Cracked teeth
Written by Dentist Rune Skou, 2008-20-12Last update: 2010-01-01
Cracks in the teeth are most often found in teeth with fillings and those which have been subjected to excessive wear. They cause the teeth to take on a ‘chipped’ appearance.
How it works:
Teeth develop cracks when they’re acted on by external, mechanical forces throughout their lifespans: when fully formed, teeth are very rigid and so can’t bend to avoid external strains.
Over time, these strains cause microscopic fissures to form [similar to how metal fatigues]. When enough have been created, they connect together to appear as a visible crack.
The first molars are particularly susceptible to cracking, as they are exposed to the largest amount of bite force on a regular basis. The front teeth can also develop them, however – especially in cases of dental trauma.
Ignoring cracks increases the chances of a tooth becoming fully fractured.
The body’s defence mechanisms:
The body primarily defends itself against cracked teeth by making excessive bite force an unpleasant experience.
If existing cracks become large enough to reach a tooth’s nerve, the body will also discourage use of that tooth [and suggest seeking dental assistance] by making it feel sore.
Risk factors:
- Increasing age
- Teeth with large fillings
- Teeth grinding
- Teeth which have undergone a root canal procedure
- Rough/violent sports [increasing the risk of dental trauma]
Prevention:
- Use a tooth guard when playing rough/violent sports
- Use a bite splint if you grind your teeth
What will your dentist/dental hygienist do?
If your dentist/dental hygienist suggests treating a tooth with a crown, this is often to combat cracking. Depending on the size of the cracks, it may sometimes also be possible to exchange an old amalgam filling with a composite filling to deal with the problem.
As a preventative measure, a bite splint or tooth guard can be created.