The impression post is carefully screwed into the implant or implant analog within the patient’s mouth prior to taking the impression. The post is manufactured to exact tolerances to match the internal connection geometry of the specific implant system it’s designed for—ensuring a secure and accurate fit. The design typically includes retentive features such as grooves, flanges, or notches that lock into the impression material (usually a polyether or PVS), enabling the post to remain embedded in the impression after removal.