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Related Experiment Video

Updated: Jun 12, 2025

Measuring the Complete-arch Distortion of an Optical Dental Impression

Measuring the Complete-arch Distortion of an Optical Dental Impression

Published on: May 30, 2019

Photogrammetry Versus Intraoral Scanning in Complete-Arch Digital Implant Impression: A Systematic Review and

Alessandro Pozzi^1,2,3,4, Lorenzo Arcuri⁵, Paolo Carosi⁶

¹Department of Clinical Science and Translational Medicine, University of Rome Tor Vergata, Rome, Italy.

Clinical Implant Dentistry and Related Research

|June 7, 2025

Summary

Stereophotogrammetry (SPG) is more accurate than intraoral scanning (IOS) for complete-arch implant impressions. SPG offers superior trueness and precision, crucial for passive fit in implant-supported prostheses.

Keywords:

IOS SPG dental implant digital impression full arch intraoral scanner stereophotogrammetry

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Last Updated: Jun 12, 2025

Measuring the Complete-arch Distortion of an Optical Dental Impression

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Published on: May 30, 2019

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Accuracy in Dental Medicine, A New Way to Measure Trueness and Precision

Accuracy in Dental Medicine, A New Way to Measure Trueness and Precision

Published on: April 29, 2014

Area of Science:

Dental Technology
Prosthodontics
Digital Dentistry

Background:

The accuracy of digital impressions for complete-arch implant-supported fixed dental prostheses (FDP) is debated.
Limited systematic reviews compare intraoral scanning (IOS) and stereophotogrammetry (SPG).

Purpose of the Study:

To compare the accuracy of IOS and SPG for complete-arch implant impressions.
Evaluate current digital technologies for capturing full-arch implant data.

Main Methods:

Systematic review and meta-analysis of 13 studies (3 in vivo, 10 in vitro).
Searched PubMed, Embase, Cochrane CENTRAL databases.
Assessed accuracy via linear, angular, surface deviations, and inter-implant distances.

Main Results:

Stereophotogrammetry (SPG) demonstrated higher accuracy than IOS in 10 of 13 studies.
Meta-analyses favored SPG for surface deviation trueness/precision and angular deviation trueness (p < 0.05).
SPG showed superior angular trueness (0.24°-0.80°) compared to IOS (0.28°-1.74°).

Conclusions:

Stereophotogrammetry (SPG) is more reliable than IOS for complete-arch digital implant impressions.
Intraoral scanning (IOS) showed angular deviations potentially compromising passive fit.
Further clinical trials are needed; rigid prototype try-in remains recommended.