Meanwhile, a second study out this month supported the fruit's health benefits, outlining a link between apples and a reduced likelihood of strokes.
The first study led by Professor David Bartlett at the King's College London Dental Institute suggested that apples can be up to four times worse for teeth than fizzy drinks.
The findings indicated that people who ate apples were 3.7 times more likely to have damage to their dentine - the main supporting structure of the tooth - than those who did not.
"Doctors quite rightly say that eating apples is good. But if you eat them slowly, the high acidity levels can damage your teeth," Bartlett explained.
Responding to the study, Barlow said: "There has always been concern from the dentistry profession about the potential damage from eating apples, given their sugar and acid content. Regular brushing is obviously important. But there are a huge number of reasons why they are also good for the health for people of all ages."
The latest study from the Netherlands concluded that apples, along with other white-fleshed fruit and vegetables, reduced stroke risk by more than 50 per cent.
Linda Oude Group of Wageningen University, who led the study, said: "Eating one apple a day is an easy way to increase white fruit and vegetable intake." But she added that more research was needed to establish why only white-fleshed produce had this effect.