there are 4 things you need to consider.
1. material availability. not many printers print denture acrylic or compatible plastics. youre basically right now only looking at 2 printers, the Bego Varseo and the 260vs.
2. resolution. this is very important and often overlooked. your build plate is only going to be built like the resolution of a printed piece of paper. print any image at 600 DPI and then print the same mage at 1200 DPI. youll notice much smoother lines, sharper finish. still crap but sharper. this DPI is a big deal, because your built plate has a DPI. you can design products within 20um sure but the printer might not actually be able to resolve its features. this is the main reason people think 3d printing 'isn't there yet' for dental, because they look at the very visible relief lines on a model and proclaim "this must be how all the prints look, which means theyre terrible and i cant trust it" (obviously they are mistaken)
3. speed. it super important man. if you crank up the printer to the max quality, how slowly do you get your prints? UHD mode on any printer makes printing reallly slow. it will be important to know how long youll be waiting.
4. if all the above criteria are met or satisfactory, you are now permitted to evaluate its layer thicknesses. this number is usually the one the throw at you in the brochure when they say "this thing is 30um accurate" and then hope you dont read the fine print that says while yes the layers can be 30um, actually printing with that will be long, and prone to error, because the slicing algorithm has problems identifying flat edges (important when you want to add an articulator interface). call me cynical but having dealt with this problem personally i can tell you im not overly fond on answering questions like this. i have to explain an abstract concept and can;t really use pictures to help aid communication.
suffice it to say dont fall for the lies in the brochure. ever. when you buy a printer, a microwave, a house, or a vacation.
and im rambling.
you dont need more than 50um 'accuracy' (i roll my eyes every time i write that word) if you find a magical printer that prints denture material.
