Oh I'm too late. Oh well.
Ok so, this won't be based on experience only from what I technically understand of the whole processes and situations.
Well, just a bit of infos for those that might have to go through the same choice dilemma.
All printers in these last few years are very accurate and are absolutely fine for our use, cheap or not.
You'll find a good paper here:
Judging the dimensional accuracy of the resulting printed part requires comparison and conformity between the 3D printed model and its virtual counterpart. The resolution and accuracy of 3D model samples are determined by a wide array of factors depending on the technology used and related...
www.nature.com
It's from 2022 and it's probable cheap printers are now better than dental ones.
This is because of different technology and psychology.
The fact is, companies like elegoo and anycubic have a huge market, probably much bigger than dental, and it's very competitive, surely low margins, they always have to get new stuff out so people get hyped and very much need, benefit or enjoy having very precise models of their stuff, toys, drones, prototypes etc ...
It's also because LCD screens manufacturing just like semiconductors keep going smaller and smaller, we now have very small pixels for XY and the platforms for Z, or height, keep improving and are robust and precise, you could make each layer 10 microns thin but it'd be useless.
On the contrary companies that sell for dental industry need to have a machine that is well known and supported for years and not make one every year or so, else technicians would be lost and fear of making the wrong choice, hence they'll just wait and not buy.
They do have advantages I guess, some can probably heat your resin, but nothing a microwen can't do.
Now, what is important is that not all resin cure in cheap printers. From what I know all LCD printers cure at 405 nm, so, you'll need a resin that is indicated to cure at 405nm like this one for dentures or temporaries:
Works with any type of DLP or LED/LCD 3d printer Produce your removable dentures now better, faster and easier! PowerResins Denture is a CE certified biocompatible Class IIa material developed to printing denture bases. Design, print and finish perfect removal dentures Perfect fit and suitable...
powerresins.com
Works with any type of DLP or LED/LCD 3d printer Temp resin is a CE certified Class IIa biocompatible resin for patient’s in-mouth use as temporary teeth. It is easily processed and cleanable material that is compatible with natural dental aesthetics. This resins is Light which is perfect to use...
powerresins.com
Then, if you have a cheap post curing unit you'll probably have to cure a long time and will most likely not get the best of the characteristics of the resin.
For exemple, I use a castlable wax resin from liqcreate and cure it in an elegoo mercury plus, it's quite low power so the recommended time is 30 minutes.
So maybe get a unit like one of those:
OtoFlash - Polymerization unit for light-curing resin materials
www.voco.dental
UW-02 Washing/Curing Machine Resin 3D Printer,Efficient and easy slicing High preformanic mainboard,Precision integral light source,Efficient and easy slicing.
www.creality.com
Hope that helps =)