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Updated: May 14, 2026
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Accuracy in Dental Medicine, A New Way to Measure Trueness and Precision
Published on: April 29, 2014
[Quantitative evaluation for the accuracy of dental model three-dimensional scanner]
Yang Song1, Yu-chun Sun, Yi-jiao Zhao
1Peking University School, Beijing, China.
Summary
A new quantitative method accurately evaluates dental 3D scanner accuracy, confirming the 3Shape D700 scanner meets high precision standards for dental models. This approach minimizes manual errors in digital dentistry.
Area of Science:
- Digital Dentistry
- Metrology
- Biomedical Engineering
Background:
- Accurate digital models are crucial for modern dental prosthetics and treatments.
- Quantitative evaluation of dental 3D scanner accuracy is essential for reliable digital workflows.
Purpose of the Study:
- To establish a robust quantitative method for evaluating dental 3D scanner accuracy.
- To assess the performance of the 3Shape D700 scanner, focusing on accuracy as a key indicator.
Main Methods:
- A standard geometric model simulating a dental arch was designed using 3D reverse software.
- The model was fabricated using high-precision CNC processing.
- Key performance indicators including single scanning accuracy, space consistency, and rescan accuracy were evaluated.
Main Results:
- The 3Shape D700 scanner achieved a single scanning accuracy of (15.00±10.84) μm, comparable to the manufacturer's specification of 20 μm (P=0.053).
- No statistically significant differences were found in space consistency (P=0.524) or rescan accuracy (vertical: P=0.633, horizontal: P=0.221).
Conclusions:
- The developed method provides a feasible and objective approach for evaluating dental 3D scanner accuracy.
- This quantitative method effectively reduces observer error associated with manual point selection in scanner calibration.
