HI, S.,
All the other moms are so great with the advice they gave you. The only thing I would add. Is that you have to get your mom on board with what you are doing. Because if you have one plan and are hard at work and she's the one with your daughter and thinks the "bo bo" is ok, she'll continue to give it to her because she sees no issue with it. Just tell her that you heard, it's bad for the teeth and you want to wean her from it and only, say, nap time is when she can have it now. Or cold turkey or whatever. But you just have to let your mom know what you want to happen while you're not there to help her through this transition and it will be easier all around.
My son spit his out at around 4 months old and my mom and mother-in-law kept telling me to get a different one for his mouth that he would prefer, but I figured, if he was spitting it out, I could be done with it all together if I just didn't give it to him any more. I lucked out, tremendously. Had some tough times soothing him in other ways, but then again I breastfed so I may have become his pacifier. But he's 19 months old now and no pacifier, no mama being the pacifier and no thumb sucking. So things will change for the better eventually.
Good luck to you and let us know how it's working out. :)
Kel