Abstract: Objective: To test the border sealing efficiency of a new complete denture edge shaping impression material. Methods: By precisely controlling the proportion of paraffin, polyethylene oligomer and plasticizer according to the formula in relevant patent, the material softening temperature was maintained at about 37 ℃. Twenty-three edentulous patients were selected and each of them was respectively shaped with traditional modeling compound and the new edge shaping material during taking impression. Impression retention of the individual tray with edge shaping was recorded. Results: There was no significant difference in the retention of individual trays between the new edge shaping material and impression compound (P>0.05). Conclusion: The new edge shaping material has a convenient operation ability and satisfied consistency, which showed great border sealing, thus providing an alternative in edge shaping of complete denture.

Key words: Complete denture, Impression, Edge shaping