro or ex vivo; the two trials showed reduced caries progression versus controls with efficacy comparable to conventional sealants, risk of bias was low to moderate, and the reviewers rated the certainty of clinical evidence as low, limited by the small number of trials and short follow-up (Miranda et al., J Clin Med 2026-02-01, PMID 41682994). A sealant, in other words, is the better-supported version of the same idea on an occlusal surface — backed by 38 trials and 7,924 children in the Cochrane review of sealants (Ahovuo-Saloranta et al., Cochrane Database Syst Rev 2017-07-01, PMID 28759120) — and the real-world data on arresting occlusal lesions with sealants came out favourably (Shah et al., Caries Res 2025-01-01, PMID 39154643).
When there is already a hole: the three honest options
Once a lesion is cavitated, the tooth has a place that cannot be cleaned, and “remineralise it” is no longer the right question. Three strategies have trial evidence, and the differences between them are larger than most patients are told.
| Strategy | What it means in the chair | Best verified result |
|---|---|---|
| Conventional restoration | Caries removal, local anaesthesia, filling | 60.8% two-year clinical success in primary molars (n = 31), slower and more equipment-dependent (Narbutaite et al., J Dent 2024-11-01, PMID 39374732) |
| Hall technique | Preformed metal crown cemented over the tooth without caries removal, without local anaesthesia, without drilling | 93.8% two-year success (n = 30) (Narbutaite et al., J Dent 2024-11-01, PMID 39374732); highest success at six months in a network meta-analysis of 68 RCTs and 12,094 treatments (Sahebalam et al., BMC Oral Health 2025-09-01, PMID 41013342) |
| Non-restorative cavity control | No restoration: plaque disruption, fluoride, diet, review — the cavity stays open | 42.5% two-year success (n = 14) — the trial authors note it works only with adequate access to brushing and fluoride (Narbutaite et al., J Dent 2024-11-01, PMID 39374732) |
| Silver diamine fluoride | Painted on, arrests lesion activity, stains the surface dark | One of the three approaches with significant benefit in the umbrella review of 49 systematic reviews (Padilla-Cáceres et al., Front Dent Med 2025-01-01, PMID 41602568); arrest rises 75% → 84% as application time goes 4 s → 60 s (Yan et al., J Dent Res 2025-12-01, PMID 40583169); in a school-based cluster trial, SDF and atraumatic restorative treatment had similar failure in surface control (Ruff et al., JAMA Netw Open 2025-06-01, PMID 40489112) |
The pattern is uncomfortable but consistent: for a cavitated baby molar, doing less drilling and more sealing/crowning works better than the traditional pathway in these trials, and pure “watch and brush” without fluoride and access is the weakest option at 42.5%. For permanent teeth in adults, the Cochrane evidence on treating dentine lesions is more equivocal — composite restorations had higher failure odds than the silver-diamine-fluoride-plus-sealant approach (OR 2.06, 95% CI 1.34 to 3.17; 398 teeth, moderate certainty) and than sealant-only in some comparisons (OR 11.32, 95% CI 1.97 to 65.02; 179 teeth, very low certainty), while in cavitated-but-not-deep lesions there was insufficient evidence of a difference between conventional and sealed approaches (OR 0.62, 95% CI 0.21 to 1.88; 204 teeth) (Schwendicke et al., Cochrane Database Syst Rev 2021-07-01, PMID 34280957). Those wide intervals are the finding, not a footnote.
Arrested caries: a real clinical state, with limits
“Arrested” means the lesion has stopped progressing — hard, dark, often shiny, and no longer active. It is not the same as cured: the cavity, if there was one, is still a cavity, and the tissue is not restored to original structure. The trials above are the reason dentists increasingly accept arrest as a treatment goal in children, and the school-based cluster trial that compared silver diamine fluoride with atraumatic restoration concluded that both were usable as secondary prevention in that setting — that is, similar failure rates in surface control, not superiority (Ruff et al., JAMA Netw Open 2025-06-01, PMID 40489112).
