Related Experiment Video
Updated: Aug 10, 2026
06:03
Integrating Augmented Reality Tools in Breast Cancer Related Lymphedema Prognostication and Diagnosis
Published on: February 6, 2020
A three-dimensional evaluation of a laser scanner and a touch-probe scanner
Anna Persson1, Matts Andersson, Agneta Oden
1Karolinska Institutet, Institute of Odontology, Huddinge, Sweden. anna.sk.persson@ki.se
The Journal of Prosthetic Dentistry
|March 18, 2006
Summary
Two dental surface digitization devices were evaluated for accuracy and repeatability. Both optical and mechanical scanners demonstrated comparable performance, with repeatability within 10 micrometers and relative accuracy within +/- 6 micrometers.
Area of Science:
- Dental Technology
- Metrology
- Digital Dentistry
Background:
- Accurate dental restoration fit relies on high-quality manufacturing.
- Assessing complex tooth surface topography is challenging due to the lack of exact reference forms.
Purpose of the Study:
- To evaluate the repeatability and relative accuracy of two dental surface digitization devices.
- To utilize computer-aided design (CAD) for three-dimensional deviation analysis.
Main Methods:
- Ten Y-TZP tooth dies were digitized three times each using optical and mechanical scanners.
- Point cloud data generated CAD reference models (CRM).
- Registration software aligned surfaces, and color-difference maps visualized discrepancies.
Main Results:
- Both scanners exhibited repeatability within 10 micrometers (SD and absolute mean).
- Optical digitizer showed even deviation distribution; mechanical digitizer had minimal surface deviations.
- Relative accuracy for both devices was within +/- 6 micrometers (median values).
Conclusions:
- The optical digitizer's repeatability is comparable to mechanical digitization devices.
- The relative accuracy of the evaluated optical and mechanical digitizers is similar.
