Another advantage is that composite fillings can be chemically bonded to the tooth cavity, which can result in a stronger tooth structure because fillings that are bonded to the tooth require less healthy tooth material to be removed when preparing the cavity.

Another advantage is that glass ionomers chemically bond to the tooth cavity, which can result in a stronger tooth structure because fillings that are bonded to the tooth require a smaller quantity of the healthy tooth material to be removed when preparing the cavity.