Peer-reviewed veterinary case report
How does scan body alignment affect implant cast accuracy?
By Pérez JO et al.·2025·Department of Postgraduate Clinical Dentistry, Spain·View original on Europe PMC →
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Original publication title: Effect of the scan body alignment process on the accuracy of virtual definitive implant casts: a pilot study.
Plain-English summary
This study looked at how the way scan bodies (small devices used to capture the position of dental implants) are aligned affects the accuracy of digital models used to create dental prosthetics. Researchers scanned the upper and lower jaws of a patient who had no teeth, using different types of scanners and alignment methods. They measured the differences in distances and angles between the implants to see how accurate the digital models were. The findings showed that both the alignment method and the type of scanner used had an impact on the accuracy of these digital models. Overall, the study concluded that careful alignment and choice of scanning technology are important for getting precise results in dental implant work.
Abstract
<h4>Purpose</h4>The aim of the present study was to evaluate whether the accuracy of digital definitive implant casts is affected by both the process of best fit (BF) alignment of the scan bodies (SBs) with the CAD library and the type of scanner used.<h4>Materials and methods</h4>Scans of the upper and lower arches of a totally edentulous patient, each with eight implants, were performed using the Trios-3 (T) and True-Definition (TD) intraoral scanners and the Identica-Light extraoral scanner (EO) for casts. Two types of alignment of the SB with the CAD implant library were performed, using either 3/3 or 1/3 of its mesh. Twelve virtual definitive implant casts were generated, each with a designed prosthetic bar. Analysis included absolute differences in 28 inter-implant distances and 7 relative angles of the bar implant abutments.<h4>Results</h4>Descriptive statistical analysis was carried out, including the calculation of means ± standard deviations and maximum and minimum values for both distances and angles.<h4>Conclusion</h4>In conclusion, the accuracy of digital definitive casts with multiple implants was influenced by both the amount of mesh selected in the SBs during the BF alignment with the CAD library and the optical impression system used.
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Search related cases →Original publication on Europe PMC: https://europepmc.org/article/MED/41180325