For cases with gold or metal prostheses, the system requires a lot more scan data than when scanning natural teeth. Here are some things to note when scanning shiny objects with the i500.
If you try to scan a metal prosthesis in the same way as when scanning natural teeth, the acquired scan data will be insufficient because diffuse reflection occurs on its shiny surface. It is, therefore, needed to perform additional scanning on a metal prosthesis.
First, build up the base scan data by performing the standard scanning strategy — scanning from the occlusal surface to the lingual side and finally to the buccal side. Then, perform additional scanning on the metal prostheses.
Lower the filtering level to  before scanning the metal prostheses. By doing so, the system will be able to acquire more data than when scanning with high-level filtering. However, the scan data is likely to have more noise data as a by-product of filtering level . Therefore, soft tissue retraction should be appropriately maintained while scanning.
It is also recommended to set the model display mode to Texture off while scanning to enable the user to spot noise areas more easily.
Make sure to acquire as much scan data as possible by varying the angle of the tip around the metal prosthesis. Once additional scanning is complete, optimize the scan data.
💡If the system seems to be unable to acquire scan data despite additional scanning, it is recommended to use a scan spray to reduce the diffuse reflection. Be sure to apply an even layer of spray with minimal thickness, lest the thickness of the layer affect scan data accuracy.
Examine the scan data after optimization.