Dental crowns are a common solution for restoring damaged or decayed teeth, offering a long-lasting and aesthetically pleasing option for those with broken or weakened teeth. Many people are concerned about whether crowns can contribute to bad breath. Let’s explore whether crowns can cause bad breath and what you can do to prevent it!
What Is a Dental Crown?
A dental crown is a cap that covers a damaged tooth to restore its shape, size, and function. Crowns can be made from various materials, including porcelain, metal, or a combination of both. They are typically used after a root canal treatment, to cover a large cavity, or to strengthen a tooth that has been significantly worn down.
While crowns are designed to last for years, it’s important to note that the way they interact with the surrounding tissues can affect your oral hygiene. Like any dental restoration, crowns need to be properly cared for to prevent complications such as infections, gum disease, or bad breath.

Can Crowns Cause Bad Breath?
Bad breath is often caused by bacteria in the mouth. The bacteria thrive in areas where food particles and plaque are. Crowns do not directly cause bad breath, but poor oral hygiene around a crown can contribute to unpleasant odors.
There are a few ways crowns can indirectly cause bad breath:
- Plaque and Bacteria Build-Up: If the crown is not properly cleaned, plaque can build up around the edges, especially if the fit of the crown is not perfect. Plaque is made up of bacteria, food particles, and saliva, and when bacteria break down food debris, they release sulfur compounds that can cause bad breath. Over time, this build-up can result in gingivitis (gum inflammation) or periodontal disease, both of which are common causes of bad breath.
- Gum Infection: If the crown doesn’t fit properly or if there is decay underneath the crown, it can create spaces where bacteria can accumulate, leading to gum infection or inflammation. This infection can contribute to bad breath, especially if it’s left untreated.
- Decay Underneath the Crown: In rare cases, a crown might become loose or crack, allowing bacteria to infiltrate the tooth underneath. If a cavity forms under the crown, it can create a breeding ground for bacteria, which will lead to foul-smelling breath. This is why regular dental checkups are essential to ensure that your crown and underlying tooth remain in good condition.
- Food Traps: Crowns, especially those with large gaps or uneven edges, can create spaces that trap food particles. These particles can ferment in the mouth, leading to the production of bad-smelling compounds. These trapped particles are often difficult to remove with brushing alone, which can result in persistent bad breath.
Preventing Bad Breath with Crowns
The good news is that bad breath caused by crowns is preventable. By maintaining good oral hygiene practices, you can significantly reduce the risk of bad breath and other dental issues associated with crowns. Here are some tips for keeping your breath fresh and your crowns in good shape:
- Brush and Floss Regularly: Brush your teeth at least twice a day with fluoride toothpaste, paying special attention to the area around the crown. Flossing once a day helps remove food particles and plaque from between your teeth and around the crown that your toothbrush may miss.
- Use Interdental Brushes or Water Flossers: If traditional flossing is difficult around your crown, try using interdental brushes or a water flosser. These tools can help clean areas that are hard to reach and reduce the chances of plaque buildup.
- Regular Dental Checkups: Visit your dentist regularly to check the condition of your crown and ensure there are no signs of decay or gum infection. If your crown feels loose or uncomfortable, let your dentist know right away.
- Stay Hydrated: Dry mouth is another common cause of bad breath. Drinking plenty of water throughout the day can help keep your mouth moist and wash away food particles and bacteria.
- Avoid Strong-Smelling Foods: Foods like garlic, onions, and coffee can contribute to bad breath, regardless of whether you have a crown. Limiting your intake of these foods can help keep your breath fresh.
Conclusion
Dental crowns do not directly cause bad breath, but poor oral hygiene and related issues like plaque buildup, gum infection, or decay underneath the crown can contribute to foul-smelling breath. By taking care of your crowns with regular brushing, flossing, and dental visits, you can prevent bad breath and ensure your crowns continue to serve their purpose for years to come. If you’re experiencing persistent bad breath, it’s always a good idea to consult with Dr. Kyle Harmon to rule out any underlying problems.