The effect of disinfectants on dimensional stability of addition and condensation silicone impressions
Background/Aim. Dimensional stability and accuracy of an impression after chemical disinfection by immersion in disinfectants are crucial for the accuracy of final prosthetic restorations. The aim of this study was to assess the deformation of addition and condensation silicone impressions...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Ministry of Defence of the Republic of Serbia, University of Defence, Belgrade
2014-01-01
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| Series: | Vojnosanitetski Pregled |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0042-8450/2014/0042-84501300037S.pdf |
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| Summary: | Background/Aim. Dimensional stability and accuracy of an impression after
chemical disinfection by immersion in disinfectants are crucial for the
accuracy of final prosthetic restorations. The aim of this study was to
assess the deformation of addition and condensation silicone impressions
after disinfection in antimicrobial solutions. Methods. A total of 120
impressions were made on the model of the upper arch representing three full
metal-ceramic crown preparations. Four impression materials were used: two
condensation silicones (Oranwash L - Zhermack and Xantopren L Blue - Heraeus
Kulzer) and two addition silicones (Elite H-D + regular body - Zhermack and
Flexitime correct flow - Heraeus Kulzer). After removal from the model the
impressions were immediately immersed in appropriate disinfectant
(gluta-raldehyde, benzalkonium chloride - Sterigum and 5.25% NaOCl) for a
period of 10 min. The control group consisted of samples that were not
treated with disinfectant solution. Consecutive measurements of identical
impressions were realized with a Canon G9 (12 megapixels, 2 fps, 6x/24x), and
automated with a computer Asus Lamborghini VX-2R Intel C2D 2.4 GHz, by using
Remote Capture software package, so that time-depending series of images of
the same impression were obtained. Results. The dimensional changes of all
the samples were significant both as a function of time and the applied
disinfectant. The results show significant differences of the obtained
dimensional changes between the group of condensation silicones and the group
of addition silicones for the same time, and the same applied disinfectant (p
= 0.026, F = 3.95). Conclusion. The greatest dimensional changes of addition
and condensation silicone impressions appear in the first hour after their
separation from the model. |
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| ISSN: | 0042-8450 |