Does Grinding Healthy Upper Teeth for Braces Increase Cavity Risk? - Dentistry

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Braces are placed on the lower teeth but are grinding against the upper teeth?


Hello, doctor.
Today I had a root canal treatment and returned for a follow-up to get a crown.
The crown is for my lower teeth, but it feels too high, and the doctor said I need to grind down my upper teeth since my lower teeth are already too low to grind further.
Will grinding down my originally healthy upper teeth increase the risk of cavities? Thank you.

Niming, 30~39 year old female. Ask Date: 2022/03/26

Dr. Lin Jiayong reply Dentistry


Hello: Does grinding down healthy upper teeth increase the risk of cavities? Yes, it is indeed possible.
Therefore, if it is not absolutely necessary, it is recommended to adjust the dentures rather than the opposing teeth.

Reply Date: 2022/03/26

More Info


Grinding healthy upper teeth to accommodate braces can indeed increase the risk of cavities, and it's important to understand the underlying reasons for this. When a dentist or orthodontist decides to grind down healthy teeth, it is typically done to create space or to ensure a proper bite alignment. However, this procedure can have several implications for dental health.

Firstly, when healthy enamel is ground down, it exposes the underlying dentin, which is more susceptible to decay. The enamel serves as a protective barrier for the teeth, and once it is compromised, the risk of cavities increases significantly. Dentin is softer and less mineralized than enamel, making it easier for bacteria to penetrate and cause decay. Additionally, the grinding process can create rough surfaces on the teeth, which can trap food particles and plaque, further increasing the risk of cavities.

Moreover, grinding can also lead to increased sensitivity in the teeth. This sensitivity can make it uncomfortable for patients to maintain proper oral hygiene, as brushing may become painful. If patients avoid brushing or flossing due to discomfort, this can lead to plaque buildup and, consequently, cavities.

Another consideration is the potential for misalignment of the bite. If the grinding is not done carefully, it can lead to an improper bite, which may cause uneven wear on the teeth and further dental issues down the line. An improper bite can also lead to jaw problems, such as temporomandibular joint (TMJ) disorders, which can cause pain and discomfort.

To mitigate these risks, it is crucial to maintain excellent oral hygiene practices. This includes brushing twice a day with fluoride toothpaste, flossing daily, and using an antibacterial mouthwash to help reduce plaque buildup. Regular dental check-ups are also essential, as they allow for early detection of any issues that may arise from the grinding process.

Additionally, discussing with your orthodontist the possibility of alternative solutions is advisable. For instance, if the grinding is primarily to accommodate the braces, there may be other orthodontic options available that do not require altering healthy teeth. This could include adjustments to the braces themselves or using different types of orthodontic appliances that do not necessitate grinding.

In summary, while grinding healthy upper teeth for braces can be necessary in some cases, it does carry an increased risk of cavities and other dental issues. It is essential to weigh the benefits against the potential risks and to maintain rigorous oral hygiene practices to protect your dental health. Always communicate openly with your dental care providers about your concerns and explore all available options to ensure the best outcome for your oral health.

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