Accuracy of intraoral photogrammetry versus direct digital implant impressions in the fully edentulous lower jaw: An in vitro study.

Objective: To evaluate and compare the accuracy of intraoral photogrammetry (IPG) and direct digital impressions in capturing the three-dimensional (3D) implant position in a fully edentulous mandible model with four multi-unit abutments (MUAs).

Methods: An edentulous mandibular model with four implant analogs was scanned with a reference desktop scanner (INEOS X5®, Sirona) and four different intraoral scanners (IOSs; TRIOS 5®, 3SHAPE; i700®, MEDIT; Aoralscan 3® and Aoralscan Elite IPG®, SHINING 3D), the latter being equipped with an IPG system. In total, 120 scans (30 per IOS) were captured and saved in standard tessellation language (STL) format.