When most people picture a cavity, they imagine a dark spot or small hole on the chewing surface of a tooth. However, cavities can develop almost anywhere bacteria and plaque are able to collect, including the tight spaces between your teeth.
These cavities are often called interproximal cavities. Because they form where two teeth meet, they can be difficult to see and may not cause obvious symptoms during their early stages. By the time you notice sensitivity or discomfort, the decay may already require treatment.
At Northern Niagara Dentistry, regular dental exams, professional cleanings, and appropriate dental X-rays help us identify decay that may be difficult to spot at home. Understanding why cavities develop between teeth can also help you take steps to prevent them.
Why Do Cavities Develop Between Teeth?
Cavities develop when bacteria in dental plaque interact with sugars and carbohydrates from the foods and drinks you consume. This process produces acids that can gradually weaken tooth enamel.
The spaces between teeth are particularly vulnerable because toothbrush bristles cannot always reach these areas effectively. If plaque remains trapped between teeth, repeated acid exposure can eventually damage the enamel and create a cavity.
This is one reason brushing alone is not enough for complete oral hygiene. Cleaning between your teeth with dental floss or another recommended interdental cleaner helps remove plaque from areas your toothbrush may miss.
Regular dental cleanings are also important. Once plaque hardens into tartar, it cannot be removed effectively with regular brushing and flossing at home.
Diet can also influence cavity risk. Frequently sipping sugary beverages or snacking throughout the day repeatedly exposes teeth to acids. Dry mouth may increase the risk as well because saliva helps wash away food particles and neutralize acids.
What Are the Signs of a Cavity Between Your Teeth?
One of the challenges with cavities between teeth is that they may produce few or no symptoms when they are small.
As the cavity becomes larger, you might begin to notice sensitivity when eating or drinking something cold, hot, or sweet. Some patients experience discomfort when biting or chewing. Food may also start getting caught repeatedly in the same area.
Other possible signs include persistent bad breath, floss that regularly catches or tears between particular teeth, or a dark area that becomes visible as decay progresses.
However, you should not wait for symptoms before seeing a dentist. A cavity can develop without causing pain, especially while decay remains limited to the outer enamel.
Routine dental examinations give your dentist an opportunity to identify early changes before they become larger problems.
How Does a Dentist Find a Cavity Between Teeth?
Cavities on visible tooth surfaces can sometimes be identified during a clinical examination. Cavities between teeth can be harder to detect because the neighbouring tooth may block the dentist’s view.
Dental X-rays can be particularly useful in these situations. Bitewing X-rays allow dentists to examine areas between the back teeth and identify changes that may indicate decay.
Your dentist will consider the examination findings, X-rays when appropriate, symptoms, and your dental history before recommending treatment.
Finding a cavity early can make an important difference. Very early enamel changes may sometimes be managed with preventive strategies. Once decay creates a cavity that cannot repair itself, a restoration is usually required.
Regular exams are therefore not only about finding problems that already hurt. They are also an opportunity to identify hidden concerns while treatment may still be relatively straightforward.
How Are Cavities Between Teeth Treated?
Treatment depends on how far the decay has progressed.
For many small to moderate cavities, the damaged portion of the tooth can be removed and replaced with a tooth-coloured dental filling. The filling restores the shape of the tooth and helps protect it from additional damage.
If decay has destroyed a larger portion of the tooth, a traditional filling may not provide enough strength. Depending on the location and extent of the damage, your dentist may recommend inlays or onlays. These custom restorations can provide additional support while preserving healthy natural tooth structure.
A tooth that has become significantly weakened may require a dental crown to restore its strength and function.
If decay reaches the inner pulp of the tooth, bacteria can cause inflammation or infection. At this stage, additional treatment may be necessary to save the tooth.
This is why treating cavities early is generally preferable. Smaller cavities typically require less extensive treatment and allow more of the natural tooth to be preserved.
Can Cavities Between Teeth Be Prevented?
While no prevention strategy can guarantee that you will never develop a cavity, good daily oral hygiene can significantly reduce your risk.
Brush twice each day with fluoride toothpaste, paying attention to every surface of your teeth and the gumline. Just as importantly, clean between your teeth every day. Traditional dental floss works well for many patients, although interdental brushes, floss picks, or water flossers may be appropriate in certain situations.
Your diet also matters. Frequent exposure to sugary foods and drinks gives cavity-causing bacteria more opportunities to produce acid. Limiting how often you consume these products can help protect your enamel.
Professional cleanings and routine dental examinations provide another layer of prevention. Your dental team can remove buildup you cannot clean at home, identify areas where plaque tends to accumulate, and recommend changes to your oral hygiene routine.
Patients with crowns, bridges, or other restorations should pay particular attention to cleaning between their teeth. Plaque can collect around the edges of restorations just as it does around natural teeth.
Why You Should Not Ignore Tooth Sensitivity
A little sensitivity may seem harmless, but recurring discomfort in one particular area deserves attention. Sensitivity does not automatically mean you have a cavity. Gum recession, worn enamel, cracks, grinding, and other dental conditions can produce similar symptoms.
The only reliable way to determine the cause is through a dental assessment.
Waiting until a tooth becomes severely painful can limit your treatment options. If a cavity continues to grow, it can eventually weaken the tooth or reach its nerve.
If you develop sudden or severe pain, swelling, or another urgent problem, emergency dental care may be necessary.
Protect Your Teeth with Northern Niagara Dentistry
Cavities between teeth can be difficult to see, but regular dental care can help identify them before they cause significant damage. If you have noticed sensitivity, discomfort when chewing, food repeatedly getting caught between your teeth, or you are simply due for a dental exam, Northern Niagara Dentistry is here to help. Our St. Catharines dental team can evaluate your teeth and recommend treatment based on your individual needs. Contact Northern Niagara Dentistry or call (905) 934-2361 to schedule your appointment and take the next step toward protecting your smile.
Frequently Asked Questions
1. Can you see a cavity between your teeth?
Not always. Cavities between teeth can remain hidden from view, particularly during their early stages. Dental X-rays may help your dentist detect decay in areas that cannot be seen easily during a visual examination.
2. Why do I keep getting cavities between my teeth?
Plaque can easily accumulate between teeth because toothbrush bristles do not completely clean these spaces. Infrequent flossing, frequent sugar exposure, dry mouth, and individual cavity risk can also contribute.
3. Can flossing prevent cavities between teeth?
Daily flossing can reduce the risk by removing plaque and food debris from areas between teeth. It should be combined with twice-daily brushing, fluoride toothpaste, regular dental exams, and professional cleanings.
4. Does a cavity between teeth always need a filling?
Not necessarily. Very early enamel changes may sometimes be managed with preventive care and fluoride. Once a true cavity has formed, however, restorative treatment is generally needed. Your dentist can determine the appropriate treatment after an examination.
5. What happens if a cavity between two teeth is not treated?
Untreated decay can continue deeper into the tooth, causing sensitivity, pain, infection, and weakening of the tooth structure. Early treatment can often prevent the need for more extensive dental procedures.