How to Tell if You Have a Cavity Between Your Teeth

June 1, 2025

Filed under: Uncategorized — joshuahong @ 9:11 pm
Cartoon of two teeth; one healthy, one with cavity

Cavities are a common dental issue, but when they form between your teeth, they can be especially sneaky. These interproximal cavities—so named because they occur in the spaces between two teeth—aren’t always visible to the naked eye. That means you could have one developing without even realizing it.

Fortunately, there are ways to spot the warning signs and lower your risk of needing more serious treatment down the line.

Why Cavities Between Teeth Are Hard to Detect

Unlike cavities on the biting surface of a tooth, cavities between teeth are hidden by the surrounding enamel and the adjacent tooth. You might not see them when brushing or even notice any discomfort in the early stages. They often go undetected until your dentist takes X-rays during a routine exam.

That’s one reason why keeping up with regular dental checkups is so important. These appointments allow your dentist to catch small cavities between teeth before they turn into bigger problems.

Common Signs of a Hidden Cavity

Even though they can be tough to spot, there are still a few symptoms that might suggest a cavity between your teeth is forming:

  • Sensitivity to hot, cold, or sweet foods and drinks
  • Discomfort when chewing or biting down
  • Bad breath that doesn’t improve with brushing
  • A dull ache or intermittent pain in a specific area
  • Food frequently getting stuck between certain teeth

If you notice one or more of these signs, it’s a good idea to schedule an exam. The earlier a cavity is caught, the easier and less invasive the treatment will be.

How Dentists Diagnose and Treat These Cavities

To confirm whether you have a cavity between your teeth, your dentist will likely take bitewing X-rays. These detailed images help reveal any decay that can’t be seen with a visual inspection.

If decay is detected, treatment will depend on how far the cavity has progressed. A small cavity can usually be treated with a simple dental filling. If the decay has reached the inner part of the tooth or affected the neighboring tooth as well, a more extensive restoration—like a dental crown or even a root canal—may be necessary.

Tips to Prevent Cavities Between Teeth

The best way to deal with interproximal cavities is to prevent them in the first place. Here’s how:

  • Floss daily to remove plaque and food particles between your teeth
  • Use a fluoride toothpaste and brush at least twice a day
  • Avoid sugary snacks and drinks that feed cavity-causing bacteria
  • Drink plenty of water to rinse away debris and stimulate saliva production
  • Visit your dentist every six months for cleanings and X-rays

Good oral hygiene habits go a long way toward keeping hidden cavities at bay.

Just because you can’t see a cavity doesn’t mean it isn’t there—staying vigilant and proactive can help you catch the signs early.

About the Practice

Dr. Hong and Dr. Goodman of Goodman Dental Restorative & Aesthetic Dentistry take a thorough, preventive approach to your oral health. Our friendly team offer advanced restorative dentistry services to catch and treat issues like hidden cavities before they worsen. Using digital X-rays and minimally invasive techniques, we help you maintain a healthy, confident smile for years to come.

Call us at (623) 925-8822 or request an appointment online.