There are several reasons why some people's #teeth grow in #crooked, #overlapping, or #twisted. Some people's mouths are too small for their teeth, which crowds the teeth and causes them to #shift. In other cases, a person's upper and lower jaws aren't the same size or are #malformed, resulting in either an #overbite, when there is excessive protrusion of the upper jaw, or an #underbite, when the lower jaw protrudes forward causing the lower jaw and teeth to extend out beyond the upper teeth.
Most often crooked teeth, overbites, and underbites are #inheritedtraits just as the color of your eyes or size of your hands. Other causes of #misalignedbites are early loss of baby or adult teeth; #improperfit of #dental #restorations (for example, fillings or crowns); gingivitis (gum disease); undue pressure on the teeth and gums; misalignment of the jaw after an injury; tumors of the mouth or #jaw; or common #oralhealth problems in children such as thumb sucking, tongue thrusting, pacifier use beyond the age of three, or prolonged use of a bottle.