Related Experiment Video
Updated: Jul 2, 2026
Measuring the Complete-arch Distortion of an Optical Dental Impression
Published on: May 30, 2019
Accuracy of Digital Impressions of Implants With Angulated and Different Vertical Positions in the Full Arch: An In
Sina Safari1, Neshat Atashpareh2, Hamed Bahrami Maleki3
1Department of Prosthodontics School of Dentistry, Kerman University of Medical Sciences, Kerman, Iran, kmu.ac.ir.
Purpose:
The present in vitro study was conducted to evaluate the trueness and precision of full-arch digital impressions of implants with different angulations and vertical positions.
Methods:
Two angulated and two parallel fixtures were placed on two typodonts (subcrestal and crestal). Four scan bodies were fixed on the fixtures. Typodonts were scanned using 3Shape TRIOS 3 and Planmeca Emerald scanners. Furthermore, they were also scanned by a 3Shape D810 laboratory scanner as a reference. Subsequent to making a cross-section on the scan bodies, four points were obtained, out of which, six lines were traced. The obtained lines represented the distances between scan bodies. The differences of the distances in the scans prepared by the TRIOS 3 and Planmeca Emerald scanners were measured using the reference scanner and were analyzed using a paired t-test.
Results:
In subcrestal models, TRIOS 3 showed significant differences for distances 1-2, 1-3, and 2-4, while Planmeca Emerald showed significance only for 2-4. In crestal models, TRIOS 3 showed significant differences for 1-3, 1-4, 2-4, and 3-4, whereas Planmeca Emerald showed significance only for 2-4 after correction.
Conclusions:
The TRIOS 3 scanner showed higher trueness and precision in subcrestal and angulated implants, while the Planmeca Emerald showed slightly higher trueness at the crestal implants. Both scanners showed small deviations relative to the reference scanner, with TRIOS 3 demonstrating higher overall precision.
