Thanks for the reply, she does use a fluoride toothpaste, but the dentist here recommended supplementing it with .25mcg of fluoride. It has become routine now to take a 'crocodile teeth sweety' after toothbrushing. When we lived in Oman the paediatrician we used advised us to use fluoride drops, we'll carry on until her milk teeth fall out as the tabs strengthen the second teeth. She hasn't actually lost any teeth yet and is getting rather cross about it as she is 6 on Saturday and the only one in her class not to have done!