What does DDS MA behind a dentist name mean?

DDS stands for Doctor of Dental Surgery. It is the most common dental degree in the United States.

MA stands for Master of Arts. It is a graduate degree that is often pursued by dentists who want to specialize in a particular area of dentistry.

So, a dentist with the title of DDS MA has a doctorate in dental surgery and a master's degree in a specific area of dentistry.