Malocclusions (bad bites) are predominantly inherited but some are acquired. Inherited problems include crowding of teeth, too much space between teeth, missing or extra teeth and other irregularities of the face. Acquired malocclusions may be caused by injuries, thumb or dummy sucking, dental diseases or early loss of teeth. Malocclusions not only affect the alignment of teeth but also facial development. For more information please view the New Zealand Association of Orthodontists website.