I used stannis gel for about 6 months post treatment. The entire time I used it, I had sensitive gums. My oral surgeon (also my cousin) started doing some implant work for me early this year, and he was quite concerned about the length of time I needed to leave the stannis flouride in each day, and that I was using it daily.
He felt strongly that the ongoing irritation caused by both the flouride and the trays was not doing me any favors. He said that many centers use the gel because it is very good bang for the buck. It's cheap to produce, it's been around a long time, and for casual use works well.
For folks like us using it daily it can be too harsh. He put me on Oral B one minute foam in January and I am REALLY glad he did.
My compliance is better because I need to keep the foam in my mouth for a minute instead of 10.
I can use trays, and do, however it is just as effective to shoot a "blob" of it into my mouth, move it over and around my teeth with my tongue, and spit it out. The foam is flavored, so it doesn't even taste bad.
I had my last round of implant surgery on June 1 ( YAHOO!!! I HAVE TEETH) and he says everything is looking perfect. That was also the conclusion of the dentist at the cancer center. The foam is more expensive, but it lasts a LONG time. I still have a little bit in the first can I got back in the end of January.
Maybe Jerry (WickedDDS) can chime in here too. I know I will not ever go back to the gel
Wayne