My DS is almost 15 months and still does not have any teeth. The Dr had said if there were no teeth by 15 months he would need to go to the dentist to get x-rays to see what was going on. When I mentioned this to my dentist he laughed and said, "What 15 month old do you know that would sit still long enough for an x-ray?" So any DISers have any experience with this? My DD first got her first teeth at 8 months so this is new to me. Thank you! 
