Related Experiment Video
Updated: Feb 8, 2026
Accuracy in Dental Medicine, A New Way to Measure Trueness and Precision
Published on: April 29, 2014
Accuracy (trueness and precision) of dental models fabricated using additive manufacturing methods
Objective:
This study evaluated the accuracy (trueness and precision) of dental models fabricated using additive manufacturing (AM) methods such as PolyJet and fused deposition modeling (FDM).
Materials And Methods:
10 stone models were acquired for the control group by scanning a complete arch model. For the experimental groups, 10 PolyJet models and 10 FDM models were fabricated from digital impressions using an intraoral scanner. All 30 models were then scanned, and root mean square values were measured using three-dimensional (3D) analysis software.
Results:
Trueness did not significantly differ between the stone and PolyJet models. The precision of the AM models was significantly higher than that of the stone models. The layer thicknesses of the FDM models were greater than those of the PolyJet models.
Conclusion:
The results of this study show that it might be possible for the dental models fabricated using additive manufacturing methods to be used in clinical settings.
Related Concept Videos
03:37Uncertainty in Measurement: Accuracy and Precision
01:52Accuracy and Precision
02:07Improving Translational Accuracy
02:07Improving Translational Accuracy
01:27Conjugate Addition (1,4-Addition) vs Direct Addition (1,2-Addition)
Conjugate addition results in a thermodynamically stable product. The reaction retains the stronger C=O bond at the expense of the weaker C=C π bond. The process is slow as the β carbon is less electrophilic than the carbonyl carbon.
Direct addition products are...
01:26Steel Manufacturing
During this smelting process, limestone plays a crucial role by forming slag. Slag captures impurities within the molten iron, such...