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Dental Fluorosis

Dental Fluorosis — Comprehensive Disease Characteristics Report

2026-05-18
Falcon MONDO:0006722 Model: Edison Scientific Literature 39 citations

Dental Fluorosis — Comprehensive Disease Characteristics Report

Target disease

  • Disease name: Dental fluorosis
  • Category: Complex, multifactorial developmental defect of enamel
  • Key note on evidence sources: This report primarily synthesizes peer‑reviewed human epidemiology (NHANES), regional systematic review/meta-analysis, genetic association study, mechanistic review, and an animal multi-omics study, plus ClinicalTrials.gov records. The retrieved corpus did not contain ICD-10/ICD-11, MONDO, Orphanet, or SNOMED CT identifiers; where identifiers are missing, this is stated explicitly.

1. Disease information

1.1 Concise overview (current understanding)

Dental fluorosis is a developmental enamel defect arising from excess fluoride exposure during tooth development (odontogenesis), producing a spectrum of enamel changes (from mild white opacities/striations to more extensive hypomineralization and, at higher severity, post‑eruptive breakdown). (gamarra2024associationbetweenfluoride pages 1-2, hung2023anationalstudy pages 1-2, fejerskov1990thenatureand pages 1-2)

Direct abstract quotes supporting definition: - “Dental fluorosis (DF) is caused by excessive exposure to fluoride during odontogenesis and leads to various changes in the development of tooth enamel.” (Gamarra et al., 2024, BMC Oral Health; published 2024-06; https://doi.org/10.1186/s12903-024-04472-7) (gamarra2024associationbetweenfluoride pages 1-2) - “Fluoride is commonly consider as a ‘double-edged sword’ because low consumption of fluoride can effectively prevent dental caries, but excessive consumption of fluoride can cause fluorosis.” (Zhang et al., 2023, Frontiers in Cell and Developmental Biology; published 2023-05; https://doi.org/10.3389/fcell.2023.1168215) (zhang2023advancesinepidemiological pages 1-2)

1.2 Key identifiers and controlled vocabulary

MeSH (explicitly present in retrieved ClinicalTrials.gov records): - Fluorosis, Dental (MeSH ID: D009050) (NCT05204277 chunk 2, NCT05339503 chunk 2) - Fluoride Poisoning (MeSH ID: D005458) appears in some fluorosis-related trial browse modules (NCT01733888 chunk 2, NCT03746990 chunk 1)

ICD-10 / ICD-11 / MONDO / Orphanet / SNOMED CT: Not found in the retrieved evidence corpus; therefore not asserted here.

1.3 Synonyms and alternative names

  • “Mottled enamel” / “mottling of enamel” is discussed as a broader descriptor in classic fluorosis literature and appears in at least one fluorosis record excerpt (“mottling of enamel is the most frequently seen and most reliable sign of excessive quantities of fluoride…”). (NCT03746990 chunk 1, fejerskov1990thenatureand pages 1-2)

1.4 Evidence provenance (individual vs aggregated)

2. Etiology

2.1 Primary causal factors

Excess fluoride exposure during enamel formation is the central environmental cause, with susceptibility confined to the tooth-development window. (gamarra2024associationbetweenfluoride pages 1-2, hung2023anationalstudy pages 1-2)

The Mexico systematic review emphasizes a high-risk developmental period: “the period from six months to four years” as highest risk (as reported in the review text). (gamarra2024associationbetweenfluoride pages 1-2)

2.2 Risk factors (recent and quantitative)

2.2.1 Drinking water fluoride concentration (systemic exposure)

In NHANES 2013–2016 (US children/adolescents 6–15 years), higher fluoride in water and plasma was associated with higher odds of fluorosis graded by Dean’s Index. (hung2023anationalstudy pages 1-2, hung2023anationalstudy pages 4-5) - Water fluoride >0.70 mg/L: adjusted OR 2.790 (95% CI 1.582–5.249) for fluorosis (combined cycles). (hung2023anationalstudy pages 7-8) - Plasma fluoride >0.50 μmol/L: adjusted OR 1.659 (95% CI 1.154–2.430) (combined cycles). (hung2023anationalstudy pages 7-8)

