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Comparing the Accuracy of Three Different Impression Materials in Making Duplicate Dies
Farshad Bajoghli1, Mahmoud Sabouhi2, Saeid Nosouhian2
1Associate Professor, Department of Prosthodontics, Dental Materials Research Center, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
Journal of International Oral Health : JIOH
|August 1, 2015
Summary
Polyether (PE) impression material, Impergum, demonstrated superior marginal adaptation in duplicating master dies compared to other materials. This finding is crucial for precise cast restorations and preventing issues like plaque retention.
Area of Science:
- Dental materials science
- Prosthodontics
- Impression techniques
Background:
- Accurate marginal adaptation is critical for cast restorations to prevent plaque accumulation and maintain mechanical/esthetic properties.
- Material precision in duplicating master dies directly impacts the fit and longevity of dental prosthetics.
Purpose of the Study:
- To evaluate and compare the precision of three distinct impression materials for duplicating master dies.
- To assess the marginal adaptation accuracy of additional silicone (AS), condensation silicone (CS), and polyether (PE) impression materials.
Main Methods:
- Three master dies were fabricated using polyether (Impergum), condensation silicone (Speedex), and additional silicone (Panasil).
- Nickel-chromium copings were prepared, and marginal differences were measured using a stereomicroscope.
- Thirty duplicate dies were created with each material, and marginal gaps were recorded and analyzed using ANOVA.
Main Results:
- Polyether (Impergum) exhibited the lowest mean marginal difference (38.56 µm) compared to condensation silicone (Speedex, 38.92 µm) and additional silicone (Panasil, 38.24 µm).
- Impergum demonstrated the highest capability in producing accurate duplicate dies, though statistical significance (P > 0.05) was not reached for all comparisons.
Conclusions:
- Impergum (polyether) showed the greatest potential for achieving superior marginal adaptation in duplicate dies.
- Further research is recommended to definitively establish the optimal impression material for precise marginal adaptation in dental restorations.
