Regardless of how well we follow our dental hygiene routine, sometimes only a qualified dentist can get teeth sparkling white. Most dental professionals discourage the use of so-called whitening toothpastes because they contain tiny particles that scrape off the tooth enamel. While this can have the effect of brightening a smile, it also harms the structure and integrity of the tooth, meaning it is more susceptible to decay in the future. Teeth cleaning in London is an established business operating from NHS and private dentists across the capital. Services cost between £40 and £120 for a session, but with special offers from Groupon, savvy customers can sniff out some of the best deals going.