# Caries Risk Assessment > Caries risk assessment for NEET-MDS Conservative Dentistry: CAMBRA, Cariogram, saliva rates, diet frequency and recall interval planning. - Canonical URL: https://prepelephant.com/topics/neet-mds/conservative-dentistry/caries-risk-assessment-mds - Exam / course: NEET-MDS · Subject: Conservative Dentistry - Publisher: PrepElephant (https://prepelephant.com) — Prepared and reviewed by the PrepElephant Academic Review Team - First published: 2026-10-02 - Last updated: 2026-10-02 - How to cite: "Caries Risk Assessment", PrepElephant, https://prepelephant.com/topics/neet-mds/conservative-dentistry/caries-risk-assessment-mds ## Direct answer Risk assessment sorts every patient into low, moderate or high caries risk before deciding recall intervals, fluoride intensity and restorative strategy — because restorations fail in high-risk mouths regardless of material. The two named systems are CAMBRA (Caries Management by Risk Assessment, with its disease indicators, risk factors and protective factors) and the Cariogram, a Swedish software model by Bratthall that expresses ten interacting factors as a "chance of avoiding new lesions" sector diagram. High-risk markers the exam expects verbatim: two or more new lesions in the last twelve months, stimulated saliva flow below about 0.7 ml per minute, frequent between-meal sugar exposure, low fluoride exposure, and medical states such as xerostomia or radiation therapy. ## What you must remember - **CAMBRA triad:** disease indicators (new lesions in 12 months, active white spots, lesions within a year of restoration), risk factors (diet frequency above three sugar exposures daily, Streptococcus mutans and lactobacilli counts, poor plaque control, xerostomia), protective factors (fluoride exposure, saliva, antibacterial therapy). - **Cariogram sectors:** diet, bacteria, susceptibility and circumstances combine into a pie whose green sector is the chance of avoiding new caries — the only interactive validated model commonly quoted. - **Saliva thresholds:** unstimulated flow below roughly 0.1-0.2 ml per minute or stimulated flow below 0.5-0.7 ml per minute defines hyposalivation and pushes the patient into high risk. - **Buffering capacity and bacterial counts** (mutans streptococci, lactobacilli on dip-slide tests) are the laboratory arm of risk assessment. - **Recall intervals follow risk:** high risk three months, moderate six months, low risk twelve months or longer — the NICE recall guidance range of 3-24 months is the quoted convention. - **High-risk intervention package:** fluoride varnish 5 per cent sodium fluoride (22,600 ppm) two to four times yearly, chlorhexidine gel courses where indicated, diet counselling, and glass ionomer sealants in stagnation zones. - **Social and medical determinants matter:** socioeconomic status, disability, orthodontic appliances, Sjögren syndrome, diabetes and anti-cholinergic drugs all shift the category. ## Triaging a returning patient A 30-year-old teacher returns with five new lesions in a year, one under a two-year-old composite. Work the domains: diet diary reveals six sugar exposures including sweetened coffee hourly; stimulated saliva measures 0.5 ml per minute with low buffering; plaque index poor; no fluoride beyond toothpaste. CAMBRA classifies extreme/high risk, the Cariogram's green sector would sit under 20 per cent. The plan then writes itself in the order the viva wants: control the bacterial load first — chlorhexidine gel and plaque control; correct the saliva-diet axis — diet counselling targeting frequency not quantity, sugar-free chewing gum for stimulation; harden the teeth — 22,600 ppm varnish three-monthly plus 5,000 ppm fluoride toothpaste at home; restore with glass ionomer or high-fluoride-releasing materials where margins sit in plaque stagnation zones; and re-evaluate at three months with new lesion count as the outcome measure. Note the teaching point: the composite did not fail because it was composite — it failed because the mouth was a caries-active environment, and every subsequent restoration would share that fate until the risk category moved. ## How the exam frames it NEET-MDS stems usually ask which single finding pushes a patient from moderate to high risk — the safest answer is "two or more new lesions in twelve months", because demonstrated disease outranks any laboratory number. The Cariogram appears as a match-the-following question on its ten factors, so learn the four domains: diet, bacteria, susceptibility, circumstances. A favourite negative stem: "which is NOT a caries risk factor" with fluoride exposure as the answer. Indian exam convention also expects the microbiology pairing — Streptococcus mutans for initiation, Lactobacillus for progression — imported from oral microbiology into risk assessment answers. Finally, remember that recall interval is an output of risk assessment, not a default six-month habit; saying "every patient six months" loses the modern-practice mark. ## Frequently asked questions ### Which single indicator most strongly suggests high caries risk? Two or more new lesions (including root or secondary caries) within the past twelve months — demonstrated disease beats every surrogate measure. ### What does the Cariogram display? A sector diagram where the green sector shows the per cent "chance of avoiding new caries", computed from ten diet, bacteria, susceptibility and circumstance factors. ### What saliva flow rates define hyposalivation? Unstimulated flow below about 0.1-0.2 ml per minute or stimulated flow below 0.5-0.7 ml per minute, commonly quoted thresholds in risk assessment texts. ### How does risk category change the recall interval? High-risk patients are reviewed at about three months, moderate at six, and low-risk patients may extend to twelve months or beyond per individualised recall guidance. ### Which bacteria dominate initiation versus progression of caries? Streptococcus mutans drives initiation and enamel lesions, while lactobacilli dominate the acidic, progressive dentine lesion environment.