Start here and we'll be happy to chime in anyway. We're all here 'cause we love to talk teeth. I use ZDent and Uhler Reveal for repairs and super cheap denture issues. Both are two layer, but Zdent in inside kernal and outside layer, much nicer.
Uhler plus and Artic for standard level, more Uhler plus(4 layer) than Artic.
They make it needlessly complex. You have to go to vitanorthamerica.com choose 'technician' then 'removable' then the tooth brand and after that there is a section on the left of 'downloads' and it's in there.