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Dimensional Stability and Acuracy of Silicone - Based Impression Materials Using Different Impression Techniques - A
Summary
High-quality dental impressions are crucial for fixed prosthodontics. Addition silicones offer superior dimensional stability and accuracy compared to condensation silicones, though research methodologies vary.
Area of Science:
- Dental Materials Science
- Prosthodontics
Background:
- Accurate dental impressions are essential for successful fixed prosthodontic restorations.
- Elastomeric impression materials' properties, like dimensional stability and accuracy, are critical.
- Impression techniques significantly influence the final outcome.
Purpose of the Study:
- To review scientific literature on silicone impression materials and techniques.
- To evaluate the impact of various factors on impression dimensional stability and accuracy.
- To compare addition silicones with condensation silicones.
Main Methods:
- Literature search of scientific papers from 2002-2016.
- Selection based on materials, sample size, technique, storage, measurements, and spacer use.
- Analysis of factors affecting dimensional stability and accuracy.
Main Results:
- Several factors influence silicone impression mold stability and accuracy: viscosity, thickness, technique, retention, storage, hydrophilicity, byproducts, and polymerization/thermal contraction.
- Lack of standardization and diversity in research methodologies were noted.
- Addition silicone demonstrated superiority over condensation silicone.
Conclusions:
- Addition silicone is superior to condensation silicone for dental impressions.
- Standardization of research methods is needed for more consistent findings.
- Material choice and technique are critical for achieving accurate dental impressions.
