CPAP and Gum health

I have a Resmed Air Sense 10 Autoset CPAP full face mask and I breathe through the mouth. I wonder if some of the CPAP, settings, particularly the air pressure and /or the humidity level. can cause bacteria growth in the mouth and affect the gum health..

The reason I am asking is that lately, I have a persistent gum irritation just below one of the dental implants. It is not painful, except for a slight burning sensation at wake-up. I have seen my dentist yesterday for the routine cleaning. He removed some plaque as usual, but didn’t notice any serious problem. It is not the first time and usually it disappears in a couple of weeks. This time it is still there, even after the plaque removal.

Usually, I clean the air filter, the hose connection to the mask and the silicon cushions (I have changed them twice). The holding straps have become a little stretched and require frequent adjustment. Often I feel increased air pressure and air leaking under the eyes or around the silicone cushions, before falling asleep but Oscar does not report any significant air leaks .Currently my air pressure is set at 10.4-15.4. I am using de-mineralized water in the CPAP water tub instead of distilled water because the latter is not always available. I wonder if this can be one of the causes.

My AHI’s keep within the normal range: mostly below 1.0, occasionally above, but never above 3.0 or so. I wonder if anybody can comment on this Thanks

Ittiandro