Oh, my son has the same thing, but he is 4 now. He wasn't diagnosed until last year, so it is a blessing you have that diagnosis at 10 months--the earlier you recognize things, the better it is later in life. Sensory Integration kids are each different in how they present and what they tolerate, as I'm sure you know, but they are such a joy. Many times things are so difficult, but I reassure you that they are amazing (I'm sure you know that too, but if you are like me, it is always nice to hear.)
As for the oral defensiveness, this is still an issue for us too, but some things that have been suggested to us: a quick lick of a popsicle/ice (harder with younger ones) prior to eating numbs the sensitivity, begin with things they like and try to introduce new things slowly, even if they spit new things out--be encouraged because this is a step towards "eating" (our OT taught my son to spit out food, just to get it in his mouth), and taking the end of an electric toothbrush and rubbing it around the jaw and mouth area just prior to eating. Also, we've found allowing our son to have things that bring comfort at the dinner table helps--his favorite cuppy, a special toy, sometimes even his blankie. The hardest stuff for me with all of this is the feeling like "I'm just not doing it right" and the looks I get for allowing him to do some of the things he does...but just remember, you are momma and you know (and/or will learn) what works best for him and feel free to do what works. It may be weird and crazy, but at least they are eating, or brushing their teeth, or whatever else is difficult. Good luck to you!