Digital Impression Accuracy Calculator
Accuracy comparison across scanning technology.
Medical Disclaimer
This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. Never disregard professional medical advice or delay seeking it because of results from this tool.
Inputs
Results
Trueness (um)
76
Precision (um)
55
How to Use This Calculator
- Select Scan Extent (single tooth, quadrant, full arch) to set baseline accuracy.
- Rate Moisture Control and Margin Depth for the clinical condition.
- Select Scanner Generation and Operator Experience level.
- Enter the number of Prepared Teeth in the scan and Ambient Light conditions.
- Review Trueness, Precision, and Estimated Marginal Gap to assess scan quality.
How the result changes with Margin depth (mm sub-g)
| Margin depth (mm sub-g) | Trueness (um) | Precision (um) |
|---|---|---|
| 0.5 | 76 | 55 |
| 1.75 | 101 | 72.5 |
| 3.25 | 131 | 93.5 |
| 4.5 | 156 | 111 |
What each input means
- Scan extent
- Select scan extent.
- Moisture control
- Select moisture control level.
- Margin depth (mm sub-g)
- Subgingival margin depth in mm (0 = supragingival, 0.5-1 mm typical).
- Scanner generation
- Select scanner generation.
- Operator experience
- Select operator experience level.
- Prepared teeth in scan
- Number of prepared teeth being captured.
- Ambient light
- Select ambient light conditions.
What each result means
- Trueness (um)
- Expected trueness (systematic error) in micrometers — lower is better.
- Precision (um)
- Expected precision (repeatability) in micrometers.
- Est. marginal gap (um)
- Estimated restoration marginal gap (<120 um acceptable, <60 um ideal).
- Crown fit acceptable (1/0)
- 1 if estimated marginal gap is within clinically acceptable range (<120 um).
- Crown fit ideal (1/0)
- 1 if estimated marginal gap is within ideal range (<60 um).
- Implant fit acceptable (1/0)
- 1 if trueness supports passive implant fit (<50 um).
- Accuracy grade (1-4)
- 4=A (<25um), 3=B (25-45um), 2=C (45-70um), 1=D (>70um).
- vs. analog PVS (um)
- Accuracy advantage over traditional PVS impression (positive = digital is better).
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersScan extent = 2, Moisture control = 1, Margin depth (mm sub-g) = 0.5, Scanner generation = 1 = 7 input(s) provided
- Calculate Trueness76 = 76
- Calculate Precision55 = 55
- Calculate Est. marginal gapEst. marginal gap = trueness * 2.5190 = 190
- Calculate Crown fit acceptable0 = 0
Related Calculators
The questions that sit next to this one — chosen by subject, including calculators filed under a different category.
Digital Scanner Comparison Calculator
Intraoral scanner cost and feature comparison.
Dental TechnologyCAD/CAM Restoration Calculator
Same-day crown cost: equipment, material, and time.
Dental PracticeDental Equipment ROI Calculator
Calculate the return on investment for dental equipment purchases like CBCT, intraoral scanners, and lasers.
Dental TechnologyPractice Technology ROI Calculator
Revenue from technology investment in digital dentistry.
More in Medical & Clinical.