Acceptable ImpressionBoth upper and lower impressions are required for processing a case.
Impression material should have a longer shelf life, should be able to capture details and also withstand multiple pours without damaging the details.
A number of materials can be used. Polyether and polyvinyl siloxane impression materials are the recommended materials of choice.
Two step PVS impression material gives the best results when taken with a metal perforated impression tray. The impressions are to be shipped WITH the trays.
Dear Doctor, Please find mentioned quality specifications and guidelines for elastomeric impressions required by ClearPath.
- Elastomeric Impression to be taken in two-step technique
- BLOCK DEEP UNDERCUTS before taking impressions
- All dental work should be completed before taking impressions for ClearPath
- NO tray exposure should be there at cuspal heights or incisal edges
- EXCESSIVE putty shows through should not be present
- All details TILL THE LAST MOLAR in all quadrants should be recorded
- No breakage of inter-dental margins especially in the lower anterior region
- No presence of “pull away” of heavy body from tray
- Review the Timing, Moisture Control, Proper Tray Selection and Technique
- When in doubt, repeat the impression and send multiple impressions
- Please use local made inexpensive metallic trays as they are kept till end of treatment for records and wont be sent back with the aligners
- Even for Single arch case, both the impressions are required
The impression should be perfect and flawless. Quality and fit of aligners depend solely on impression quality and details recorded.