Grape juice
In 1869, Dr. Thomas Bramwell Welch, a dentist from Vineland, New Jersey, successfully pasteurized Concord grape juice to produce an "unfermented sacramental wine" for fellow parishioners at his church. Twenty four years later, his son, Dr. Charles E. Welch, also a dentist, gave up his practice to spend more time marketing the grape juice, which became a hit at the 1893 World's Fair in Chicago.

Chewing gum
Although numerous individuals throughout history had been involved in the development of chewing gum, Dr. William F. Semple, a dentist from Mount Vernon, Ohio, obtained the first patent for what he called "improved bubble-gum" in 1869. Dr. Semple planned to make bubble gum out of rubber, adding "scouring properties" such as powdered licorice root and charcoal. He believed the gum would exercise the jaw and clean teeth at the same time. Despite receiving the patent, Dr. Semple never manufactured his gum.

Cotton candy
The spun-sugar confection and the device that made it were invented in 1897 by Dr. William Morrison, a dentist, and John C. Wharton. Their device heated sugar in a spinning bowl that had tiny holes in it. The Nashville, Tennessee inventors called their treat "Fairy Floss." They introduced it to the world at the St. Louis World's Fair in 1904.

Dental chair
Dr. Josiah Foster Flagg, considered to be America's first native-born, full-time dentist, added a headrest and an extended armrest to a Windsor chair to create the first dental chair in 1790. Before Dr. Flagg's invention, patients either had to sit on the floor and clutch onto the dentist's leg for support, or sit stoically in an ordinary chair while the dentist operated.

Anesthesia
Dr. Horace Wells was a dentist in Hartford, Connecticut, when he stumbled upon the use of nitrous oxide - "laughing gas" - as medicine's first anesthetic in 1844. After Dr. Wells saw a public demonstration of the gas, which was featured for people's amusement at a traveling show, he became convinced of its medical possibilities. Shortly afterwards, Dr. Wells had himself put under and asked a colleague to extract one of his molars. When he awakened, Dr. Wells said, "I didn't feel it so much as the prick of a pin. A new era in tooth-pulling has arrived!"