Yes, adults can have braces. They're normally the traditional fixed braces which are worn from six months to two years. They can be fixed behind the teeth so they aren't visible. They need a lot of brushing to keep them clean and be prepared to everyone to ask why you're wearing them. They cost from �350. There's a new treatment called Invisalign which uses 3-D computer imaging to create plastic aligners that snap on tightly over each set of teeth. They aren't suitable for everyone and cost from �4000.