Direct abstract quote: - “This cross-sectional study of 2995 children and adolescents found that higher fluoride levels in water and plasma were associated with dental fluorosis.” (Hung et al., 2023, JAMA Network Open; published 2023-06; https://doi.org/10.1001/jamanetworkopen.2023.18406) (hung2023anationalstudy pages 7-8)

2.2.2 Endemic regions and severity gradients (Mexico example, 2024)

In a 2024 systematic review/meta-analysis focused on Northern vs Western Mexico, higher water fluoride in the North was associated with greater fluorosis severity using the TF index. (gamarra2024associationbetweenfluoride pages 1-2) - North region: higher prevalence of severe cases ≥ TF 5, pooled estimate 4.78 [3.55, 6.42]. (gamarra2024associationbetweenfluoride pages 1-2)

2.2.3 Other environmental sources (review-level)

Recent review synthesis lists multiple fluoride sources associated with DF risk, including high-fluoride drinking water and other exposure routes (e.g., toothpaste and region-specific dietary/environmental sources), with children being particularly susceptible. (zhang2023advancesinepidemiological pages 1-2)

2.3 Protective factors

The retrieved NHANES analysis did not show an increased fluorosis risk signal for reported supplement use (interpretable as reflecting targeted use patterns); however, this should not be interpreted as a general “protective” effect. - Self-reported fluoride supplements: adjusted OR 0.727 (95% CI 0.459–1.041) in combined-cycle analysis. (hung2023anationalstudy pages 7-8)

2.4 Gene–environment interactions

A recent mechanistic/epidemiology review indicates that genetic factors may modify susceptibility under similar fluoride exposure environments and cites gene–environment interaction work (e.g., antioxidant genes with fluoride exposure), but effect sizes were not available in the retrieved excerpts. (zhang2023advancesinepidemiological pages 4-5)

3. Phenotypes

3.1 Core clinical phenotypes

  • Enamel opacity/white striations (often mild)
  • Diffuse opacities and discoloration (yellow/brown staining can occur post-eruption)
  • Hypomineralized, porous enamel; in more severe cases, post-eruptive enamel breakdown (fejerskov1990thenatureand pages 1-2)

Age of onset / temporal relation: arises during childhood odontogenesis, becomes clinically apparent upon eruption of affected teeth; risk is constrained to the developmental window (NHANES paper notes risk limited to children whose permanent teeth are still developing). (hung2023anationalstudy pages 1-2)

3.2 Severity indices and standardized assessment

A simplified TF method (six upper anterior teeth) showed high diagnostic accuracy in endemic areas: sensitivity 90.6%, specificity 100%, ROC 0.953. (Adelário et al., 2010; https://doi.org/10.3390/ijerph7030927) (from retrieved paper list; quantitative values summarized in artifact; not separately evidenced by a pqac excerpt beyond tool retrieval)

3.3 Suggested HPO phenotype terms (proposed mappings)

Because the retrieved sources did not provide explicit HPO mappings, the following are reasonable candidate mappings based on described clinical manifestations: - Enamel hypomineralization (candidate; aligns with MeSH ancestor “Dental Enamel Hypomineralization”). (NCT05204277 chunk 2) - Abnormal tooth enamel coloration / enamel opacity (candidate) - Enamel hypoplasia may be relevant particularly in severe/endemic fluorosis contexts described as structural defects. (fejerskov1990thenatureand pages 1-2)

3.4 Quality of life impact

No 2023–2024 QoL primary studies were retrieved in the tool outputs. The available corpus includes older pediatric QoL evidence indicating fluorosis may impact specific domains (functional domain) rather than overall QoL scores in that sample. (rozier1994epidemiologicindicesfor pages 1-2)

4. Genetic / molecular information

4.1 Causal vs susceptibility genes

Dental fluorosis is not represented in the retrieved corpus as a single-gene (Mendelian) disorder; evidence supports susceptibility/modifier genetics.

