That is a very common question. You should be brushing 2-3 times a day to clean your teeth. For the approximately 20%-30% of adults with perfect oral health, the ADA recommends twice a year hygiene visits. If you are like approximately 70% of adults and have some form of periodontal disease, then you should expect to go 3-4 times a year for hygiene treatment. If you have not been going regularly, then you probably fall into having some form of periodontal issues. If you wait until there is a problem, it is similar to waiting to change your car oil until your engine seizes and can ultimately lead to greater cost and more health issues.
Thanks for asking - have a great day,