What Causes Crooked Teeth?

Heredity plays the major role in the development of crooked teeth. Large teeth in small jaws, too many teeth, small upper jaw with large lower jaw, and jaws not positioned one over the other are some inherited characteristic that cause crooked teeth.
Thumb sucking, mouth breathing, tongue thrusting, and lip sucking are conditions that are related to facial muscle imbalance which, in turn, influences dental development. Activities of the jaw such as clenching, grinding and posturing contribute to jaw joint discords. Missing teeth and periodontal disease contribute to poorly aligned teeth. Therefore, while heredity is the primary cause, acquired habits and other conditions are secondary factors which contribute to the development of crooked teeth.

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