Scaling is done to maintain the healthy gums. With this the ceramic on the metal does not errode. It is done with the ultrasonic scaler which is not harmful for the teeth and the ceramic coating. So you should not be worried and get the scaling done after every 6 months to maintain the healthy teeth and gums. If you want to know morwabout the scaling you can visit the following link n our website.....http://www.identalhub.com/articlecategory-dental-scaling-24.aspx