4.2 Pathogenic/susceptibility variants (human)

COL1A2 rs412777 (2024, Tunisia; case-control): - Study: 95 participants (51 DF cases, 44 controls) collected 2022-07 to 2022-11; DF phenotyped with Dean index; genotyped by PCR-RFLP. (kallala2024theassociationbetween pages 2-4, kallala2024theassociationbetween pages 1-2) - A allele protective (C vs A): OR 0.375 (95% CI 0.207–0.672; p=0.001). (kallala2024theassociationbetween pages 2-4) - AA genotype protective: codominant OR 0.18 (95% CI 0.06–0.55; p=0.002) and dominant OR 0.19 (95% CI 0.07–0.52; p<0.001). (kallala2024theassociationbetween pages 2-4)

Direct abstract quote: - “A allele carriers were significantly protected against (DF) when compared to those with the C allele (C vs. A, p = 0.001; OR = 0.375 (0.207–0.672)).” (Kallala et al., 2024; published 2024-03; https://doi.org/10.1186/s12903-024-04086-z) (kallala2024theassociationbetween pages 2-4)

4.3 Additional candidate genes (review synthesis)

A 2023 review summarizes candidate gene associations including TIMP1, DLX1, DLX2, AMBN, COL14A1, MMP20, AMELX, ESR1, SOD2, COL1A2, TFIP11, TUFT1, among others. (zhang2023advancesinepidemiological pages 2-3)

4.4 Epigenetic information (2024 animal multi-omics)

In a rat DF model (NaF exposure), transcriptomics and targeted DNA methylation implicated Atp2c1 and Nr1d1 (calcium transport, ER stress, immunity) and broad immune and ion-transport pathways. (hu2024effectoflong pages 5-7, hu2024effectoflong pages 10-13)

Direct abstract quotes: - “The results demonstrated that a total of 1723 differentially expressed genes (DEGs) and 2511 differential expression lncRNAs (DE-lncRNAs) were mainly involved in the ion channels, calcium ion transport, and immunomodulatory signaling pathways.” (Hu et al., 2024; published 2024-04; https://doi.org/10.1007/s12011-023-03660-w) (hu2024effectoflong pages 5-7) - “ATP2C1 and Nr1d1… may be the key genes in the formation of dental fluorosis.” (Hu et al., 2024; https://doi.org/10.1007/s12011-023-03660-w) (hu2024effectoflong pages 5-7)

5. Environmental information

5.1 Environmental contributors (non-genetic)

5.2 Lifestyle-related contributors

  • Use of fluoride-containing dental products is discussed as potentially contributing to higher prevalence in certain periods/contexts (NHANES discussion). (hung2023anationalstudy pages 7-8)

5.3 Infectious agents

Not applicable based on current understanding and the retrieved evidence.

6. Mechanism / pathophysiology

6.1 Causal chain (integrated model)

  1. Trigger: Excess fluoride exposure during enamel maturation and/or secretory/maturation stages of amelogenesis (systemic sources such as water; possibly additional sources depending on context). (gamarra2024associationbetweenfluoride pages 1-2, zhang2023advancesinepidemiological pages 1-2)
  2. Cellular stress responses in ameloblasts: Review synthesis emphasizes fluoride-induced oxidative stress (ROS), endoplasmic reticulum stress, intracellular Ca2+ dysregulation, and autophagy perturbation, which can progress to ameloblast apoptosis. (zhang2023advancesinepidemiological pages 1-2)
  3. Matrix processing/mineralization disruption: Mechanistic literature summarized in reviews points to impacts on enamel matrix protein processing (e.g., effects on KLK4 activity/expression) and downstream hypomineralization/porosity. (zhang2023advancesinepidemiological pages 5-5)
  4. Tissue outcome: enamel porosity/hypomineralization → clinical appearance ranging from faint opacities to chalky enamel and structural breakdown at higher severity. (fejerskov1990thenatureand pages 1-2)

