The appointment twice a year is good for most people; however, some may need to see it more frequently. These people include those who have:
Gum disease
Family members have a history of plaque buildup or tooth decay
Weakening of the immune system (the body's own ability to fight infections and diseases)
Have experienced some life events - especially those that cause stress or illness. In this case, oral changes or infections may occur.
On the other hand, teeth and gums are heavily weighted and people without any problems may need less dental attention.
Ask your dentist what access schedule best suits your dental health.