@cara5 Thanks for your good wishes! And I send good thoughts your way too. My prescription toothpaste is a 1.1% sodium fluoride paste—just brush as normal with no rinsing. It's called SF 5000 Plus and is made by Cypress Pharmaceutical. It was prescribed to me by a dentist at UMich when the plan was, at that time, for me to forego TORS and just do radiation and chemo. I remember her saying that I wouldn't need some kind of tooth/jaw guard that is somtimes used during radiation. The idea was that I would simply need to maintain the strength of my tooth coating before, during, and after radiation (she said the rest of my life or forever). The trays your husband will use probably serve a similar purpose, but the extra strength toothpaste may be a good thing too—no harm and maybe a help. Good luck, and may the Gods be with you—