How to Treat Cavities Between Teeth Without Losing a Tooth? - Dentistry

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How can cavities between teeth be treated?


Hello Dr.
Wu, I have a small cavity between my left third molar and second molar, specifically in the interproximal area.
Both of these teeth have been previously restored.
If I need to fill that cavity, how would the dentist proceed? Will it require sacrificing one of the teeth? I'm really worried...

sundry, 20~29 year old female. Ask Date: 2001/02/12

Dr. Wu Jinjun reply Dentistry


The third molar (commonly known as the wisdom tooth) often erupts in an improper direction and position, making oral hygiene difficult between it and the second molar, leading to interproximal caries between these two teeth.
Generally, it is quite challenging to directly restore such cavities, and it is usually necessary to extract the wisdom tooth (since it has no functional purpose) in order to properly restore the cavity in the second molar.

Reply Date: 2001/02/12

More Info


When dealing with cavities between teeth, particularly in the case of your third molar (wisdom tooth) and the second molar, it’s important to understand that treatment options are available that do not necessarily involve sacrificing a tooth. Cavities, especially those located in the interproximal areas (the spaces between teeth), can be challenging to treat, but with modern dental techniques, effective solutions exist.

First and foremost, if you have a cavity between two teeth, the dentist will typically assess the extent of the decay through clinical examination and possibly X-rays. If the cavity is small and has not progressed to the point of affecting the pulp (the innermost part of the tooth containing nerves and blood vessels), the dentist can often treat it with a filling. This process involves the following steps:
1. Anesthesia: The dentist will administer a local anesthetic to numb the area around the affected tooth, ensuring that you do not feel pain during the procedure.

2. Decay Removal: Using a dental drill or laser, the dentist will carefully remove the decayed portion of the tooth. This step is crucial as it prevents further decay and potential infection.

3. Filling the Cavity: After the decay is removed, the dentist will clean the area and fill the cavity with a suitable material. Common filling materials include composite resin (tooth-colored), amalgam (silver-colored), or glass ionomer. The choice of material often depends on the location of the cavity, the extent of decay, and your personal preferences.

4. Polishing: Once the filling is in place, the dentist will polish it to ensure a smooth surface that blends well with the surrounding tooth structure.

In most cases, treating a cavity between teeth does not require sacrificing a tooth. However, if the decay is extensive and has reached the pulp, a root canal treatment may be necessary. This procedure involves removing the infected pulp, cleaning the root canals, and sealing them. Afterward, a crown may be placed on the tooth to restore its function and appearance.

It’s also essential to maintain good oral hygiene to prevent future cavities. This includes:
- Brushing: Brush your teeth at least twice a day with fluoride toothpaste, paying special attention to the areas between your teeth. A soft-bristled toothbrush is recommended to avoid damaging the gums.

- Flossing: Daily flossing is crucial for removing plaque and food particles from between your teeth, where a toothbrush cannot reach effectively. Flossing helps prevent cavities and gum disease.

- Regular Dental Check-ups: Continue your routine dental visits every six months for professional cleanings and examinations. Your dentist can catch any potential issues early, making treatment easier and less invasive.

- Dietary Choices: Limit sugary snacks and drinks, as they can contribute to tooth decay. Instead, opt for a balanced diet rich in fruits, vegetables, whole grains, and dairy products.

In summary, if you have a cavity between your teeth, it is possible to treat it without losing a tooth. Consult with your dentist about the best treatment options for your specific situation. They will guide you through the process and help you maintain your dental health for years to come. Remember, early intervention is key to preserving your teeth and preventing more severe dental issues in the future.

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