Were you told by your dentist to night wean your breastfed baby for concerns of it causing cavities? Extensive research has proven that there is no link between breastfeeding (nighttime or otherwise) and cavities. Breastfed babies can get cavities, though, so good dental hygiene is still needed.
What can cause cavities are nighttime bottles and not brushing teeth before bed once baby is eating solid foods. Bottles allow liquids to pool in baby’s mouth and sit on baby’s teeth for long periods of time. Breastmilk doesn’t pool in the same way because milk only flows when baby is actively sucking. When baby is latched appropriately to actually express breastmilk, it enters the baby’s mouth behind the teeth. If the baby is actively sucking then he is also swallowing, so breast milk doesn’t sit in baby’s mouth like it can with bottles. Sugars from table foods can sit on the teeth and bacteria in saliva uses these sugars to produce acid, which in turn causes tooth decay. Actively brushing baby’s teeth twice a day helps reduce these sugars from sitting on the teeth.
One Finnish study could not find any correlation between cavities and breastfeeding among children who were breastfed for up to 34 months (Alaluusua 1990). In 2013, Lavigne found, “that there was no conclusive evidence that prolonged breastfeeding increased the risk of early childhood cavities.” Valaitis et al stated, “In a systematic review of the research on early childhood caries, methodology, variables, definitions, and risk factors have not been consistently evaluated. There is not a constant or strong relationship between breastfeeding and the development of dental caries. There is no right time to stop breastfeeding, and mothers should be encouraged to breastfeed as long as they wish.” (Valaitis 2000).
So no need to night wean for cavities… but if you need the sleep I completely understand.