1) How soon after extractions will teeth begin to shift in an otherwise healthy mouth (no gum or bone issues)?
2) How do they normally shift - Backward, forward.. Sideways, even?
3) How drastic of a shift, in say, a 12-month period (if possible teeth can shift in 12 months) will a person notice the difference?
Lastly -
4) Can a retainer be used, alone, in lieu of braces?
Again - many thanks!