6.2 Suggested GO biological process terms (proposed)

Based on mechanisms summarized in 2023–2024 sources (primarily review + animal multi-omics): - response to endoplasmic reticulum stress / unfolded protein response (zhang2023advancesinepidemiological pages 5-5, hu2024effectoflong pages 10-13) - response to oxidative stress (zhang2023advancesinepidemiological pages 1-2) - autophagy (zhang2023advancesinepidemiological pages 5-5) - apoptotic process (zhang2023advancesinepidemiological pages 1-2) - calcium ion transport / cellular calcium ion homeostasis (hu2024effectoflong pages 5-7) - immune system process / NF-κB signaling (hu2024effectoflong pages 5-7)

6.3 Suggested CL cell types (proposed)

7. Anatomical structures affected

7.1 Organ/tissue level

Suggested UBERON terms (proposed): - tooth enamel (UBERON candidate) - tooth (UBERON candidate)

8. Temporal development

8.1 Onset and critical window

8.2 Course

9. Inheritance and population

9.1 Epidemiology statistics (recent)

US (NHANES 2013–2016; JAMA Network Open 2023): - Weighted prevalence of any fluorosis: 87.3% (2013–2014) and 68.2% (2015–2016) in ages 6–15. (hung2023anationalstudy pages 7-8)

Regional endemic burden (Mexico; BMC Oral Health 2024): - Northern Mexico shows more severe fluorosis distribution (TF ≥5 pooled estimate 4.78 [3.55–6.42]). (gamarra2024associationbetweenfluoride pages 1-2)

9.2 Inheritance pattern

10. Diagnostics

10.1 Clinical criteria and indices

10.2 Differential diagnosis

Formal differential diagnosis was not detailed in retrieved excerpts; however, methodological reviews emphasize the importance of distinguishing fluoride-related enamel changes from other developmental defects of enamel. (rozier1994epidemiologicindicesfor pages 1-2)

10.3 Biomarkers

11. Outcome / prognosis

12. Treatment

12.1 Minimally invasive and esthetic management (real-world implementations)

ClinicalTrials.gov records in the retrieved corpus indicate common clinical approaches focused on esthetics for mild–moderate fluorosis:

  • Microabrasion (e.g., 6.6% HCl + silicon carbide microparticles; Opalustre). (NCT05204277 chunk 2, NCT05051748 chunk 1)
  • In‑office bleaching (e.g., Opalescence Boost PF 40% hydrogen peroxide). (NCT05051748 chunk 1)
  • Remineralization creams (e.g., MI‑Paste Plus; CPP‑ACFP). (NCT05204277 chunk 2)
  • Resin infiltration (ICON) ± bleaching. (NCT01733888 chunk 2)

12.2 Experimental/clinical trials (with NCT identifiers)

  • NCT01733888 (Completed; sponsor DMG): resin infiltration vs resin infiltration + bleaching in children 6–12 for fluorosis stains; references published outcomes (PMID 28654721) in the record. (NCT01733888 chunk 2)
  • NCT05204277 (Completed; Suez Canal University): microabrasion vs in-office bleaching vs remineralization (MI‑Paste Plus), TF score 1–4; primary outcome ∆E color change. (NCT05204277 chunk 2)
  • NCT05051748 (Completed; randomized, double-masked): multiple minimal invasive protocols (bleaching, microabrasion, remineralization and combinations) with VAS/photo ratings and patient satisfaction/sensitivity. (NCT05051748 chunk 1, NCT05051748 chunk 2)
  • NCT05339503 (Completed): comparison of microabrasion compounds with tooth shade change outcome. (NCT05339503 chunk 2)

12.3 Suggested MAXO terms (proposed)

  • enamel microabrasion (maps to MeSH “Enamel Microabrasion”; procedure present in trial record) (NCT05339503 chunk 2)
  • tooth bleaching procedure (candidate)
  • resin infiltration of enamel lesions (candidate)
  • topical remineralization therapy (candidate)

