Assertion: impression | /r/HasProperty | unthreaded through opening
Facets:
value: on the occlusal of the tray
type: TEMPORAL
Source sentences:
text: What is the impression technique that uses an impression coping with retentive features around which a rigid elastic material is injected and to remove the impression, the impression coping is first unthreaded through an opening on the occlusal of the tray?