It is recommended to have your teeth checked and cleaned every six months. Having your teeth checked regularly allows the detection of small issues, so that those issues can be addressed before they become larger problems. Thorough checking of the teeth usually involves the periodic taking of dental x-ray films to check on areas of the mouth that cannot be seen just by looking.
Having the teeth cleaned reduces the number of bacteria present on and around the teeth, which helps to prevent tooth decay and problems with the gums and bone that support the teeth. Teeth cleaning can also remove superficial tooth stains related to diet and smoking so that your teeth can look their natural best.