13. Prevention

13.1 Primary prevention

  • Optimize fluoride exposure during early childhood by balancing caries prevention benefits with fluorosis risk; the NHANES analysis explicitly frames policy as a balancing act and references the 2015 DHHS optimal fluoridation recommendation (0.7 mg/L) as a potential contributor to changes over time. (hung2023anationalstudy pages 7-8)

Direct abstract quote: - “These findings suggest that public health policy related to water fluoride levels and fluoridation should consider balancing caries prevention with dental fluorosis risk.” (Hung et al., 2023; https://doi.org/10.1001/jamanetworkopen.2023.18406) (hung2023anationalstudy pages 7-8)

13.2 Secondary prevention (screening)

  • Population surveillance using Dean or TF indices is a standard approach; simplified TF may support feasible screening in endemic areas (accuracy metrics reported in endemic community validation study). (rozier1994epidemiologicindicesfor pages 1-2)

13.3 Tertiary prevention

  • Esthetic minimally invasive management to address staining/opacities and potential structural susceptibility is supported by multiple clinical trial protocols. (NCT05051748 chunk 1)

14. Other species / natural disease

Not evaluated in the retrieved evidence set for this report.

15. Model organisms

A rat model with NaF exposure and mandibular molar sampling was used for transcriptomic/epigenetic profiling, providing mechanistic hypotheses linking fluoride exposure to ER stress, calcium homeostasis, and immune signaling during tooth development. (hu2024effectoflong pages 5-7)

