You should get your teeth cleaned as often as your dentist recommends you to do so. The recommendation depends on the health of your gums and teeth and on your commitment to your oral hygiene program. Having a healthy oral hygiene program is very food for your teeth and gums as well as your overall health. If you have healthy cavity then you need to get your teeth cleaned by a dentist every 6 months or even you can do it after a year.
There are the people who take so much care of their teeth that they need to visit their dentist. But, this is just an exception; such people are few in number. And it is strongly recommended to visit the dentist at least twice a year for getting them clean. Get your cavity checked for oral diseases and other relevant diseases whose symptoms firstly may appear in your mouth.
You may also need to get your teeth clean by dentist every month if you have any gum disease which may be moderate or advances. Therefore, in order to keep your teeth from getting lost or completely worn out, you need to get it cleaned many times a year. But if the tooth has already been totally decayed then it is useless to take care of it at home on at the clinic of your dental surgeon.
There is another criterion which you should follow to know that how often you should visit the dentist for cleaning your teeth. After being your gum disease discovered you have to take the decision either you have to get it treated and get committed to home remedies for its treatment and prevention for further pain and damaging. In the following case, your dentist may suggest you to visit him monthly or after 3 to 6 months for cleaning. The actual number of visits depends upon the intensity of the diseases. Once you have got your gum healed and your dentist suggest you that now your gum is healthy and you are able to take care of your gums then they may extend your appointments for cleaning to every three months or more than this.
How many times you should visit your dentist for cleaning depends on number of factors. As far as it is about the gum disease, your doctor can suggest you the duration and appointments best suited to you. After a few appointments, your dentist determines that how committed you are in taking care of your oral health and further treatment depends upon your level of commitment. You may get them treated as soon as you get more committed. So just let it be judged by your dentist, alone. Rest is up to you because they can only support, advice and treat you. Its totally over to you how often you visit them.
Always keep in mind! Treatment is what is done to you; prevention is something which is done by you.