Related Experiment Video
Updated: Dec 18, 2025
07:57
Accuracy in Dental Medicine, A New Way to Measure Trueness and Precision
Published on: April 29, 2014
13.8K
Accuracy of data obtained from impression scans and cast scans using different impression materials
International Journal of Computerized Dentistry
|June 20, 2020
Summary
High-precision impression materials combined with impression scans yield the most accurate digital data for CAD/CAM workflows. This study evaluated various materials and scanning methods for dental prostheses.
Area of Science:
- Dental materials science
- Digital dentistry
- Computer-aided design/computer-aided manufacturing (CAD/CAM)
Background:
- Indirect digitization of dental impressions and casts is crucial for CAD/CAM workflows.
- Intraoral scanning (IOS) is increasingly adopted, but traditional methods remain prevalent.
Purpose of the Study:
- To evaluate the accuracy of digital data obtained from scanning conventional dental impressions and casts.
- To compare the influence of different impression materials and cast types on data accuracy.
Main Methods:
- A standardized titanium model for a four-unit fixed dental prosthesis (FDP) was used.
- Four impression materials (polyether and three polyvinyl siloxanes) were tested.
- Data were acquired from impressions and unsectioned/sectioned plaster casts, then digitized and compared to a reference dataset using computed tomography (CT).
Main Results:
- Imprint 4 Penta demonstrated the highest overall accuracy.
- Imprint 4 Preliminary Penta Super Quick showed the lowest accuracy.
- Impression scans using Impregum Penta and Imprint 4 Penta yielded superior results compared to cast scans.
Conclusions:
- Scanning conventional impressions with high-precision materials provides the most accurate data for CAD/CAM applications.
- Material selection significantly impacts the accuracy of digital impressions.
