Definition and Uses One-step impressions are when the heavy/medium and light body is loaded into the impression tray at the same time for the impression. Impressions are taken when submitting a case and whether you take one-step or two-step impressions is entirely up to you as the doctor and what is your preference. Parts Needed The […]
Category Archives: Impressions & Intraoral scanning
Definition A two step impression is when an impression is taken twice, the first time with heavy/medium body, then when that material is set, the second step is to add light body over the VPS putty for another impression. Uses Impressions are taken when submitting a case and whether you take one-step or two-step impressions is […]
The Following is a comprehensive list of the specific impression problems and procedural errors, their causes and how to avoid them. We will also show you the image of the impression itself compared to its digital model, for increased clarity of each issue. Impression problems Voids Bubbles Thin walls Double imprints (aka Shifts) Pulls Tears […]
Definition Desirable vs. undesirable undercuts Mosby’s Dental Dictionary defines an undercut as “the portion of a tooth that lies between its height of contour and the gingiva, only if that portion is of less circumference than the height of contour.” Undercuts exist because of natural tooth morphology and contours. Aligners rely on these naturally-occurring desirable undercuts for normal […]
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