Two numbers set expectations for SDF specifically. In 665 children with 3,024 active surfaces, the estimated proportion of arrested lesions rose from 75% at 4 seconds of application to 84% at 60 seconds, with the benefit per additional second falling from 0.1%/s to 0.05%/s — a dose–response curve, not a “leave it on longer” slogan (Yan et al., J Dent Res 2025-12-01, PMID 40583169). And when SDF was alternated with fluoride varnish over two years in a separate randomised trial, the combination gave only a modest, non-significant additional benefit over semiannual SDF alone; the authors stressed that success depended on oral hygiene, sugar intake and socioeconomic factors (Kelmendi et al., Med Arch 2025-01-01, PMID 41282046). Prevention and diet are not optional extras bolted onto the chemical: they are the exposure.
The thing nobody has settled: diet, and the “remineralise from inside” idea
You will be told that a particular diet can reverse cavities. There is a serious, published argument for a systemic nutritional role in caries — a narrative review in Nutrients summarising animal and human work suggesting that a diet high in calcium, phosphorus, fat-soluble vitamins A and D and vitamin C, and low in phytates, may contribute to caries arrest and reversal, particularly in children, and noting that these studies “have not been revisited in decades” and need rigorous reinvestigation (Malin et al., Nutrients 2024-05-01, PMID 38794700). That is an honest description of the state of that literature: intriguing, old, mechanistically plausible, and not a basis for replacing fluoride, sealing or crown-based management. What is not controversial is the local sugar effect: pooled cohort data put the association between early sugar consumption and caries at OR 1.59 (95% CI 1.50 to 1.68) (Echeverria et al., Braz Oral Res 2025-01-01, PMID 41259577).
Cost, coverage, and how to argue for the cheap option
There is a quiet economic logic to this whole page, and Utah’s public children’s dental benefit makes it explicit (Summary of Benefits Report for Utah, Medicaid; data as of 04 February 2026; see Additional documents). Fluoride varnish is covered up to four times per calendar year, and for children under five it may be applied by a doctor at a well-child visit — that is a way to get the fluoride component of white-spot management delivered without a dental appointment at all. Sealants are covered once every two years per tooth on first and second permanent molars and premolars where the tooth has no decay or filling, which is exactly the non-cavitated indication with the 3.0% versus 8.2% progression data (Shah et al., Caries Res 2025-01-01, PMID 39154643). Silver diamine fluoride is covered for children with baby teeth once every six months per tooth and is described in the document as a non-invasive alternative to traditional fillings. Stainless steel crowns — the material the Hall technique uses — are allowed once every two years per tooth for children with large cavities or after a nerve treatment. That last line matters: the option with the best two-year success number in the trial above is also a covered benefit, not an exotic refusal of care (Narbutaite et al., J Dent 2024-11-01, PMID 39374732).
What the plan does not buy is also worth knowing before you argue with it: treatment of jaw joint problems including occlusal appliances is non-covered, orthodontics requires prior authorisation and is limited to once per lifetime, and general anaesthesia or IV sedation is covered only where a child cannot be treated safely under local anaesthesia because of a physical or mental disability or another complex medical condition. So the sequence that both the trials and the payer favour is the same one: manage the chemistry, seal what is sealable, arrest what is arrested, and escalate to drilling under sedation only when the less invasive routes have been used and failed. A second opinion is reasonable whenever a plan consists purely of many restorations under sedation with no preventive schedule attached.
How to check at home whether anything is changing
None of the trials in this article measured what a parent can measure, but the direction they point to is simple enough to use. Once every three months, in the same light, with the teeth clean and dried, photograph the same areas on the same phone setting. Then look at exactly three things. One: is the white area larger, or is the surface no longer smooth — a chalky lesion that begins to catch the probe or to look broken is a lesion that has cavitated and has moved into the treatment literature, not the remineralisation one (Schwendicke et al., Cochrane Database Syst Rev 2021-07-01, PMID 34280957). Two: has the colour gone brown or black while the surface stayed hard and shiny — that is what arrest looks like, and it is an acceptable outcome, not a failure (Yan et al., J Dent Res 2025-12-01, PMID 40583169). Three: is there a new white band along the gumline on a different tooth, which usually means the frequency of fermentable carbohydrate changed, not that the toothpaste stopped working (Enax et al., Dent J (Basel) 2026-06-01, PMID 42345977). Bring the photos to the visit. The whole evidence base here rests on transition between states over time, and the clinician sees only one moment unless you give them the series.
