Hi, I'm not a dentist but this webpage addresses part one of your
question: http://www.doctorspiller.com/Prevention.htm
> How long should you really have a check up and to have your teeth descaled?
> Is it very important you have it done if your not having any pain or
> discomfort?
The rule of thumb is every 6 months, though this figure is somewhat
arbitrary. Depending on your gums and teeth, every 3 month to once a
year is a ballpark figure. Your dentist would know best. It's important
you have your teeth scaled as a preventative measure. Don't wait until
you're having pain or discomfort.