A recent study by the University fo Louisville in the United Stated has shown that cavities are contagious.
Cavities are a common dental condition, and now they are proven to be infectious. Common causes for transmission of the bacteria which causes cavities are parent to child infections. Parents who clean their child’s dummies in their own mouths or share spoons whilst feeding increase the risk of transferring oral bacteria which can erode teeth and cause cavities.
The study recommends good oral hygiene for both parents and children. Children especially are to be registered with a dentist as soon as milk teeth start to grow. Parents are encouraged to maintain their own oral health and observe that of their child to prevent infection and development of cavities.
Cavities are shown to be Contagious [via Science Daily]