Most people have probably been to a dentist at one time or another in their lives. Hopefully, this has been on a regular basis. This might include professional cleanings, X-rays to maintain good dental health, and other routine items. Dentistry is a broad term that is mentioned in regards to the health of the teeth, gums, mouth, and jaw. Dentists do treat a variety of oral health problems, as well as diseases. This might include cavities, tooth decay, and gum diseases such as gingivitis. But have you been to an orthodontist? What is the difference?