The phrase "temporary crowns" refers to a type of durable covering that is placed over a damaged tooth for a short period before a permanent crown can be made and placed. Full definition
Performed laboratory procedures such as making temporary crowns, taking and pouring up impressions, pour plaster models, and making whitening trays or night - guards. (jobhero.com)
Kept doctor's instruments disinfected and laid out for use at all times and assisted with procedures — Handed tools, used suction and swabs, applied topical anesthetics, removed stitches, and prepared temporary crowns. (job-interview-site.com)
They may prepare materials for dental impressions or to create temporary crowns. (bls.gov)