How to read this like a clinician
- Classify before you treat. Cavitated or not is the variable that changes everything: it is the boundary between the remineralisation literature and the restoration literature (Schwendicke et al., Cochrane Database Syst Rev 2021-07-01, PMID 34280957) (Miranda et al., J Clin Med 2026-02-01, PMID 41682994).
- For a non-cavitated smooth-surface lesion, the ranked evidence favours varnish and CPP-ACP-type agents over mouthwash; the network meta-analysis found no significant effect for fluoride mouthwash or toothpaste alone on lesion score (Hussain et al., BMC Oral Health 2026-02-01, PMID 41723426). Prescribe them for the background effect, not as the treatment.
- For a non-cavitated occlusal lesion, seal it: that is the option with a 38-trial Cochrane review behind it (Ahovuo-Saloranta et al., Cochrane Database Syst Rev 2017-07-01, PMID 28759120) and with real-world progression data (8.2% vs 3.0% restored at two years) (Shah et al., Caries Res 2025-01-01, PMID 39154643).
- For a cavitated primary molar, discuss the Hall technique before proposing a conventional filling, and document the two-year success figures for each option (Narbutaite et al., J Dent 2024-11-01, PMID 39374732) (Sahebalam et al., BMC Oral Health 2025-09-01, PMID 41013342).
- Do not offer “watch and brush” as an equivalent to treatment unless you can verify that the family can actually do the mechanical cleaning; the trial number for that pathway is 42.5% success (Narbutaite et al., J Dent 2024-11-01, PMID 39374732).
- Set the SDF expectation from the curve, not the folklore: roughly three-quarters of lesions arrested at the shortest practical application, four-fifths at a minute (Yan et al., J Dent Res 2025-12-01, PMID 40583169). Warn about staining; promise arrest, not restoration.
- Re-examine on a schedule, because the outcome you are tracking is transition (active → arrested → cavitated), not a snapshot; ICDAS-style scoring is what the primary-teeth varnish review used as its endpoint (Caleza-Jiménez et al., Clin Exp Dent Res 2026-08-01, PMID 42418809).
Evidence at a glance
| Question | Best estimate | Certainty, as rated by the source |
|---|---|---|
| Which agents reduce white spot score (orthodontic patients) | SMD −1.38 to −0.94 for SAP/NovaMin/nano-agents/xylitol varnish/CPP-ACP; 70 RCTs, 4,634 (Hussain et al., BMC Oral Health 2026-02-01, PMID 41723426) | CINeMA high to low |
| Do mouthwash or fluoride toothpaste reduce the score | No significant effect (Hussain et al., BMC Oral Health 2026-02-01, PMID 41723426) | Same network |
| Prevention of lesion prevalence | OR 0.25 to 0.32 (varnish, fluoride combinations, CPP-ACP) (Hussain et al., BMC Oral Health 2026-02-01, PMID 41723426) | Moderate quality per authors |
| Infiltration vs varnish vs CPP-ACP vs toothpaste, 24 months | Change in area −56.66 vs −42.01 vs −45.27 vs −35.19 (Zhou et al., BMC Oral Health 2026-05-01, PMID 42218470) | n = 73 randomised, 57 completed |
| Sealing a non-cavitated occlusal lesion | 3.0% vs 8.2% restored at 2 y; RR 0.37 (0.16 to 0.88) (Shah et al., Caries Res 2025-01-01, PMID 39154643) | Observational, 7,299 teeth |
| Hall vs conventional vs non-restorative (primary molars) | 93.8% / 60.8% / 42.5% success at 2 y (Narbutaite et al., J Dent 2024-11-01, PMID 39374732) | RCT, 116 children |
| Same question by network meta-analysis | Hall highest success at 6 months; 68 RCTs, 12,094 treatments (Sahebalam et al., BMC Oral Health 2025-09-01, PMID 41013342) | CINeMA rated; 6-month data strongest |
| Resin infiltration on occlusal non-cavitated lesions | Comparable to sealants; 2 RCTs of 8 studies (Miranda et al., J Clin Med 2026-02-01, PMID 41682994) | Low certainty |
| SDF application time | 75% (4 s) → 80% (16 s) → 84% (60 s) (Yan et al., J Dent Res 2025-12-01, PMID 40583169) | RCT, 665 children, 9 arms |
| Treating dentine lesions in permanent teeth | Conventional composite worse than SDF+sealant: OR 2.06 (1.34 to 3.17) (Schwendicke et al., Cochrane Database Syst Rev 2021-07-01, PMID 34280957) | Moderate (that comparison) |
What the evidence does not support
- That a white spot can be “cured” by a toothpaste alone: in the network meta-analysis fluoride toothpaste alone had no significant effect on lesion score, and in the 24-month trial it was the weakest of four arms (Hussain et al., BMC Oral Health 2026-02-01, PMID 41723426) (Zhou et al., BMC Oral Health 2026-05-01, PMID 42218470).
