Sometimes it may be best to see a specialist for a second opinion. The American Dental Association recognizes nine specialties in dentistry. Here's a few of the most common:

Endodontist: Specializes in root canals and matters concerning the inside, or pulp, of the tooth.

Oral and maxofacial surgeon: Performs surgeries such as wisdom tooth removal, as well as other issues that affect the mouth, jaw, face and skull.

Orthodontist: Treats improper bites and uses appliances such as braces to straighten teeth.

Pediatric dentist: Specializes in the care of infants and children.

Periodontist: Treats gum disease and structures that support the teeth.