UCSF Protocol · Evidence-Based · ADA-Endorsed · Caries Prevention

CAMBRA Caries Risk Assessment — 3-Domain Score & Management Protocol

Caries Management by Risk Assessment — UCSF/ADA protocol. Score disease indicators, biological risk factors, and protective factors to classify caries risk and generate an individualised evidence-based management plan for adult and adolescent patients.

Based on UCSF CAMBRA Protocol  ·  Updated Jul 26, 2026
This calculator supplements, but never replaces, clinical judgment. Results should be interpreted by a licensed dental clinician alongside a full clinical and radiographic examination.
Low Low Risk 12-month recall
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Mod Moderate Risk 6-month recall
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High High Risk 3-month recall
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Ext Extreme Risk Sjögren / XRT
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3 + 8 Domains Indicators · Risks · Protective
Disease Indicators 0 /5
Risk Factors 0 /12
Protective Factors 0 /8
Risk Level Low
Section 1 — Disease Indicators
Any indicator present = High Risk minimum regardless of other sections
Section 2 — Biological Risk Factors
Factors that tip balance toward disease — count increases risk level
HIGH
HIGH
MED
MED
MED
HIGH
HIGH
MED
HIGH
EXTREME
HIGH
MED
Section 3 — Protective Factors
Factors that tip balance toward health — more = lower risk

CAMBRA Risk Classification — Management Protocols

Risk LevelDisease indicatorsKey featuresRecallFluorideBacterial testing
Low None in 3 years No significant risk factors, adequate protective factors 12 months Standard fluoride toothpaste Not indicated
Moderate None in 3 years Some risk factors but no cavitated lesions 6 months 5,000 ppm Rx fluoride OR varnish 2×/year Consider
High Cavitated/radiographic lesions present Active disease indicators, multiple risk factors 3 months 5,000 ppm Rx fluoride daily + varnish 4×/year Recommended (MS/LB)
Extreme Active lesions + salivary dysfunction Sjögren syndrome, head/neck XRT, flow <0.1 mL/min 1–3 months 5,000 ppm Rx fluoride + NaF varnish + MI Paste Essential (MS/LB)

Anticariogenic Interventions by Risk Level (CAMBRA Protocol)

InterventionLowModerateHighExtreme
Fluoride varnish—2×/year4×/yearEvery 1–3 months
Rx fluoride 5,000 ppm toothpaste—ConsiderDailyDaily (essential)
Chlorhexidine 0.12% rinse—Consider 1 week/month1 week/month × 3 cycles1 week/month ongoing
Xylitol gum/mints ≥6g/dayEncouragedYesYes (essential)Yes (essential)
Saliva substitutes/stimulants—If xerostomiaYesEssential
MI Paste Plus (CPP-ACP)—ConsiderYesYes (essential)
Bacterial count test (MS/LB)—ConsiderYesEssential
Dietary analysis and counsellingBasicTargetedComprehensiveComprehensive
Sealants (at-risk fissures)—ConsiderYesYes

What Is CAMBRA?

A 34-year-old patient returns for a routine recall exam after two years away from the practice. The bitewings show a new interproximal radiolucency on tooth #14, plaque is visible along the gingival margin of the lower anteriors, and the patient reports grazing on sweetened coffee and snacks throughout the workday. Nothing here is dramatic enough for an emergency visit — but taken together, these findings say a great deal about where this patient sits on the caries risk spectrum, and what should happen next. CAMBRA (Caries Management by Risk Assessment) is the structured, evidence-based protocol dentistry uses to answer exactly that question, rather than relying on gut feeling alone. It was developed by John D.B. Featherstone, PhD and colleagues at the University of California, San Francisco (UCSF) School of Dentistry, with consensus papers published in the Journal of the California Dental Association in 2003 and 2007 and validated in large prospective studies since. The American Dental Association (ADA) has endorsed the CAMBRA framework as the evidence-based standard for individualised caries management across all age groups. This calculator applies the same three-domain structure taught in US dental schools; for a broader picture of a patient's oral health status alongside caries risk, pair it with the Periodontal Staging and Grading Calculator.

The CAMBRA Paradigm: Balance of Disease and Protection

The central concept of CAMBRA is that dental caries is a bacterial infectious disease driven by an imbalance between pathological factors (cariogenic bacteria, fermentable carbohydrates, reduced salivary flow) and protective factors (fluoride, saliva, good oral hygiene, dietary control). CAMBRA frames caries management as restoring this balance rather than simply drilling and filling. The three-domain assessment — disease indicators, risk factors, and protective factors — quantifies where each patient sits on this balance scale.

Why Disease Indicators Automatically Determine High Risk

In the CAMBRA system, the presence of any disease indicator (cavitated lesion, radiographic interproximal lesion, or white spot lesion detected in the past 3 years) immediately classifies the patient as High Risk or above — regardless of the protective factors present. This is because these indicators represent active or recent disease, confirming that the pathological factors have overcome the patient's protective capacity. Protective factors can then shift the patient from the management protocol for High Risk toward more intensive prevention rather than changing the risk classification itself.