- That infiltration shrinks lesions on chewing surfaces the way it does on smooth ones: the systematic review there is two trials and six laboratory studies, certainty low (Miranda et al., J Clin Med 2026-02-01, PMID 41682994).
- That any intervention reliably reduces lesion size — the network found none (Hussain et al., BMC Oral Health 2026-02-01, PMID 41723426).
- That leaving a cavitated lesion alone is neutral: without verified plaque control and fluoride, non-restorative control succeeded in 42.5% of cases at two years (Narbutaite et al., J Dent 2024-11-01, PMID 39374732).
- That SDF restores tooth structure or is painless-forever-friendly: it arrests, it stains, and the best verified arrest figures are 75–84% depending on contact time (Yan et al., J Dent Res 2025-12-01, PMID 40583169).
- That dietary protocols reverse cavities in the way social media claims: the serious review of the nutrition literature explicitly calls for the old studies to be reinvestigated with modern methods (Malin et al., Nutrients 2024-05-01, PMID 38794700).
- That a white mark is always decay. Developmental opacities and hypomineralisation look similar and behave differently; the trials here enrolled lesions around brackets and carious lesions by ICDAS-style criteria, not every white thing (Hussain et al., BMC Oral Health 2026-02-01, PMID 41723426) (Caleza-Jiménez et al., Clin Exp Dent Res 2026-08-01, PMID 42418809).
A plan, if you want one
- Get the classification in writing at the visit: non-cavitated or cavitated; active or arrested; which surfaces. This is the variable every number above depends on.
- If non-cavitated: fluoride varnish on a schedule (up to four times a year is what many public child programmes allow), twice-daily brushing with fluoride toothpaste as background, diet frequency addressed, and an occlusal sealant where the lesion is on a chewing surface (Hussain et al., BMC Oral Health 2026-02-01, PMID 41723426) (Shah et al., Caries Res 2025-01-01, PMID 39154643).
- If appearance is the problem (post-braces, front teeth), ask about infiltration and quote the 24-month comparison rather than the marketing (Zhou et al., BMC Oral Health 2026-05-01, PMID 42218470).
- If cavitated in a baby molar: ask explicitly whether the Hall technique is an option before agreeing to drilling and a filling, and if it is refused, ask why (Narbutaite et al., J Dent 2024-11-01, PMID 39374732) (Sahebalam et al., BMC Oral Health 2025-09-01, PMID 41013342).
- If surgery is not feasible now (age, anxiety, access): SDF applied with an honest minute of contact time, then re-check at six months (Yan et al., J Dent Res 2025-12-01, PMID 40583169).
- Photograph under the same conditions every six months. Transition, not appearance, is the outcome you are managing.
Frequently asked questions
Will my white spot go away on its own? Sometimes the activity stops — that is what arrest is — but “go away” in the sense of the mark disappearing is not what the trials show: the arms that worked changed the score or the area over 24 months with an active agent, and lesion size was not significantly reduced by any intervention (Hussain et al., BMC Oral Health 2026-02-01, PMID 41723426) (Zhou et al., BMC Oral Health 2026-05-01, PMID 42218470).
Is a filling always necessary? No — for a non-cavitated lesion, sealing has better verified outcomes than restoring: 3.0% versus 8.2% progressing to restoration over two years in the real-world cohort (Shah et al., Caries Res 2025-01-01, PMID 39154643). For a cavitated one, “no restoration” is a decision that needs a working substitute (crown, SDF plus supervision), not the absence of a plan (Narbutaite et al., J Dent 2024-11-01, PMID 39374732).
