I got a full set of , same day dentures back in 2011. Up until recently they have been pretty good to me. About two weeks ago I clenched my jaw and the bottom denture plate cracked. I got home and took them out just to have the crack, and pressure used trying to ease them out made them crack in half. Everything I found on line pretty much was 50/50 on using a home repair kit. My partner said we may as well super glue them. We did, this was on labor day weekend by the way, and no one could see me before Tuesday. So I was a little panicked and went with the first solution provided to me. It worked great at first but here I am still with no new denture, and the super glue isn't holding the two pieces together anymore. Okay so now here's my question. Would getting just the bottom plate replaced be okay? I don't really have the money for a whole new set right now. The dentist I'm seeing Monday called me this afternoon and explained that if I only get the bottom replaced and not the top, that my teeth won't line up. Would I notice the difference? Would it make things uncomfortable? Any information would be a big help really.

These questions are best answered by a health professional.

They can do, just a bottom plate, and make them line up.
They take impressions of the bite.