Radiopacity of impression materials using an indirect digital system

Authors

  • Eduardo Gonçalves Mota PUCRS
  • Maria Ivete Bolzan Rockenbach PUCRS
  • Nilza Pereira da Costa PUCRS
  • Angela Rigo PUCRS
  • Carla Renata Radaelli Coelho PUCRS

Keywords:

Optical density, digital dental radiography, dental impression materials

Abstract

Purpose: This in vitro study evaluated the radiopacity of impression materials using an indirect digital system. Methods: Samples of four polyvinyl siloxanes, one polyether, one polysulfide, and one irreversible hydrocolloid were fabricated with 1.0, 1.5, and 3.5mm-thickness. Three samples of different thickness were placed on the Digora optical plate and exposed. The optical density (pixels) was recorded in three areas resulting in a total of 360 measurements. Data were analyzed by 2-way ANOVA and Tukey tests (α=0.05). Results: Significant differences were observed among all materials and thicknesses tested (P<0.001). Irreversible hydrocolloid and polyether showed the lowest optical density. Polysulfide showed the highest optical density under all evaluated conditions. Conclusion: There was a significant difference in optical density for all impression materials tested. Composition changes are suggested to allow radiographic detection and improve safety during clinical use of impression materials. Key words: Optical density; digital dental radiography; dental impression materials

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Published

2008-09-26

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Original Article