"Now we need to do clinical tests to see whether the resin really does strengthen teeth longer."

Chewing gum also increases saliva flow, which helps prevent enamel erosion because saliva strengthens teeth with key minerals.

Their Active Mouthguard is a refreshing mouthwash with a special anti-bacterial agent to fight plaque plus it contains fluoride to strengthen teeth.

In addition, Pfizer says its Trident Advantage line, which has been widely available for a year and half, strengthens teeth.

Aquafresh Triple Protection - Aquafresh introduced this type of toothpaste in 1981, which, as they said, "gives good breath, strengthens teeth with fluoride, and fights cavities".

Dentists also recommend using thin porcelain veneers to strengthen worn teeth.

Used properly, fluoride strengthens teeth and prevents tooth decay.

Fluoride strengthens developing teeth in children and prevents tooth decay in both children and adults.

'It is a proven fact that it strengthens growing teeth.'

Over time, she explains, fluoride soaks in and strengthens teeth, even though it may be slathered on the tooth surface for only a minute or two at a time.