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ORIGINAL ARTICLE
Year : 2015  |  Volume : 18  |  Issue : 1  |  Page : 115-119

Changing the bonding force of impression tray to edentulous maxillary jaw simulator with impression valve system: In vitro study


1 Department of Prosthodontics, Faculty of Dentistry, University of Abant Izzet Baysal, Bolu, Turkey
2 Department of Prosthodontics, Faculty of Dentistry, University of Kirikkale, Kirikkale, Turkey

Correspondence Address:
Y Z Akpinar
Department of Prosthodontics, Faculty of Dentistry, University of Abant Izzet Baysal, Bolu
Turkey
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/1119-3077.146992

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Objective: The aim of this study was to evaluate the effect of an impression valve system (IVS) on the bonding force between an impression tray and an edentulous maxillary jaw. Materials and Methods: In this in vitro study, a polyether-coated maxillary jaw simulator (PM) was used to model an edentulous maxillary jaw. The IVS was placed into individual impression trays. An irreversible hydrocolloid impression was taken of the PM when the IVS was open and closed. The impression tray bonding force was measured using a digital dynamometer. Student's t-test was used to determine the significance of the difference between these two groups. Results: The impression tray was more easily separated from the PM when the IVS was open (108 ± 3.9 N). The separation was more difficult when the IVS was closed (153.7 ± 14.2 N). The difference between these two findings (P = 0.000) was significant. Conclusion: The use of an IVS facilitates the removal of the impression tray from the mouth when taking impressions from an edentulous maxillary jaw.


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