Marieka..One question you asked was about getting care for your teeth now, before your surgery. I know it seems odd to be thinking of getting treated before they remove part of your oral structure, but the remaining structures need to be as healthy as possible, and it wouldn't hurt for your whole mouth to be as healthy as possible, so I would encourage you to get back to the periodontist for treatment. You will need your remaining teeth to be as strong as possible, so if you have gum issues, they need to be addressed now, and it seems to me that overall healing will go better if the rest of your mouth is also healthy. Remember, you will get to keep all of your lower teeth, and you will need your remaining upper teeth to secure your obturator, so you have lots of reasons to get yourself back to the perio. pronto!!
(You are going to be sorry you asked me so many questions, because you are going to get lots of answers/opinions over the next few days.)
XO