Are implants possible?

[ElizaJane23]

I've read a lot of the posts here and am learning a lot! I only have the front section of my teeth left, both upper and lower, and these are decaying rapidly at the gumline. My mouth is incredibly dry, due to meds that are unlikely to change. Could the titanium posts that are implanted into the jawbone be done in the areas where I haven't had teeth for the past 13/14 years? My main reason for being scared of dentures is that, because of the dry mouth, will I even be able to wear them? I have a lot of allergies and know I can't use products like Fixodent, etc. Would these titanium implants, placed in the 4 areas (2upper and 2 lower) where I don't have molars, be ok to "snap on" (for lack of a better word) to hold dentures in place? I hope I have found a solution to be able to KNOW that I can wear dentures(!). A few of my teeth may need to be extracted in the next couple of month's, and the rest, with how quickly the cavities are progressing, may have 1-2 years at best. Is this long enough to get the implants firmly rooted in place? And what price range are 4 of these titanium implanted posts? Oh how I hope this would work! Thanks in advance for your comments - ElizaJane