Can fluoride toothpaste alone fix it? In the network it did not significantly reduce lesion score; as the sole treatment in the 24-month trial it was the weakest arm (Hussain et al., BMC Oral Health 2026-02-01, PMID 41723426) (Zhou et al., BMC Oral Health 2026-05-01, PMID 42218470). Keep using it — it is the background, not the intervention.
Why is my child’s baby molar being capped instead of filled? Because in the head-to-head trial the crown (Hall) reached 93.8% two-year success versus 60.8% for conventional restoration, without drilling or anaesthesia (Narbutaite et al., J Dent 2024-11-01, PMID 39374732).
Does SDF hurt? The verified trials here report tolerance rather than pain spikes; the 116-child trial states all three techniques were well tolerated (Narbutaite et al., J Dent 2024-11-01, PMID 39374732). The issue with SDF is the stain and the follow-up, not the application.
What about the “remineralising” powders and peptide pastes? In the network, self-assembling peptide and similar agents were among the top-ranked for lesion score, and bioactive-additive varnishes significantly reduced ICDAS scores in the primary-teeth review — but these are the outcomes of short trials with sparse networks (Hussain et al., BMC Oral Health 2026-02-01, PMID 41723426) (Caleza-Jiménez et al., Clin Exp Dent Res 2026-08-01, PMID 42418809). Reasonable add-ons, not substitutes for removing the sugar frequency or for sealing.
Glossary: mirror words ↔ chart words
| What you say | What the chart says | How it is judged |
|---|---|---|
| “A white patch” | White spot lesion; initial/non-cavitated caries lesion; enamel opacity (if developmental) | Visual after air-drying, ICDAS code, cavitation on probe (Caleza-Jiménez et al., Clin Exp Dent Res 2026-08-01, PMID 42418809) |
| “It isn’t a hole yet” | Surface intact, subsurface porosity | The inclusion criterion of the remineralisation trials (Hussain et al., BMC Oral Health 2026-02-01, PMID 41723426) (Miranda et al., J Clin Med 2026-02-01, PMID 41682994) |
| “It stopped” | Arrested lesion (hard, dark, inactive) | Activity at the surface level; arrest rates per lesion (Yan et al., J Dent Res 2025-12-01, PMID 40583169) |
| “The metal cap without drilling” | Hall technique / preformed metal crown cemented over unremoved caries | Two-year clinical success; network meta-analysis at 6/12/24 months (Narbutaite et al., J Dent 2024-11-01, PMID 39374732) (Sahebalam et al., BMC Oral Health 2025-09-01, PMID 41013342) |
| “The brown liquid” | 38% silver diamine fluoride | Arrest vs placebo or vs alternative; contact-time dose–response (Yan et al., J Dent Res 2025-12-01, PMID 40583169) (Ruff et al., JAMA Netw Open 2025-06-01, PMID 40489112) |
| “Painting the hole shut” | Non-restorative cavity control | Success rate with supervision; 42.5% at two years in the trial (Narbutaite et al., J Dent 2024-11-01, PMID 39374732) |
| “Sealing the grooves” | Pit-and-fissure sealant over non-cavitated lesion | Progression to restoration; retention (Shah et al., Caries Res 2025-01-01, PMID 39154643) (Ahovuo-Saloranta et al., Cochrane Database Syst Rev 2017-07-01, PMID 28759120) |
| “Resin soaks into the spot” | Icon-type resin infiltration | Change in lesion area over 24 months (Zhou et al., BMC Oral Health 2026-05-01, PMID 42218470) |
Related reading on this site: which swelling signs mean the emergency department, what the peroxide evidence says about whitening, whether you actually need that filling and what the water-fluoridation evidence actually shows.
How this page was built, and what it cannot tell you
Every record was pulled programmatically from Europe PMC — authors, journal, volume, issue, pages, DOI, open-access status, citation count — and the abstracts were read in full; only numbers printed in them are quoted, including the sources’ own certainty ratings (CINeMA, GRADE, RoB 2, JBI). Where a confidence interval is wide or crosses zero, that is said in the same sentence as the number. Where a trial is small, n is given: two of the most useful comparisons here have 116 and 73 participants.
