Intraoral Scanner Scan Data Quality Issue (i500, i600, i700, i700 wireless, i900, i900c)

Symptoms

• Excessive noise data occurs during scanning, or the scan feels sluggish.
• After scanning, the processing result appears bumpy or has wave-like noise.
• Scan accuracy is reduced, resulting in a poor fit of the prosthesis. 

Solution

The solutions are listed in order of ease for users to perform. Further steps may require assistance from a partner or professional.
 

1. Scan a dental model to check the noise level.

Use a low-reflection dental stone model to reduce intraoral variables and verify noise generation.

If there are no issues with the dental model, proceed with the actual scan according to the Scanning Checklist and Scan Strategy.   

Scan Checklist       Scan Strategy

2. Re-perform Calibration.

3. Check Live View

During scanning, check for real-time noise or excessive filtering. (You can also use Scan Replay from the Main Tool Bar.)
 

Scan Replay

A dirty scanner tip or optical window can cause severe noise.

(See comparison image. Scan of the same model using the same scanner.)

To inspect in Live View, scan with the scanner tip positioned in a dark area.
 

Stain → optical window contamination

Scratch → mirror surface scratched

Clean	Stain	Scratch

The examples below are cases of heavily contaminated mirror of the tip. (Weak water stains are fine.)

Fingerprints mainly cause contamination of the optical window, and contamination and scratches on the tip mirror can occur during incorrect cleaning, disinfection, and sterilization.

If contaminated, clean the tip properly.

Never disassemble or clean internal optical components yourself—refer to expert guidelines.

Cleaning, Disinfection, Sterilization Procedure - Handpiece (i500, i600, i700, i700 wireless)

Cleaning, Disinfection, Sterilization Procedure - Handpiece (i900, i900 classic)

If scratched, replace the scanner tip.

4. Update graphics card driver to the latest version.

Use the official NVIDIA site. (NVIDIA Experience may require an account and may fail.)

5. Configure NVIDIA Control Panel.

In the NVIDIA Control Panel, enable the graphics card to operate at full performance.

NVIDIA Control → Manage 3D settings → Global settings

• Preferred graphics processor → Select "High-performance NVIDIA processor"
  
• Settings → Power Management mode → Select "Prefer maximum performance"