Tooth symbolizes your appearance - falling of tooth means you have insecurity regarding your look, how you appear or you want people to notice you .. .. it may not be true in your case, but in general terms it means that you have some fear.
Religious scholars link teeth with family members .. .. top teeth for male, bottom teeth for females and the front teeth donates your sons, daughters, brothers or sisters .. so it “could” means something related to them .. .. ..
One question, do you remember the time you saw the dream?
whatever the dream means, you should do sadqa asap