For most people, six months is sufficient, but it really depends on how at risk you are developing dental problems. So if you've never had any treatment at all, then it may be that you only need to come in every two years. But if you're someone who's prone to getting fillings or cavities or having an ongoing problem like gum disease, it may be that you need to come in every three months, but your dentist will be able to guide you with that.