Facilitates proper dental and jaw development
Nursing is good for a baby's tooth and jaw development. Babies drinking from the human breast have to use as much as 60 times more energy to get food than do those drinking from a bottle. Obviously, a nursing baby's jaws are receiving much more exercise as she pulls her mother's milk into her mouth. Apparently, this constant gentle pulling assists the growth of well-formed jaws and straight, healthy teeth. Among breastfed infants, the longer the duration of nursing, the less chance of dental malocclusion.
Breastfed babies have less tooth decay
Breast milk contains bacteria fighting cells that may help kill the bacteria that cause tooth decay. Furthermore, bottle-fed babies "are at increased risk for baby bottle caries, a destructive dental condition which occurs when a baby is put to bed with a bottle containing formula, milk, juice or other fluids high in carbohydrates. Extensive dental repair may be required at a cost of thousands of dollars." Furthermore, breast milk contains bacteria fighting cells that may help kill the bacteria that cause tooth decay.
Less money spent on corrective orthodontia
The longer you breastfeed, the more likely the babies teeth will come in properly. If the teeth come in straight, there's no need to fix them.
Better speech development
Tongue thrust problems often develop among bottle-fed babies as they try to slow down the flow of milk coming from an artificial nipple. This can lead to speech problems later on. "Early weaning may lead to the interruption of proper oral motor development provoking alterations to the posture and strength of the speech organs and harming the functions of chewing, swallowing, breathing, and articulation of speech sounds. The lack of physiological sucking on the breast may interfere in the oral motor development, possibly causing malocclusion, oral respiration and oral motor disorders."
Better social development
The psychomotor and social development of breastfed babies clearly differs from that of bottle fed ones and leads at the age of 12 months to significant advantages of the psychomotor and social capabilities.