What this page cannot tell you: whether your mark is decay or a developmental defect (it needs a dry-surface look and a probe); whether your lesion has reached dentine (that needs radiographs in many cases); whether your dentist’s recommendation to fill now is wrong (the trials are about populations and averages, and a tooth with a cavitated lesion and poor hygiene is a different bet than the average tooth in a supervised trial); or what any of this costs. And it cannot tell you what your own brushing does — because in every one of these trials, that variable is what makes the difference between 42.5% and 93.8% (Narbutaite et al., J Dent 2024-11-01, PMID 39374732).
Sources
Peer-reviewed evidence
- Ahovuo-Saloranta A, Forss H, Walsh T, Nordblad A, Mäkelä M, Worthington HV. Pit and fissure sealants for preventing dental decay in permanent teeth. Cochrane Database Syst Rev 2017-07-01;7():CD001830. doi:10.1002/14651858.cd001830.pub5 · PMID 28759120 · PMCID PMC6483295 · cited by 204 (Europe PMC)
- Schwendicke F, Walsh T, Lamont T, Al-Yaseen W, Bjørndal L, Clarkson JE, Fontana M, Gomez Rossi J, Göstemeyer G, Levey C, Müller A, Ricketts D, Robertson M, Santamaria RM, Innes NP. Interventions for treating cavitated or dentine carious lesions. Cochrane Database Syst Rev 2021-07-01;7():CD013039. doi:10.1002/14651858.cd013039.pub2 · PMID 34280957 · PMCID PMC8406990 · cited by 63 (Europe PMC)
- Malin AJ, Wang Z, Khan D, McKune SL. The Potential Systemic Role of Diet in Dental Caries Development and Arrest: A Narrative Review. Nutrients 2024-05-01;16(10):1463. doi:10.3390/nu16101463 · PMID 38794700 · PMCID PMC11124059 · open access · cited by 17 (Europe PMC)
- Shah NH, Fellows JL, Polk DE. Adoption and Effect of Sealants for Occlusal Noncavitated Caries in a Large Dental Network in the USA. Caries Res 2025-01-01;59(1):11-21. doi:10.1159/000540884 · PMID 39154643 · PMCID PMC11790370 · cited by 3 (Europe PMC)
- Narbutaite J, Santamaría RM, Innes N, Splieth CH, Maciulskiene V. Comparison of three management approaches for dental caries in primary molars: A two-year randomized clinical trial. J Dent 2024-11-01;150():105390. doi:10.1016/j.jdent.2024.105390 · PMID 39374732 · cited by 7 (Europe PMC)
- Ruff RR, Gawande AA, Xu Q, Barry Godín T. Silver Diamine Fluoride vs Atraumatic Restoration for Managing Dental Caries in Schools: A Cluster Randomized Clinical Trial. JAMA Netw Open 2025-06-01;8(6):e2513826. doi:10.1001/jamanetworkopen.2025.13826 · PMID 40489112 · PMCID PMC12150187 · open access · cited by 5 (Europe PMC)
- Yan IG, Zheng FM, Sun IG, Lo ECM, Duangthip D, Chu CH. A Randomized Controlled Trial of Silver Diamine Fluoride Application Time. J Dent Res 2025-12-01;104(13):1453-1461. doi:10.1177/00220345251345801 · PMID 40583169 · PMCID PMC12612282 · open access · cited by 2 (Europe PMC)
- Sahebalam R, Ghorbani M, Shirazi AS, Khosrojerdi M, Mowji M. Comparative success of minimally invasive treatments for cavitated caries in primary teeth: a network meta-analysis. BMC Oral Health 2025-09-01;25(1):1469. doi:10.1186/s12903-025-06832-3 · PMID 41013342 · PMCID PMC12465559 · open access · cited by 1 (Europe PMC)
- Echeverria MS, Mathias FB, Schuch HS, Cenci MS, Correa MB, Huysmans MC, Demarco FF. Sugar consumption and early childhood caries: a systematic review and meta-analysis of cohort studies. Braz Oral Res 2025-01-01;39():e122. doi:10.1590/1807-3107bor-2025.vol39.122 · PMID 41259577 · PMCID PMC12628725 · open access · cited by 1 (Europe PMC)
