Assertion: impression | /r/HasProperty | needed
Facets:
Source sentences:
text: If the tray is removed too early, the impression will be ruined and another impression will be needed.
text: It is also used in other contexts where an impression similar to a dental impression is needed, such as in audiology (to take ear impressions for fitting custom hearing protection or hearing aids) or in industrial applications (such as to aid in the inspection of interior features of machined parts, for example, internal grooves inside bores).