Teeth that are straight and evenly spaced are easier to keep clean, leading to better oral health. Better oral health can reduce the incidence of heart disease, gastrointestinal disease, and other health conditions.   Teeth that are properly aligned chew more efficiently, and that aids in proper digestion.   Teeth that are straight and properly aligned create a more perfect bite, and that avoids excessive stress, headaches, and strain on your supporting bone and tissue.   The social benefits of a beautiful smile are also important:   Confidence - in job interviews, public speaking and personal relationships.   Clearer speech - teeth play an important role in your ability to speak.