How likely are you to get a cavity?

This calculator applies risk multipliers from published epidemiological research to estimate relative cavity risk compared to the adult population. It is not a clinical assessment and cannot detect existing decay. Actual cavity risk depends on factors this calculator does not capture, including genetics, saliva flow rate, specific bacterial load, enamel depth, and the fluoride content of your local water supply. The result gives you a population-based comparison of your modifiable habits, not a diagnosis or a dental examination substitute. Only a dentist examining your teeth with X-rays can confirm whether you have active decay.

Only at the earliest stage. When decay is confined to the outer enamel layer, remineralisation is possible: the tooth can re-absorb calcium and phosphate minerals from saliva, particularly in the presence of fluoride. Fluoride varnish applications and casein phosphopeptide-based products can facilitate this process. Once decay reaches the dentine layer beneath the enamel, the structural damage is permanent and requires restorative treatment. The clinical window for non-invasive management is early enamel caries, typically identified on X-rays before the patient is aware of it, which is why regular check-ups are clinically valuable.

A Cochrane Review of 56 randomised controlled trials found that powered toothbrushes with oscillating-rotating action reduced plaque by 21% more and gingivitis by 11% more than manual brushing after three months. The direct evidence on caries reduction is harder to establish in short-duration trials, but the mechanism is plausible. The practical consideration is technique and time: an electric toothbrush used for the full 2 minutes removes more plaque than a manual brush used for the average 45 seconds of actual brushing time. For someone who already brushes thoroughly for 2 minutes, the incremental benefit of switching is smaller. Oral-B and Quip are commonly used oscillating electric options.

Cavities between teeth (interproximal caries) cannot be reached by a toothbrush regardless of brushing technique. These surfaces account for a significant proportion of adult caries. Flossing disrupts the interproximal biofilm and removes food debris from these contact points. A Waterpik water flosser is an effective alternative for people who find string flossing difficult. The ADA acknowledges that the clinical trial evidence for flossing's direct impact on caries is weaker than the mechanistic reasoning would suggest, partly because long-duration caries trials are expensive. The recommendation to floss daily is based on plaque removal efficacy and is consistent across dental professional bodies globally.

The 25% untreated decay figure primarily reflects access barriers rather than clinical failure. NHANES data shows that untreated decay rates are significantly higher in lower-income and uninsured populations. Adults without dental insurance are approximately 2.5 times more likely to have untreated decay than those with coverage. The US dental care system is not structured as a primary care or public health service in the way that medicine is in many countries, meaning that preventive and restorative dental care remains inaccessible for a substantial portion of the population on cost grounds alone.

Both are risk factors, but drinks present a specific additional risk because they are often sipped continuously throughout the day, maintaining oral pH below the critical threshold for enamel dissolution for extended periods. A single chocolate bar eaten at a meal produces a shorter, more contained acid exposure than a 500ml sugary drink sipped over two hours. Research consistently shows that sipping frequency is a stronger predictor of caries incidence than total sugar quantity. Sugar-sweetened beverages have been independently associated with a 2 to 3x increase in caries risk in observational studies. Citric acid in many fizzy drinks adds an additional erosive component beyond the cariogenic effect of the sugar.

The traditional every-6-months guideline is not universally evidence-based. A Cochrane Review found insufficient evidence that biannual visits are more effective than risk-stratified intervals for all patients. Current ADA guidance recommends recall intervals set by the dentist based on individual caries risk: low-risk patients may be seen annually; high-risk patients benefit from 3 to 6 monthly reviews. The key benefit of regular professional visits is early detection of decay when it is still in the enamel layer, allowing non-invasive management, plus professional cleaning that removes calculus (hardened plaque) that brushing cannot address. A visit gap of more than 2 years is associated with significantly higher rates of untreated decay reaching the dentine or pulp.

Fluoride is the active ingredient that provides the caries-preventive benefit of toothpaste. Non-fluoride toothpaste removes plaque mechanically but does not provide the remineralisation benefit that makes fluoride toothpaste substantially more effective. The evidence base for fluoride in caries prevention is among the strongest in preventive medicine: fluoride makes enamel more resistant to acid by forming fluorapatite, inhibits Streptococcus mutans metabolism, and promotes remineralisation of early lesions. Current ADA guidance recommends fluoride toothpaste for all ages, including children. Adults should use 1,000 to 1,500 ppm fluoride toothpaste, which covers all mainstream brands. Prescription-strength fluoride (5,000 ppm) is available for high-risk individuals.