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Creep versus microstructure of gamma2-containing amalgams.
Journal of Dental Research
|December 1, 1977
Summary
The study found that increasing the grain size of the silver-mercury (Ag-Hg) phase, also known as gamma1, in amalgams significantly reduces creep. This microstructural characteristic is a key factor in amalgam behavior.
Area of Science:
- Materials Science
- Dental Materials
Background:
- Dental amalgams are widely used restorative materials.
- Understanding factors influencing amalgam creep is crucial for long-term clinical success.
Purpose of the Study:
- To analyze the relationship between creep and microstructural characteristics in gamma2-containing amalgams.
- To identify predominant microstructural factors affecting amalgam creep.
Main Methods:
- Analysis of microstructural characteristics of several gamma2-containing amalgams.
- Correlation of these characteristics with measured creep rates.
Main Results:
- The grain size of the silver-mercury (Ag-Hg) phase (gamma1) was identified as a predominant factor influencing creep.
- An increase in gamma1 grain size was directly correlated with a reduction in creep.
Conclusions:
- Gamma1 grain size is a critical microstructural determinant of creep in these amalgams.
- Controlling gamma1 grain size offers a potential strategy to minimize amalgam creep.