Knowledge-base summary table

Table (click to expand)
Domain Key points Quantitative data Evidence type Key sources (with DOI/URL if available)
Identifiers Explicit MeSH disease heading available: Fluorosis, Dental; related MeSH ancestors include Dental Enamel Hypomineralization and Developmental Defects of Enamel. Some trial records also map fluorosis-related concepts to Fluoride Poisoning. Synonym/descriptor noted in classic literature: mottled enamel / mottling of enamel. No explicit ICD-10/ICD-11, MONDO, or SNOMED CT identifiers were retrieved in the available evidence. MeSH: D009050 (Fluorosis, Dental); related MeSH: D005458 (Fluoride Poisoning) Registry metadata; review/classification literature ClinicalTrials.gov-derived records (NCT05204277, NCT03746990, NCT05339503, NCT01589991) (NCT05204277 chunk 2, NCT03746990 chunk 1, NCT05339503 chunk 2, NCT01589991 chunk 2); Fejerskov et al. 1990, J Dent Res, DOI: https://doi.org/10.1177/00220345900690s135 (fejerskov1990thenatureand pages 1-2)
Definition / overview Dental fluorosis is a developmental enamel defect caused by excess fluoride exposure during tooth development/odontogenesis. It manifests as visible enamel changes ranging from faint white lines/opacities to chalky hypomineralized enamel and post-eruptive breakdown in severe cases. Most contemporary sources emphasize that fluorosis is usually mild/cosmetic, but severity rises with higher fluoride exposure. Vulnerable developmental window reported as ~6 months to 4 years in the Mexico systematic review; risk generally limited to children whose permanent teeth are still developing (often stated as up to about 8 years). Systematic review/meta-analysis; cross-sectional NHANES; classic mechanistic review Gamarra et al. 2024, BMC Oral Health, DOI: https://doi.org/10.1186/s12903-024-04472-7 (gamarra2024associationbetweenfluoride pages 1-2); Hung et al. 2023, JAMA Netw Open, DOI: https://doi.org/10.1001/jamanetworkopen.2023.18406 (hung2023anationalstudy pages 1-2); Fejerskov et al. 1990, DOI: https://doi.org/10.1177/00220345900690s135 (fejerskov1990thenatureand pages 1-2)
Main risk factors Primary risk factor is high fluoride intake during odontogenesis, especially from drinking water in endemic areas. Other exposure sources summarized in recent review include brick tea, coal-burning exposure, fluoridated foods/beverages, and toothpaste. Severity is dose-related, and Northern Mexico shows higher severity where water fluoride is higher. NHANES adjusted OR for fluorosis with water fluoride: AOR 2.378 (95% CI 1.218–5.345) in one model; combined-cycle water fluoride >0.70 mg/L AOR 2.790 (95% CI 1.582–5.249). Plasma fluoride AOR 1.568 (95% CI 1.038–2.499); combined AOR 1.659 (95% CI 1.154–2.430). Mexico meta-analysis: North region severe TF ≥5 pooled estimate 4.78 [3.55, 6.42]; West region ≤TF4 pooled estimate 0.01 [0.00, 0.52]. Cross-sectional nationally representative study; systematic review/meta-analysis; review Hung et al. 2023, DOI: https://doi.org/10.1001/jamanetworkopen.2023.18406 (hung2023anationalstudy pages 7-8, hung2023anationalstudy pages 1-2, hung2023anationalstudy pages 4-5); Gamarra et al. 2024, DOI: https://doi.org/10.1186/s12903-024-04472-7 (gamarra2024associationbetweenfluoride pages 1-2); Zhang et al. 2023, DOI: https://doi.org/10.3389/fcell.2023.1168215 (zhang2023advancesinepidemiological pages 1-2)
Epidemiology Recent high-profile US data suggest fluorosis prevalence remains common among children/adolescents, though lower in 2015–2016 than 2013–2014. Regional endemic burdens remain substantial in high-fluoride water areas such as parts of Mexico. NHANES weighted prevalence of any fluorosis: 87.3% (2013–2014) and 68.2% (2015–2016) among ages 6–15. Water fluoride means: 0.56 mg/L (2013–2014) and 0.46 mg/L (2015–2016). Cross-sectional nationally representative survey; regional systematic review/meta-analysis Hung et al. 2023, DOI: https://doi.org/10.1001/jamanetworkopen.2023.18406 (hung2023anationalstudy pages 7-8, hung2023anationalstudy pages 4-5); Gamarra et al. 2024, DOI: https://doi.org/10.1186/s12903-024-04472-7 (gamarra2024associationbetweenfluoride pages 1-2)
Genetic susceptibility Available human evidence supports modifier/susceptibility genetics, not a simple Mendelian cause. Recent Tunisian case-control data implicate COL1A2 rs412777. A recent review summarizes additional candidate loci/genes associated with susceptibility: DLX1, DLX2, MMP13, TIMP1, TIMP2, AMBN, COL14A1, MMP20, AMELX, ESR1, SOD2, TFIP11, TUFT1. COL1A2 rs412777: A allele protective OR 0.375 (95% CI 0.207–0.672; p=0.001). AA genotype protective in codominant model OR 0.18 (95% CI 0.06–0.55; p=0.002) and dominant model OR 0.19 (95% CI 0.07–0.52; p<0.001). Study size 95 (51 cases, 44 controls). Human case-control genetics; narrative review of candidate-gene studies Kallala et al. 2024, BMC Oral Health, DOI: https://doi.org/10.1186/s12903-024-04086-z (kallala2024theassociationbetween pages 2-4, kallala2024theassociationbetween pages 1-2); Zhang et al. 2023, DOI: https://doi.org/10.3389/fcell.2023.1168215 (zhang2023advancesinepidemiological pages 1-2, zhang2023advancesinepidemiological pages 2-3, zhang2023advancesinepidemiological pages 4-5, zhang2023advancesinepidemiological pages 5-5)
Gene–environment interaction Genetics appears to modify susceptibility under shared fluoride exposure environments. The review literature cites interaction studies involving antioxidant genes and fluoride exposure, and Kallala notes prior literature supporting synergistic gene–environment effects. Formal GxE effect estimates were not available in the retrieved excerpts. Qualitative only in retrieved excerpts; one review cites SOD2/SOD3 × fluoride exposure interaction studies without numerical estimates in the available text. Review of genetic epidemiology; discussion in case-control study Zhang et al. 2023, DOI: https://doi.org/10.3389/fcell.2023.1168215 (zhang2023advancesinepidemiological pages 4-5, zhang2023advancesinepidemiological pages 5-5); Kallala et al. 2024, DOI: https://doi.org/10.1186/s12903-024-04086-z (kallala2024theassociationbetween pages 4-5)
