Dr. Costigan is a magnificent dentist. She is caring and really listens. She has a beautiful office, supportive staff and is well know for sedation dentistry. I had two root canals and one filing while being sedation with just pills. I felt no pain whatsoever, and barely remember the procedures. If you are afraid of the dentist, go to Dr. Costigan at San Marin Dental Care. It just doesn't get any better.