This article defines Dandy quality scanning standards for Partial Dentures.
What Makes a Quality Scan
- Sufficient Scan Data
- The Bite
- Distortions and Sitching Errors
Sufficient Scan Data
Having sufficient scan data is crucial to achieving a good-fitting partial and to avoid any holds from the lab that may delay delivery.
What does a good scan vs. a bad scan need?
- Good: The arch is captured in full with no holes, including all surfaces of the teeth
- Good: the attachments, palate, and retromolar pa areas are fully captured
- Good: the interproximal contacts of teeth with spaces between them are fully captured.
- Bad: Holes in the scan or missing scan information on the tissue or teeth
- Bad: Landmarks that assist in retention of the partial are not fully scanned
- Bad: There are holes in the interproximals where there is a large space
The Bite
A good bite is crucial to having partials that follow the same bite and having less occlusal adjustments at delivery.
What is a good vs. bad bite scan?
- Good: Properly aligned bite matches the patient's mouth
- Good: Properly aligned Bite shows accurate wear patterns
- Bad: Bite does not reflect the patient's mouth
- Bad: Bite scans show discrepancies on wear patterns
Distortions and Sitching Errors
Avoiding distortions and stitching errors is crucial to have a great-fitting partial and to avoid delays in production.
What is a usable vs. an unusable scan?
- Good: There are no distortions, holes, or stitching errors in these scans.
- Good: There are no areas of visible overlap or double images.
- Bad: Noticeable holes or distortions in the scans
- Bad: Clear double imaging on a scan step