Can you get cavities even when you brush every day?

Published October 20, 2026

In short

Yes, you can. Brushing lowers risk but does not remove it, because cavities depend on several things at once: how often sugars and acids reach the teeth, how much saliva you have and what it contains, whether fluoride is present, whether plaque is removed between the teeth and in grooves a brush misses, and the shape and history of your teeth. Brushing twice a day with fluoride toothpaste is necessary but not sufficient, and a caries risk assessment at the dental exam identifies which other factors are driving decay for you.

The risk-factor table

FactorWhy it mattersWhat helps
Frequency of sugars and acidsEach exposure starts an acid attack (IQWiG)Fewer exposures; sugars with meals
Dry mouth and medicationsLess saliva to buffer and repairPhysician review; fluoride; sips of water (NIDCR)
Low fluoride exposureLess repair of early damageFluoride toothpaste; varnish or prescription paste if advised
Skipped interdental cleaningBrush misses between teethFloss or interdental brushes daily
Deep groovesPlaque trapsSealants where appropriate (FDA)
Exposed rootsSofter surfaceFluoride; gentle brushing
Existing restorationsMargins trap plaqueClean margins; risk-based x-rays
AppliancesPlaque retentionExtra cleaning
Brushing technique and timingMissed areas; brushing right after acidTwo minutes, soft brush; wait after acid

What a caries risk assessment does

The dentist combines your history, diet, saliva, fluoride use and examination into a risk level and a plan: which preventive products, how often to check, and whether early lesions can be arrested rather than filled.

Rinsing after brushing

Spitting without rinsing keeps fluoride on the teeth longer; many dentists suggest it.

Questions to ask

What is my risk level, and why? Which factor matters most for me? Which products do you recommend? How often should I have bitewing x-rays? The studio lists hygiene visits among its services (studio).

Next step: Request a consultation or call (805) 565-5111. A request is not a confirmed appointment; the office confirms times during its listed hours (Monday to Thursday, 8 am to 5 pm, plus select Fridays).

Personal risk-factor checklist

FactorApplies to me?Change I will make
Snacks or sweet drinks between meals
Dry mouth or medications
No fluoride toothpaste, or rinsing it off
Not cleaning between teeth daily
Deep grooves or exposed roots
Appliances or many restorations

Risk level from my dentist: ________ Products advised: ________

Next step

Guides are general education; an examination is needed for individual advice.

Sources

  1. Overview: Tooth decay (InformedHealth.org, updated Sep 2023) — Institute for Quality and Efficiency in Health Care (IQWiG)
  2. Oral Hygiene — National Institute of Dental and Craniofacial Research
  3. Treatment Options for Dental Caries — U.S. Food and Drug Administration
  4. Loul Dental Studio: Services — Loul Dental Studio

Sources were current when this guide was last updated.

Educational content, not a diagnosis. Please contact the studio to discuss your own situation.

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