Dr. Donald Lemire is an endodonist practicing in Bonita Springs, FL. Dr. Lemire is a specialist dentist, focusing on tooth pain, root canals and other issues related to the interior part of the tooth. Endodonists can diagnose problems and perform procedures to fix them. Treatment from an endodonist can often save a diseased tooth. Root canal treatment is one of the most common procedures performed by an endodonist.