Tech Tip: Impression Materials

When submitting a case with physical impressions, we only accept PVS impressions on disposable trays. For more information on best practices with taking impressions, see the full article here

Per our terms and conditions, alginate impressions, stone models, and metal impression trays will be rejected. These and all other submitted materials become the property of ClearCorrect and will not be returned.

To clarify the reasons for this:

  • Alginate dries out and the material itself can shrink or expand depending on environmental factors. This can make the aligner too big or too small, depending on any changes.
  • Stone models don’t always survive the shipping process. We usually see some sort of chipping, especially along the cusps/incisal edges. Sometimes this can be a whole tooth, but most of the time it will be something minor that’s hard to detect but can still cause fitting issues.
  • Additionally, with stone models, we can’t control the quality of the stone model. The impression can be perfect, but if the pour-up is bad the scan will be compromised. Things like air bubbles can be filled in, but it leaves us guessing at what the shape of the tooth is actually like.
  • Metal trays cannot be run through our scanner, requiring a pour up process which, as mentioned above, is prone to error. 

We hope this helps to clarify why these materials will be rejected. If you have any further questions, feel free to check out the articles relating to this in our help center.

You may also contact our support team at support@clearcorrect.com or at 888-331-3323. 

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