Overview: Manage the step-by-step scanning workflow for complete dentures from existing reference dentures using Dandy Chairside software.
Required Arch Scan Data
The required scan data depends on the number of arches being fabricated for the patient.
For additional information, see Scanning Best Practices
Also taking a 360° scan
Single Arch Denture Requirements
One extraoral 360° scan of the existing reference denture.
One intraoral scan of the opposing arch.
Two intraoral bite scans captured from the molar to the midline.
Dual Arch Denture Requirements
One extraoral 360° scan of the existing upper reference denture.
One extraoral 360° scan of the existing lower reference denture.
Two intraoral bite scans captured from the molar to the midline.
Lower Denture Extraoral Scanning Steps
Follow this scan sequence: Intaglio → Borders → Occlusal → Cameo.
Intaglio: Begin scanning on the intaglio surface of the lower denture.
Borders: Use a “rocking and rolling” motion to move the scanner from the intaglio toward the border, then roll the scanner back toward the intaglio. Repeat the rocking and rolling motion until the entire peripheral border is scanned.
Cameo: Rock the scanner from the buccal border toward the buccal/facial tooth surface, then roll the scanner back toward the border. Repeat the rocking and rolling motion until all buccal/facial surfaces are scanned.
Occlusal: Rock the scanner from the buccal tooth surface to the occlusal then lingual tooth surfaces, then roll the scanner back toward the occlusal. Repeat the rocking and rolling motion until all anatomical tooth surfaces are scanned.
Evaluate: Check the scan for missing data and rescan the lower denture as needed.
Upper Denture Extraoral Scanning Steps
Follow this scan sequence: Intaglio → Borders → Occlusal → Cameo.
Intaglio: Begin scanning on the intaglio surface of the upper denture. Sweep the scanner from side to side to scan the majority of the palate.
Borders: Use a “rocking and rolling” motion to move the scanner from the intaglio over the border, then roll the scanner back toward the intaglio. Repeat the rocking and rolling motion until the entire peripheral border is scanned.
Cameo: Rock the scanner from the buccal border toward the buccal/facial tooth surface, then roll the scanner back toward the border. Repeat the rocking and rolling motion until all buccal/facial surfaces are scanned.
Occlusal: Rock the scanner from the buccal tooth surface to the occlusal then lingual tooth surfaces, then roll the scanner back toward the occlusal. Repeat the rocking and rolling motion until all anatomical tooth surfaces are scanned.
Evaluate: Check the scan for missing data and rescan the upper denture as needed.
Techniques for 360 Extraoral Scanning
Utilize these techniques to improve the quality of the 360° extraoral scan.
Hold the prosthesis in the non-dominant hand and the scanner in the dominant hand.
Manipulate the scanner and the denture simultaneously.
Pause the scanner frequently to evaluate the scan data for discrepancies or distortion.
Restart the scanner on a previously scanned area to allow the software to recognize existing data before moving to missing areas.
Use the Stone View tool for better visualization of distortions.
Apply the Twist Technique to scan undercuts on the flanges.
Patient Bite Scan Procedure
Follow these steps to capture the bite with the dentures in the patient's mouth.
Place the dentures back into the patient’s mouth.
Set the bite with blue bite registration material to prevent movement during scanning.
Starting on the posterior teeth, wave the scanner wand up and down to capture at least 2-3 millimeters of the vestibule.
Select Next Bite and repeat the process for the second bite scan.
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If scans do not automatically align, manually align the arch scans or select Reset to repeat the bite scan.
Scan Review and Accuracy Verification
Confirm the accuracy of the scans on the Review page before starting the order.
Occlusion: Confirm the patient's occlusion is correct in the software.
Data Integrity: Confirm there is no distortion or missing data in the scan.
Stone Tool: Use the Stone tool to evaluate the scan for distortions.
Annotate Scans: Use the Annotate tool to edit screenshots and send notes to the designer.
Rescan: Select A scan looks bad? Re-scan it if corrections are needed.