An orthodontist is a dentist who specializes in treating misaligned teeth and improper bites. They focus on controlling and modifying facial bone and teeth growth to correct proportions inside the mouth and in relation to the face. For people with defects in teeth alignment that make their face look deformed, seeing an orthodontist like one in Rancho Cucamonga can help. The orthodontist will first diagnose the problem by identifying deformities and malocclusions, explain the issue and possible causes to the patient, then design a customized treatment plan based on the patient's needs and wishes.