Hi I would advise that you go prepared. Have you been working already as a dental nurse? Read up on the place you are interested in working in. In the next few days ,write down a few things you have done and how it could be useful for your job. Also if you are keen to learn and do CPD let them know, i'm sure most employers like that. Be polite and genuine and above all just be you!! Also, have a few questions in mind that you could ask them, its you checking them out too. Good luck