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Malocclusion and Orthodontics - Cause

Malocclusion (poor bite) is usually caused by problems in the shape or size of the jaw or teeth. If children have a small jaw, their teeth may grow into a space that is too small. Under these crowded conditions, teeth will push each other out of proper position. Other causes include thumb-sucking, pacifier use, and tooth loss.

Genetic factors

People can inherit mismatched traits such as jaw size and tooth size. This can produce large, crowded teeth in a small jaw or small teeth that drift out of place in a larger jaw. In other cases, a person may inherit a trait that results in missing teeth or teeth that erupt in one another's place (transposed teeth). More rarely, people are born with conditions (congenital) that can create malocclusion problems, such as a cleft palate or a severely underdeveloped upper or lower jaw.

Oral habits

Oral habits that place ongoing or frequent pressure on the teeth may slowly move the teeth out of place. The most common oral habits that cause malocclusion include:

Tooth loss

Tooth loss may cause drifting of bordering teeth into the empty space, creating a poor bite. Common causes of tooth loss are:

  • Trauma, such as sports injuries and automobile and falling accidents.
  • Tooth decay that leads to having a tooth pulled (extracted) by a dentist. Poor dental hygiene promotes tooth decay, as does a child sucking on a bottle during sleep. The sugars in milk, juice, and formula can cause damage to teeth. For more information, see the topic Tooth Decay.

See a picture of tooth decay camera.gif or baby bottle tooth decay camera.gif.

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WebMD Medical Reference from Healthwise

Last Updated: January 02, 2013
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
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Number of Days Per Week I Floss

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Only 18.5% of Americans never floss. You are missing out on a simple way to make a big difference in the health of your mouth. Regardless of how well you brush, plaque still forms between your teeth and along your gums. Floss removes food trapped between the teeth and removes the film of bacteria that forms there before it turns to plaque, which can cause inflamed gums (gingivitis), cavities, and tooth loss. Try flossing just one tooth to get started.

You are one of 31% of Americans who don't floss daily. You are missing out on a simple way to make a big difference in the health of your mouth. Regardless of how well you brush, plaque still forms between your teeth and along your gums. Toothbrush bristles alone cannot clean effectively between these tight spaces. Flossing removes up to 80% of the film that hardens to plaque, which can cause inflamed gums (gingivitis), cavities, and tooth loss. Aim for 3 more days!

You are one of 31% of Americans who don't floss daily, but you're well on your way to making a positive impact on your teeth and gums. Regardless of how well you brush, plaque still forms between your teeth and along your gums. Toothbrush bristles alone cannot clean effectively between these tight spaces. Flossing removes up to 80% of the film that hardens to plaque, which can cause inflamed gums (gingivitis), cavities, and tooth loss. Aim for all 7 days!

Only 50.5% of Americans floss daily, and good for you that you are one of them! Regardless of how well you brush, plaque still forms between your teeth and along your gums. Toothbrush bristles alone cannot clean effectively between these tight spaces. Flossing removes up to 80% of the film that hardens to plaque, which can cause inflamed gums (gingivitis), cavities, and tooth loss. Congratulations on your good oral health habit!

SOURCES:

American Dental Association, Healthy People 2010

This tool is intended only for adults 18 and older.

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