I have tried many different practices for a clean and polish and since meeting Dr Sia, always come to him. He is everything you need, gentle, professional and effective! On this occasion, I mentioned that I had been thinking about a whitening procedure but had had a very bad experience years ago (elsewhere) with Zoom. He advised I try a much more gentle treatment that he advocated called BlancOne. I did not need any encouragement as I implicitly trust his opinion. I could not have been happier with the results! It was quick, comfortable, gentle, effective and economic. Really impressed.