Might as well add to this old thread too. What happened is I went back to the dentist and got into a lengthy argument with him. He was even raising his voice at me. But I asked him "where is my bone loss going to be in 10 years, and how will deal with my teeth then." He got a very worried look on his face and immediately sent me to a periodontist. I've been getting scalings ever since.

But I found out where this idea about no scaling comes from. It comes from a study in the 1930s. And you can see the advice as given by CDC here on the following link: Scroll down to where it says Osteoradionecrosis http://www.oralcancerfoundation.org/cdc/cdc_chapter7.php