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Accuracy of Digital Impressions at Varying Implant Depths: An In Vitro Study


Now online in the Journal of Prosthodontics, an in vitro study on the accuracy of digital impressions at varying implant depths, co-authored by ACP members, Vivia Sequeira, BDS, MS, Matthew T. Harper, DDS, MS, and Matthew S. Bryington, DMD, MS, FACP.

Implants placed at variable depths may effect the amount of visible scannable surface of a scan body. Intraoral scanner technology uses advanced optical principles to record the surface of the scan body to accurately capture the implant position. This study investigated the effect of implant placement depth on the accuracy of digital implant impressions using an intraoral scanner.

A partially edentulous gypsum master model was fabricated to allow the positioning of a single implant analog at different depths (7, 6, 3, and 0 mm). The model was digitized with a laboratory scanner for the reference scan and with an intraoral scanner to generate 15 test scans per group. The test scans were superimposed onto the reference scan using the best fit algorithm to analyze and measure the positional and angular deviation of the scan body.

The accuracy of digital impressions is influenced by the implant depth and the amount of visibility of the scan body. The trueness and precision are highest when the implant is placed at 0 mm depth with complete visibility of the scan body and decreases with subgingival implant placement.

Sequeira V, Harper MT, Lilly CL, Bryington MS. Accuracy of digital impressions at varying implant depths: an in vitro study. J Prosthodont; https://doi.org/10.1111/jopr.13496


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