Pacifiers- getting mixed messages. Help???

My pediatrician wants me to take the pacifier away from my 2 yr old b/c she said it will cause damage to my daughters teeth. However, when I went to the American Dental ociation they said it won't effect a child's teeth until they turn 4. My 2 yr old only takes the pacifier while going to bed, and doesn't even have it in her mouth the entire night. She's very attached to it and in the past year there have been many changes for her moving, new sibling, her father deploying and I am just having a hard time taking away her "lovie". Anyone know when it actually starts effecting kids teeth or any suggestions on how to take away the pacifier?