- Kelmendi M, Robo I, Petro E, Kelmendi S. Silver Diamine Fluoride in Arresting Dental Caries Among Young Children: a Randomized Clinical Trial. Med Arch 2025-01-01;79(5):399-405. doi:10.5455/medarh.2025.79.399-405 · PMID 41282046 · PMCID PMC12634075 · open access
- Padilla-Cáceres TC, Arbildo-Vega HI, Mamani-Cori V, Caballero-Apaza LM, Cruzado-Oliva FH, Farje-Gallardo CA, Marroquín-Soto C, Aguirre-Ipenza R, Vásquez-Rodrigo H, Luján-Valencia SA, Meza-Málaga JM, Castillo-Cornock TB, Coronel-Zubiate FT. Effect of minimal intervention on carious lesions in primary teeth. An Umbrella review. Front Dent Med 2025-01-01;6():1751752. doi:10.3389/fdmed.2025.1751752 · PMID 41602568 · PMCID PMC12833399 · open access · cited by 1 (Europe PMC)
- Miranda SB, Lins RBE, Silveira JAMD, Leal CFC, Souza CMC, Moura HS, Guimarães LG, Prosini P, Montes MAJR. Efficacy of Resin Infiltrants in Non-Cavitated Occlusal Carious Lesions: A Systematic Review. J Clin Med 2026-02-01;15(3):1310. doi:10.3390/jcm15031310 · PMID 41682994 · PMCID PMC12897895 · open access
- Hussain U, Kunwar SS, Khan UW, Kamran MA, Thakfan AS, Alshahrani OA, Rehman A, Niazi FH, Shah AM, Alam S, Campobasso A. Efficacy of various interventions for the management of white spot lesions associated with fixed orthodontic treatment: a systematic review and network meta-analysis of randomized controlled trials. BMC Oral Health 2026-02-01;26(1):358. doi:10.1186/s12903-026-07755-3 · PMID 41723426 · PMCID PMC12925361 · open access
- Zhou Y, Wang Q, Cui T, Li J, Lo ECM, Hao G, Huang F, Pang L, Zhi Q. Comparative assessment of four treatments for post orthodontic white spot lesions over a 24-month period: a randomized controlled clinical trial. BMC Oral Health 2026-05-01;26(1):1495. doi:10.1186/s12903-026-08740-6 · PMID 42218470
- Enax J, Schulze Zur Wiesche E, Epple M. Tooth Enamel Demineralization: Caries and Erosion from the Viewpoint of Chemistry. Dent J (Basel) 2026-06-01;14(6):387. doi:10.3390/dj14060387 · PMID 42345977 · PMCID PMC13298224 · open access
- Caleza-Jiménez C, Biedma-Perea M, Ribas-Pérez D, Barra-Soto MJ, Arenas-González M. Effectiveness in Remineralizing White Spot Lesions in Primary Teeth With Varnishes: A Systematic Review. Clin Exp Dent Res 2026-08-01;12(4):e70403. doi:10.1002/cre2.70403 · PMID 42418809
Additional documents
- InsureKidsNow (CMS). Summary of Benefits Report for Utah, Medicaid — dental (data as of 04 Feb 2026) — fluoride treatments including varnish up to 4× per calendar year, applicable by a doctor at a well-child visit under age 5 and in a dental office from age 5; sealants 1× every 2 years per tooth on first/second permanent molars and premolars without decay or restorations; silver diamine fluoride for children with primary teeth every 6 months per tooth, described as a non-invasive alternative to traditional fillings; stainless steel crowns every 2 years per tooth; TMJ therapy and occlusal appliances non-covered; orthodontics once per lifetime with prior authorisation via the Utah IOTN sheet; general anaesthesia/IV sedation only where local anaesthesia is not safe (PDF)
Bibliographic records above were retrieved and verified programmatically from Europe PMC (authors, journal, volume, pages, DOI, PMID, citation count). Coverage, guideline and regulatory statements are quoted from the cited public documents with their dates; verify against the current version before relying on them. This article is not medical or dental advice.