![]() ![]() The polyvinyl siloxane 2-step, 2-mm, relief putty-wash impression technique was the most accurate for fabricating stone dies. Overall discrepancies of the 2-step technique with 2-mm relief putty-wash impression technique were significantly smaller than that in the 1-step and polyethylene putty-wash impression techniques. One-way analysis of variance showed statistically significant differences among the 3 putty-wash impression techniques, for all intraabutment and interabutment measurements (P <.001). 2, Impregum Penta Double Pack EXPORT PACKAGE Medium Body Polyether Impression, 5 stars (64. ![]() Accuracy was assessed by measuring 6 dimensions (intraabutment and interabutment) on stone dies poured from impressions of the master model. VPS Impression Material, 4.7 stars (98 reviews), 25.13. and precise impressions every time you use it, no matter which technique you use. The impression material is liquid or semi-solid when first. It is made by placing an appropriate material in a dental impression tray which is designed to roughly fit over the dental arches. For each technique, 15 impressions were made of a stainless steel master model that contained 3 complete crown abutment preparations, which were used as the positive control. Genie VPS Impression Material (Sultan) Vinyl Polysiloxane Cartridge. Vinyl Polysiloxane Impression Materials (VPS) are hydrophilic materials used for dental and gingiva impressions that enable a dentist to capture highly. A dental impression is a negative imprint of hard and soft tissues in the mouth from which a positive reproduction, such as a cast or model, can be formed. In the second step, the wash stage was carried out) and (3) 2-step technique with a polyethylene spacer (plastic spacer used with the putty impression first and then the wash stage). The 3 putty-wash impression techniques used were (1) 1-step (putty and wash impression materials used simultaneously) (2) 2-step with 2-mm relief (putty first as a preliminary impression to create 2-mm wash space with prefabricated copings. This study assessed the accuracy of 3 putty-wash impression techniques using the same impression material (polyvinyl siloxane) in a laboratory model. There is much discussion in the dental literature concerning the effect of the impression technique on the accuracy of cast restorations.
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