Epigenetic / transcriptomic findings Experimental evidence indicates dental fluorosis involves broad transcriptomic and epigenetic dysregulation. Rat molar profiling identified Atp2c1 and Nr1d1 as key genes linked to Ca2+ transport, ER stress, and immune regulation; pathways included ion transport, cytokine signaling, NOD-like receptor signaling, and NF-κB-related immune signaling. Specific DNA methylation changes were reported in multiple genes. 1,723 DEGs (1,050 up, 673 down); 2,511 DE-lncRNAs (1,507 up, 1,004 down); 67 significant KEGG pathways; targeted methylation across 409 CpGs/17 genes, with 13 CpG sites significantly changed. Animal model multi-omics (RNA-seq + targeted methylation) Hu et al. 2024, Biol Trace Elem Res, DOI: https://doi.org/10.1007/s12011-023-03660-w (hu2024effectoflong pages 5-7, hu2024effectoflong pages 10-13)
Mechanism / pathophysiology Current mechanistic understanding centers on ameloblast stress biology: excessive fluoride can induce ER stress, disturb Ca2+ homeostasis, increase oxidative stress/ROS, alter autophagy, reduce KLK4/MMP20 synthesis or secretion, and promote ameloblast apoptosis, impairing enamel matrix removal and maturation and leading to porous hypomineralized enamel. Retrieved mechanistic papers provide mainly qualitative mechanistic evidence; no single unifying human effect estimate available. Review; in vitro ameloblast studies; animal multi-omics Zhang et al. 2023, DOI: https://doi.org/10.3389/fcell.2023.1168215 (zhang2023advancesinepidemiological pages 5-5, zhang2023advancesinepidemiological pages 1-2); Wei et al. 2013, DOI: https://doi.org/10.1002/tox.20724; Zhang et al. 2016, DOI: https://doi.org/10.1016/j.archoralbio.2016.05.015; Suzuki et al. 2015, DOI: https://doi.org/10.1016/j.freeradbiomed.2015.08.015 (mechanistic papers listed in conversation)
Diagnostic indices The main clinical indices identified were Dean’s Index and the Thylstrup–Fejerskov (TF) index. Dean’s index remains historically dominant and simple; TF is considered more biologically valid and correlates better with histopathology/enamel fluoride. A simplified TF using six upper anterior teeth performed well in endemic settings. Simplified TF performance: Sensitivity 90.6% (95% CI 86.6–93.6), Specificity 100% (95% CI 95.3–100), PPV 100%, NPV 77.5% (95% CI 69.8–83.5), ROC 0.953 (95% CI 0.933–0.973). Methods/validation studies; classic review; current systematic review Adelario et al. 2010, Int J Environ Res Public Health, DOI: https://doi.org/10.3390/ijerph7030927; Rozier 1994, DOI: https://doi.org/10.1177/08959374940080010901 (rozier1994epidemiologicindicesfor pages 1-2); Fejerskov et al. 1990, DOI: https://doi.org/10.1177/00220345900690s135 (fejerskov1990thenatureand pages 1-2); Gamarra et al. 2024, DOI: https://doi.org/10.1186/s12903-024-04472-7 (gamarra2024associationbetweenfluoride pages 1-2)
Clinical / public-health implications Public-health decisions must balance caries prevention benefits of fluoride against fluorosis risk. Recent US and English data reinforce that fluoride remains protective for caries while higher systemic exposure raises fluorosis odds. Reviews and position statements argue for optimized, not indiscriminate, fluoride use. England ecological study: compared with <0.2 mg/L, CWF prevented 17%–28% of caries across SES groups and 56% of dental extractions. NHANES fluorosis odds increased with higher water/plasma fluoride; supplement use was not significantly associated in the retrieved NHANES analysis. Ecological study; national cross-sectional study; policy statement Roberts et al. 2023, J Public Health, DOI: https://doi.org/10.1093/pubmed/fdac066; Hung et al. 2023, DOI: https://doi.org/10.1001/jamanetworkopen.2023.18406 (hung2023anationalstudy pages 7-8, hung2023anationalstudy pages 1-2); Lee et al. 2025, DOI: https://doi.org/10.18332/popmed/200818
Treatment trials / implementations Evidence in the conversation identifies minimally invasive esthetic management strategies: microabrasion, in-office bleaching, remineralization/CPP-ACFP (MI-Paste Plus), resin infiltration, and combinations of these. These are used mainly for mild–moderate fluorosis. NCT01733888: resin infiltration ± bleaching for fluorosis stains, pediatric population, enrollment 80. NCT05204277: microabrasion (6.6% HCl + silicon carbide), in-office bleaching, MI-Paste Plus; enrollment 16. NCT05051748: 8 minimally invasive protocols including Opalescence Boost 40%, Opalustre microabrasion, MI-Paste Plus; 160 fluorosed teeth, follow-up to 6 months. NCT05339503: microabrasion compounds comparison; enrollment 60. Interventional clinical trials / registry records ClinicalTrials.gov NCT01733888 (NCT01733888 chunk 2); NCT05204277 (NCT05204277 chunk 2); NCT05051748 (NCT05051748 chunk 1, NCT05051748 chunk 2); NCT05339503 (NCT05339503 chunk 2)
Evidence gaps No explicit MONDO/ICD/SNOMED identifiers were found in the retrieved evidence. Genetic findings remain heterogeneous and mostly from candidate-gene studies; strong replication and robust formal GxE analyses are limited in the available excerpts. Mechanistic evidence is richer in cell/animal models than in human tissue studies. Not applicable Synthesis across retrieved evidence Based on retrieved sources only (zhang2023advancesinepidemiological pages 1-2, zhang2023advancesinepidemiological pages 2-3, zhang2023advancesinepidemiological pages 4-5, zhang2023advancesinepidemiological pages 5-5, NCT01733888 chunk 2, NCT05204277 chunk 2, fejerskov1990thenatureand pages 1-2)

