Can crowns cause bad breath? You wouldn’t think so, seeing as how they are the go-to dental restoration after the most common causes of bad breath are treated. However, even after you get a crown, bad breath symptoms may come back. Here’s why.

Help! I have bad breath that won’t go away after a crown

It is reasonable to think that bad breath caused by tooth decay would be eliminated after you get a crown. After all, a crown is a common dental restoration that can:

  • Protect a cracked or weakened tooth
  • Replace a broken tooth
  • Cosmetically fix a misshapen or discolored tooth
  • Support a weakened tooth that has a large filling in it

Most of the above conditions are caused by tooth decay, and everyone knows that decay can lead to odor.

Unfortunately, not all crowns are created (or applied) equal. Sometimes a crown can cause bad breath. Often, this is due to an open margin on crown.

What’s the difference between a good crown vs bad crown?

Getting a crown is a fairly routine dental restoration. Your dentist prepares the surface of the natural tooth by filing it down evenly. They take an impression of your teeth and place a temporary crown while customizing the permanent crown. When the permanent crown is ready, they smooth the tooth surface again before fixing the permanent crown in place with dental cement.

This dental restoration works perfectly when everything goes according to plan. A good crown functions just like an intact natural tooth would, protecting the remaining natural tooth from further decay.

While the majority of patients receive a good crown and have no further problems, in some cases a gap will appear between the crown and the natural tooth surface. This is what is referred to as an open margin on crown. The margin, or the area where the crown meets the natural tooth, is not sealed. This allows food and bacteria to enter the space between the crown and the tooth.

What causes an open margin?

So why does this g