The first of the lasers (called an 'Erbium:YAG' laser) is what we use for all 'hard tissue' procedures. This means that we use it for removing dental decay from a tooth, (or indeed an old plastic filling which might need to be replaced.) We use the laser instead of 'the drill' - hence no high pitched noise, vibration etc. which the 'drill' produces. The laser is much, much gentler on the tooth than a conventional dental 'drill', and most treatments can be performed painlessly, with no need for injections or similar.