Graphene oxide could be used to make super strong dental fillings that don’t corrode, according to a new study. Research suggests we chew around 800 times in an average meal; that’s almost a million times a year. We put our teeth under huge strain, and often require fillings to repair them. Fillings are typically made of a mixture of metals, such as copper, mercury, silver and tin, or composites of powdered glass and ceramic. Typical metal fillings can corrode and composite fillings are not very strong; Graphene on the other hand is 200 times stronger than steel and doesn’t corrode, making it a prime new candidate for dental fillings.