I am getting ready for radiation TX (next week) and they just asked me if I had my dental trays done ? I have worn upper dentures for 10 years and only had 3 remaining lower teeth, which I had removed 10 days ago...... SO, do I still need the "dental trays" if I have no teeth ? Do they do anything to protect the gums or are they solely to protect any remaining teeth patients may have ? I didn't find any info in older posts that answered the question so any help is appreciated....... thanks in advance !!