Extreme Risk — Salivary Dysfunction

Extreme Risk is reserved for patients with severely compromised salivary function: unstimulated flow rate below 0.1 mL/min, Sjögren syndrome, or head and neck radiation therapy affecting the major salivary glands. These patients have lost their most important protective factor entirely and require the most intensive preventive protocol — 5,000 ppm fluoride daily, fluoride varnish every 1–3 months, chlorhexidine, MI Paste Plus, saliva substitutes, and bacterial count testing. Even a single restoration without addressing the underlying salivary dysfunction will fail.

Clinical Significance

CAMBRA matters because caries risk, unlike a caries diagnosis, is forward-looking — it tells the clinician what is likely to happen next, not just what has already happened. Two patients can arrive with an identical number of restorations and very different trajectories: one stable for a decade, the other accumulating new lesions every recall. Risk-based classification lets recall intervals, fluoride intensity, and adjunctive therapies like chlorhexidine or MI Paste be matched to actual trajectory rather than applied uniformly. This is also why CAMBRA has become a documentation standard: payers and specialists increasingly expect a stated risk level, not just a treatment plan, in the chart.

When to Use This Calculator

Use CAMBRA at every new patient exam, at recall visits for existing patients, and any time a patient's medical or medication history changes in a way that could affect salivary function or bacterial load — starting xerostomic medications, beginning chemotherapy or head/neck radiation, or developing an eating disorder or uncontrolled diabetes, for example. It is also appropriate before placing orthodontic appliances, prosthetic work, or any restoration where a stable oral environment is assumed, since restorative work performed on an unassessed high-risk mouth is a common cause of early restoration failure.

References

  • Featherstone JDB, et al. Caries Management by Risk Assessment: Consensus Statement. J Calif Dent Assoc. 2007;35(10):703–713. PubMed
  • Featherstone JDB, et al. Caries risk assessment in practice for age 6 through adult. J Calif Dent Assoc. 2007;35(10):703–707. PubMed
  • Ramos-Gomez FJ, et al. Caries risk assessment appropriate for the age 1 visit. J Calif Dent Assoc. 2007;35(10):687–702. PubMed
  • Chaffee BW, et al. Baseline caries risk assessment as a predictor of caries incidence. J Dent. 2015;43(5):518–524. PubMed

Related Dental Calculators

This tool approximates the UCSF CAMBRA chairside form for educational and triage purposes. It supplements, but never replaces, clinical judgment or a full clinical and radiographic examination by a licensed dental clinician.
Source: CAMBRA Protocol (UCSF) Featherstone et al., J Calif Dent Assoc 2007 · View protocol

Frequently Asked Questions

What does CAMBRA stand for and who developed it?
CAMBRA stands for Caries Management By Risk Assessment. It was developed by John D.B. Featherstone, PhD and colleagues at the University of California, San Francisco (UCSF) School of Dentistry. The foundational consensus papers were published in the Journal of the California Dental Association in 2003 and 2007, and the protocol is now endorsed by the ADA and taught in most US dental schools as the standard for individualised caries risk management.
What is the difference between High and Extreme CAMBRA risk?
High Risk patients have active caries experience (cavitated or radiographic lesions) or multiple significant biological risk factors without adequate protective factors. Extreme Risk is a separate category reserved specifically for patients with severely compromised salivary function — unstimulated flow below 0.1 mL/min, Sjögren syndrome, or head and neck radiation therapy. These patients face catastrophic caries progression because saliva — the primary natural defence mechanism — is largely or entirely absent. Extreme Risk requires the most intensive preventive protocol available.
If I have protective factors, can they lower me from High to Moderate risk?
No — protective factors cannot change the risk classification if a disease indicator is present. A cavitated lesion, radiographic interproximal lesion, or white spot lesion in the past 3 years automatically places the patient in High Risk or above regardless of protective factors. However, strong protective factors (daily prescription fluoride, adequate saliva, xylitol use) do shift the management protocol intensity within the High Risk category — the patient may require less aggressive or shorter-duration bacterial suppression than a High Risk patient with no protective factors.
How often should CAMBRA be performed?
CAMBRA should be performed at every new patient exam and updated at each recall visit. Risk level can change — a High Risk patient who achieves good plaque control, uses prescription fluoride consistently, and has no new lesions for 3 years may be reclassified as Moderate Risk. Conversely, a Low Risk patient who develops xerostomia from new medication or undergoes chemotherapy should be immediately reassessed and reclassified. CAMBRA is a dynamic tool, not a one-time assessment.
Does CAMBRA replace clinical judgment or a full periodontal and caries exam?
No. CAMBRA is a structured risk-stratification aid, not a diagnostic substitute. It should be used alongside a full clinical and radiographic exam, and results should be interpreted by a licensed dental clinician — not acted on independently by a patient using this calculator at home.