11 month old premature baby has no teeth yet

My baby was born at 33rd weeks ,now she is 11 months old (actual age) her development was normal as full term baby but she is not having single teeth …that makes me worry but my mom used to say that i got my first teeth in 1.8 years but even without teeth i spoke a lot at that times…..is this normal? But she is showing teething signs like biting everything and have droolings but still no teeth…..#pleasehelp #worriedmom