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Clinical evaluation of high-copper amalgams
T G Berry1, J S Osborne, J B Summitt
1Department of Restorative Dentistry, University of Texas Health Science Center at San Antonio, TX 78284-7890, USA.
American Journal of Dentistry
|June 1, 1995
Summary
Zenith Premium amalgam alloy showed significantly less marginal breakdown than Valiant PhD amalgam alloy after two years. Zenith Premium may offer better long-term clinical performance due to its zinc content.
Area of Science:
- Dental Materials Science
- Clinical Dentistry
Background:
- High-copper amalgam alloys are widely used in dental restorations.
- Understanding the long-term clinical performance of different amalgam formulations is crucial for material selection.
Purpose of the Study:
- To compare the clinical performance of two high-copper amalgam alloys: Valiant PhD and Zenith Premium.
- To evaluate marginal fracture and breakdown of restorations over a two-year period.
Main Methods:
- Class I and II cavity preparations were restored using Valiant PhD and Zenith Premium alloys in patients.
- Restorations were assessed at baseline, 1 year, and 2 years for marginal breakdown.
Main Results:
- Zenith Premium alloy demonstrated significantly less marginal breakdown compared to Valiant PhD alloy after two years.
- No significant additional deterioration was observed in Zenith restorations between the first and second year.
- The presence of zinc in Zenith Premium, unlike Valiant PhD, may explain its superior performance.
Conclusions:
- Zenith Premium alloy exhibits superior marginal integrity compared to Valiant PhD alloy over a two-year period.
- Zenith Premium alloy is predicted to have better long-term clinical performance.
- Amalgam composition, specifically zinc content, influences marginal stability and clinical longevity.
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