When most people think of cavities, they imagine small holes on the top surfaces of their teeth, where food and plaque can easily collect. But did you know that cavities form on the sides of your teeth as well? At Sunshine Dentistry in Richmond Hill, Ontario, understanding how tooth decay can impact your smile is crucial for prevention and maintaining long-term oral health.
Where Can Cavities Form on the Sides of Your Teeth?
The outer surfaces of your teeth are not the only places at risk. Cavities form on the sides of your teeth (also known as interproximal cavities or smooth surface cavities) in the hard-to-reach areas between neighboring teeth. These spots are particularly vulnerable because they are difficult to clean thoroughly with brushing alone, and they frequently harbor food particles and bacteria that contribute to tooth decay.
Interproximal cavities can affect anyone, regardless of age or oral hygiene habits, particularly if flossing is neglected or teeth are crowded together. Sunshine Dentistry provides regular dental checkups to detect and address these hidden threats early on.
Why Do Cavities Form on the Sides of Your Teeth?
Cavities form on the sides of your teeth for several reasons:
- Plaque Accumulation: Plaque is a sticky film of bacteria that constantly forms on your teeth. When you don’t remove it, especially between teeth, the bacteria produce acids that erode enamel.
- Neglected Flossing: Toothbrush bristles cannot reach the small spaces between your teeth. Flossing is critical for removing trapped debris and preventing decay in these areas.
- Dietary Choices: Sugary and starchy foods stick to teeth and provide food for bacteria, increasing the risk that cavities form on your teeth.
- Tooth Alignment: Crowded or misaligned teeth can allow plaque to accumulate in more areas, making cleaning more difficult and increasing the risk of decay.
Symptoms: How to Tell If Cavities Form on the Sides of Your Teeth
Unlike cavities on the biting surface, you might not notice interproximal cavities right away. That’s because cavities that form on the sides of your teeth usually start small and are hidden from view. However, some signs may include the following:
- Tooth sensitivity to sweet, hot, or cold foods and beverages.
- Pain when biting down or chewing.
- Noticeable discoloration or a shadow between teeth.
- Soreness or discomfort localized to one area of your mouth.
- Food often gets stuck between certain teeth.
If you suspect that cavities form on the sides of your teeth, don’t wait for pain. Early detection is crucial for preventing further damage.
Diagnosis: How Dentists Detect Cavities That Form on the Sides of Your Teeth
At Sunshine Dentistry in Richmond Hill, we use digital X-rays and thorough visual examinations to detect cavities that you cannot see. X-rays are especially useful for detecting cavities that form between your teeth because they allow us to see between them and determine the extent of decay. Regular dental exams every six months ensure that cavities are detected and treated before they cause serious problems.

Treatment Options When Cavities Form on the Sides of Your Teeth
If cavities form side your teeth, your dentist will recommend the most appropriate treatment based on the severity of the decay:
1. Dental Fillings
For minor or moderate cavities, the decayed portion is removed and filled with a tooth-colored composite resin. This restores the tooth’s shape and function while blending in seamlessly with your smile.
2. Dental Crowns
If the cavity is large or the tooth is weak, a crown may be required to completely cover and protect the remaining tooth structure.
3. Root Canal Therapy
If decay has reached the nerve of a tooth, root canal treatment is necessary to save the tooth and avoid infection.
Prevention: How to Stop Cavities Form on the Sides of Your Teeth
The best way to prevent cavities that form on your teeth is to combine professional care with diligent at-home habits:
- Floss Daily: Flossing removes plaque and food particles between teeth that your toothbrush cannot reach.
- Brush Twice a Day: Use fluoride toothpaste and a soft-bristled brush to gently clean all surfaces of your teeth.
- Regular Dental Visits: Professional cleanings and exams at Sunshine Dentistry detect problems early on, and fluoride treatments can strengthen enamel.
- Healthy Diet: Limit sugary snacks and beverages. Choose water, fresh fruits, and vegetables as snacks.
- Consider Dental Sealants: In some cases, sealants can be applied to protect the sides of your teeth from decay, especially in children and teens.

Why Choose Sunshine Dentistry?
At Sunshine Dentistry in Richmond Hill, Ontario, we are committed to your overall oral health, not just the visible surfaces. We use cutting-edge technology and preventive strategies to detect, treat, and help you avoid cavities that form around your teeth. Our caring, professional staff will guide you through every step of your dental care, helping you maintain a healthy smile for life.
FAQs
Can cavities form on the sides of your teeth even if I brush every day?
Yes, cavities can form on the sides of your teeth if you do not floss regularly. Brushing does not reach between teeth, so flossing is necessary to clean those areas.
Are cavities between teeth more serious than other cavities?
They can become more serious if not detected early, as they’re harder to spot and can progress before any symptoms are noticed.
How often should I get checked for cavities that form on the sides of your teeth?
We recommend getting a dental checkup every six months. Regular X-rays and exams help detect cavities that form on the sides of your teeth early.
Will a filling between my teeth look obvious?
No, modern composite fillings are tooth-colored and designed to blend in with your natural teeth, so they are not noticeable.
Can children get cavities that form on the sides of their teeth?
Absolutely. In fact, children are often at a higher risk because they do not floss effectively. Early dental visits and proper oral hygiene are essential.
Schedule Your Checkup Today
Don’t let hidden decay damage your smile. If you’re concerned about whether cavities form on the sides of your teeth or if it’s been a while since your last dental exam, contact Sunshine Dentistry in Richmond Hill, Ontario, today. Our experienced team is here to help you achieve and maintain a healthy, cavity-free smile!