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Amalgam as a restorative material: is there anything new?
1University of Windsor, Ontario, Canada.
Journal of Esthetic Dentistry
|March 1, 1992
Summary
Indium-admixed dental amalgam (Indisperse) shows improved strength, corrosion resistance, and reduced mercury release. A 5-year clinical study confirmed lower marginal breakdown compared to indium-free amalgams.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Restorative Dentistry
Background:
- Dental amalgams are widely used restorative materials.
- Dispersed-phase amalgams offer improved properties over traditional ones.
- Concerns exist regarding mercury release and marginal integrity.
Purpose of the Study:
- To review the properties of a novel dispersed-phase amalgam with admixed indium (Indisperse).
- To evaluate the impact of indium on amalgam's mechanical, corrosion, and mercury release characteristics.
- To assess the clinical performance of Indisperse regarding marginal breakdown.
Main Methods:
- Laboratory testing of Indisperse amalgam properties.
- Evaluation of strength, creep, and corrosion resistance.
- A 5-year clinical study comparing Indisperse to conventional dispersed-phase amalgams.
Main Results:
- Indium addition significantly enhanced amalgam strength and corrosion resistance.
- Mercury release from Indisperse was markedly reduced.
- Indisperse demonstrated a lower frequency of marginal breakdown in clinical use.
Conclusions:
- Admixed indium in dispersed-phase amalgam (Indisperse) offers substantial material property improvements.
- Indisperse exhibits superior clinical performance with reduced marginal breakdown.
- Indium-containing amalgams represent a promising advancement in dental restorative materials.