Objectives: The aim of this study was to investigate the pressure on the occlusal surface of a prepared molar tooth and its sulcus area during a corrective impression procedure. Methods: Pressure measurements (n=7 per method) for different materials (Silaplast/Silasoft N (SN), Optosil P plus/Xantopren L (XL), Detaseal classic/Detaseal quick (DQ), Dimension Penta H/Dimension Garant L (DGL), Dimension Penta H exp.II/Dimension Garant L exp.II (DGX), Flexitime Easy Putty/Correct Flow (CF)) and processings of the preliminary impression (spillways, only undercuts removed) were conducted using calibrated relative pressure sensors (channel 1: occlusal/ channel 2: sulcus) installed into a pseudo-realistic in vitro model. Results: Statistical evaluation (MANOVA, a=0.05) revealed significant effects for materials as well as for methods (Wilks' Lambda <.0001). Data for maximum pressure values and significance of differences (method: spillways) are lined up in the table below. Conclusions: For all materials, spillways are capable to reduce the internal pressure and initial deformation of the preliminary impression material before corrective material starts to set.
11:00 AM-12:15 PM, Saturday, 9 March 2002 San Diego Convention Center Exhibit Hall C
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Back to the IADR/AADR/CADR 80th General Session (March 6-9, 2002)