Accuracy of Impressions of Multiple Implants in the Edentulous Arch: A Systematic Review

The effect of scanning the palate and scan body position on the accuracy of complete‐arch implant scans

“…The developments in digital technology give clinicians the option to digitally scan the structures . While the accuracy of various implant impression techniques has been the subject of several studies and many techniques have been reported both in conventional and digital implant scans, there are conflicting reports regarding the superiority of the impression technique's accuracy . Some studies reported that the accuracy of digital implant scans are comparable with conventional impressions …”

“…Digital implant scanning techniques using direct digital workflow have been popular in recent years parallel with the development of various intraoral scanners (IOSs) and their reported advantages . Nevertheless, the accuracy of intraoral digital implant scan is affected by several factors; the IOS system, software program associated with the digital scan system, different scan bodies, experience of the operator, angulation and position of the implant(s), and quadrant . In the literature, few studies have investigated the accuracy of ISBs that represents the 3D spatial position of implants …”

“…1,[16][17][18][19] Nevertheless, the accuracy of intraoral digital implant scan is affected by several factors; the IOS system, software program associated with the digital scan system, different scan bodies, experience of the operator, angulation and position of the implant(s), and quadrant. 7,13,[16][17][18][19] In the literature, few studies have investigated the accuracy of ISBs that represents the 3D spatial position of implants. [16][17][18][19] The scanning of edentulous arches has some challenges due to the lack of teeth as fixed reference points and anatomical landmarks, and has inaccuracies depending of the scanner, software, mucosal morphology, and denture borders.…”

Accuracy of a new elastomeric impression material for complete‐arch dental implant impressions

“…However, to the best of our knowledge, there is no scientific evidence on the accuracy of the new hybrid materials for complete‐arch multi‐implant situations. Most of the earlier published papers examined the impression accuracy at the implant level, and the evidence on the accuracy of complete‐arch abutment level impressions seems inadequate …”

An In Vitro Study of Factors Influencing the Performance of Digital Intraoral Impressions Operating on Active Wavefront Sampling Technology with Multiple Implants in the Edentulous Maxilla

“…Prosthesis misfit remains a major concern in implant dentistry, and it remains especially challenging for full‐arch, screw‐retained multiple implant cases due to lack of cement space to compensate for prosthesis misfit . Conventional dental impressions using impression posts and custom individual trays remain the clinical technique of choice in full‐arch cases; however, despite their success and widespread use, conventional impressions have proven to be influenced by applied materials and technique; number, position, depth, and angulation of implants; alveolar bone undercuts and edentulous span coverage; among other factors . These accumulative errors resulting from the multiple steps involved in capturing, designing, and manufacturing an implant‐retained prosthesis hamper the realization of a fully passive fitting implant restoration .…”