Printing dental temporary crowns
You ask about &quot;filament&quot;, so I assume you expect fused-filament technologies. These are however not accurate enough, besides being prone to gaps and crevices which are problematic in crowns. The smallest viable nozzle, 0.2 mm, is still too rough for that.
Dental 3D printers need to be very accurate, so the most common technologies used are stereolithography (SLA) and digital light processing (DLP).
Crowns can be made using resin printing. It is possible to use also CNC machining of porcelain, but it's not part of 3D printing.
More info can be found on https://all3dp.com/2/dental-3d-printing-guide/