Well shut my mouth Ken! I am a veteran RDA certifieded in Coronal Polishing of 27 years still practicing myself! I will tell my Nephews! I'm so glad to know that Doc! Hugs! Dentistry is near & dear to my heart. We have a father/son three hygienist practice with four other RDA' a besides myself. I have my own operatory, where I do a lot of post op checks, child cleanings, ortho checks, denture adjustments, get emergencies started for the doctor, take care of misc stuff. I'm the problem girl, lol. We get a problem, guess who gets it, lol. I get the ball rolling and everything ready for my Doc.