Research has shown that breastfed children are less susceptible to dental caries than their bottle-fed counterparts and are less likely to need orthodontic treatments.
(Labbok, M.H., Hendershot, G.E.: Does breastfeeding protect against
malocclusion? An analysis of the 1981 Child Health Supplement to the
National Health Interview Survey. Am J Prev Med 1987;3 (4):227-232.)