For most people, about every 6 months is the correct interval. This is usually based on the amount of scale build up that forms on your teeth and therefore some people, we may extend as far as 12 months and in the other extreme, some people may need to see their dentist every 3 to 4 months. Other factors such as caries rate,various general medical conditions, and the wearing of appliances such as orthodontic braces will also influence the desired period between intervals.