Purpose: This study developed a procedure to minimize the distortion of impressions.
Materials and Methods: The inner surface of the tray is abraded with powder or paper points, and vents are made at the top of the narrow space in the tray. The adhesive is applied and allowed to dry for 15 minutes. Any unnecessary undercuts are blocked out with soft wax, and impression material is injected into the narrow space in the tray.
Discussion: This recommended procedure maximizes the adhesive strength between the impression material and the tray, minimizes the amount of air trapped between the impression material and tray, and eliminates large undercuts.
Conclusion: This procedure was effective at minimizing the distortion of impressions.