Why that 'healthy' juice could be as bad for your teeth as cola

By CAROL DAVIS

Not so innocent: Sugar and acid in fruit juice attack the enamel in your teeth


Caroline Daniels had always prided herself on the fact she ate a healthy diet, exercised regularly and avoided too much alcohol. On nights out with friends, she’d sip on Coke, rather than wine, and every day she drank fruit juice rather than teas and coffees.

But then, two years ago, she started suffering agonising pains in her teeth.

‘Just a sip of cold orange juice would send a sharp pain through my teeth and up towards my gums,’ says the 54-year-old assistant shop manager from Epsom, Surrey.

‘And cold fizzy drinks were just as bad. The pain was enough to make me wince or even gasp out loud. It got to the point where I’d leave my drink untouched.’

Over the next six months, the pain got steadily worse, until finally Caroline went to see her dentist. He explained she had widespread damage to her tooth enamel. The hard, protective enamel had eroded away, exposing the dentine - the softer layer underneath.

The dentine naturally has small holes in it leading to the nerves. But now, without the protective enamel, anything hot or cold was able to penetrate through these holes to the nerves, causing pain.

‘I asked him how this could be possible,’ says Caroline. ‘I’d always been so diligent about brushing my teeth after every meal.’ Her dentist then explained that her fruit juice and fizzy drink intake - three large glasses of orange juice a day and the occasional Coke - were the problem.

‘The sugar and acid in the juices had attacked the enamel of my teeth, and the fizzy drinks would not have helped. I was amazed, because I’d thought I was being so healthy.’

What’s more, Caroline was making the situation worse by brushing her teeth immediately after drinking. This is because the enamel is softened for up to an hour after drinking acidic juices, making it vulnerable to aggressive brushing.

Dental erosion is an increasingly common problem. Unlike decay, where parts of the tooth are attacked by bacteria in the mouth, dental erosion is caused by acid.


Smiling again: Caroline Daniels limits herself to one glass of juice a day and never brushes her teeth straight after, when the acid has softened the enamel


There are several causes of erosion - including acid reflux, when natural acids in the stomach flow up the mouth, sometimes eroding the back teeth, and over-brushing with abrasive toothpastes.

However, it is thought that the main culprit is acids in our diet, found in fruit juices and fizzy drinks. Research in the U.S., published last year, found that daily exposure to fruit juice caused even more damage to tooth enamel than some of the controversial home whitening treatments.

‘The acid in orange juice is so strong that the tooth is literally washed away,’ said the study leader YanFang Ren, an associate professor in the department of dentistry at the University of Rochester. ‘It’s potentially a very serious problem for those who drink fruit juice and fizzy drinks every day.’

What’s more, the damage often starts in childhood. The most recent national Dental Health Survey found that while there were fewer cases of dental decay today than in the previous couple of decades, more than half of five-year-olds had lost part of their tooth surface through erosion.

‘We are seeing more cases of dental erosion,’ says Dr George
Druttman, a dental expert at Cap City Dental in the City of London.

‘While parents think they are doing the best by their children by giving them “healthier” drinks, the acid in these drinks is wearing away the enamel.

‘Similarly, I now see lots of young professionals with quite pronounced damage to the enamel. Many are quite horrified to think that fruit juices (and that includes smoothies), which many think of as healthy, are actually damaging their teeth.’
The mouth is a naturally nonacidic environment. Healthy saliva is neutral or slightly alkaline - about pH7.4.


source: dailymail