The ultimate guide to perfect teeth: Top experts use the latest science to reveal when to worry, what's normal and how to make them whiter and keep them clean

'Healthy' habits that you should be avoiding It's not just about having an attractive smile – though thanks to the effect of TV's Love Island and TikTok, private cosmetic dentistry is booming. Scrubbing your teeth Anni Seaborne says: 'While it's important to be thorough and spend two minutes brushing twice a day, brushing too hard will weaken your tooth enamel and may also cause gum recession, which can lead to tooth loss.' It's a fact If you're out and can't clean your teeth, eat a piece of cheese - it will neutralise your mouth's pH and protect your teeth from acid 'Once the bone has healed, usually after three months, replacement false teeth – crowns, bridges or dentures – can be fitted over the posts,' says Nilesh Parmar, a dentist at Parmar Dental clinic in Essex. Treatment Toothpastes 'Treatments include repairing damage to the tooth and using toothpaste for sensitive teeth,' says James Goolnik. If you have gum disease, choose a product with chlorhexidine – but use only as directed by your dentist or hygienist as chlorhexidine can stain your teeth over time, so shouldn't be used every day.