Table: This table summarizes the key knowledge-base fields for dental fluorosis using only evidence retrieved in the conversation. It highlights identifiers, epidemiology, mechanisms, genetics, diagnostic indices, and current treatment/public-health evidence with traceable source citations.

Limitations of this report (based on retrieved tool evidence)

  1. Ontology/coding coverage: ICD-10/ICD-11, MONDO, Orphanet, and SNOMED CT identifiers were not present in the retrieved documents and are therefore not asserted here. (NCT05204277 chunk 2, fejerskov1990thenatureand pages 1-2)
  2. QoL evidence (2023–2024): recent QoL systematic review(s) were listed as unobtainable in tool output; consequently QoL is summarized from older retrieved evidence only. (rozier1994epidemiologicindicesfor pages 1-2)
  3. GxE effect sizes: while review text indicates gene–environment interaction studies exist, numeric interaction estimates were not available in the retrieved excerpts; therefore GxE is described qualitatively. (zhang2023advancesinepidemiological pages 4-5)

References

  1. (gamarra2024associationbetweenfluoride pages 1-2): José Gamarra, David Álvarez-Ordaz, Nelly Molina-Frechero, Leonor Sánchez-Pérez, Alberto Pierdant-Rodriguez, Mario Alberto Isiordia-Espinoza, León Francisco Espinosa-Cristóbal, Marcelo Gómez Palacio-Gastelum, Rogelio González-González, José Salas-Pacheco, and Ronell Bologna-Molina. Association between fluoride intake from drinking water and severity of dental fluorosis in northern and western mexico: systematic review and meta-analysis. BMC Oral Health, Jun 2024. URL: https://doi.org/10.1186/s12903-024-04472-7, doi:10.1186/s12903-024-04472-7. This article has 15 citations and is from a peer-reviewed journal.

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