When trying in a final ceramic crown, what is the best method to confirm the restoration is fully seated?

Fit Checker (a thin-bodied vinyl polyether silicone material) is placed on the internal (intaglio) fitting surface of an indirect restoration before try-in; if the restoration isn't fully seated, the material will show areas of greater thickness (indicating excess material/binding preventing full seating) compared with thinner areas where contact is closer — making it a more reliable internal-fit assessment tool than articulating paper (which only evaluates occlusal contacts) or sticky wax/transillumination (which provide more limited information about internal fit).