The Connection Between a Bad Bite and Headaches
Misaligned teeth or dental arches can lead to all sorts of issues — and headaches are right up there on the list. Malocclusions such as underbites, cross bites, open bites, and overbites can cause jaw pain, muscle tension and head pain. But how exactly can misalignment cause headaches?
When your teeth don’t fit together well, your jaw can’t relax when your mouth is closed. In other words, with malocclusion, your jaw muscles are under constant stress. This strain on your jaw can lead to tension headaches, jaw pain, excessive or uneven wear on tooth enamel, or fractured teeth.
Your jaw and head are connected by a network of muscles, nerves, and joints. When you have a misaligned bite, your muscles must work overtime when bringing your teeth together, chewing, or even keeping your mouth closed. This extra strain can lead to muscle tension and headaches.
Here’s a list of the different types of malocclusion that can potentially cause headaches:
Overbite: You’re likely most familiar with this type of misalignment — an overbite is when your upper teeth overlap your lower teeth. Now, keep in mind that it’s normal to have a small overbite, but an excessive overbite can be problematic, causing extra wear on the front teeth, jaw pain, headache, and facial tension. A severe overbite is called a deep bite.
Underbite: Think of an underbite as the visual opposite of an overbite. It’s when the lower front teeth are on the outside of the upper front teeth when your mouth is closed. This orthodontic problem can cause jaw pain, TMJ dysfunction, difficulties with chewing, and even contribute to sleep apnea.
Overjet: This can be tricky for patients to recognize in the mirror and can be confused with an overbite. An overjet is only the upper front teeth sticking out in front of the lower front teeth. It’s sometimes called “buck teeth” or protruding teeth. This kind of malocclusion increases the risk of injury to the top front teeth and can cause pain in your jaw joints.
Crossbite: A crossbite is when the upper teeth sit on the inside of the lower teeth. You can have a front crossbite or back crossbite, depending on where it occurs in your mouth. In kids, this kind of bad bite can cause the jaws to develop asymmetrically; for both kids and adults, a crossbite can lead to jaw pain, TMJ dysfunction, and make chewing difficult.