Related Experiment Videos
Comparison of dye and ion microleakage tests
L A Mueninghoff1, S K Dunn, K F Leinfelder
1University of Alabama, School of Dentistry, Birmingham.
American Journal of Dentistry
|October 1, 1990
Summary
Basic fuchsin dye is a more reliable indicator of dental restoration microleakage than pH paper over time. Dye penetration accurately detects leakage longer, even after hydroxyl ion detection diminishes.
Area of Science:
- Dental Materials Science
- Restorative Dentistry
Background:
- Basic fuchsin dye is a standard for assessing dental restoration microleakage.
- Hydroxyl ions from cavity liners (e.g., Dycal) are a newer method to study in vivo microleakage.
Purpose of the Study:
- To correlate the effectiveness of basic fuchsin dye and hydroxyl ion detection in measuring dental restoration microleakage.
- To evaluate the long-term dependability of these two microleakage assessment systems.
Main Methods:
- Human teeth with calcium hydroxide liners were restored and subjected to thermocycling.
- Microleakage was assessed using pH indicating paper to detect hydroxyl ions.
- The same samples were re-tested with basic fuchsin dye after further thermocycling.
- Sectioned teeth were ranked based on dye penetration levels.
Main Results:
- pH testing for hydroxyl ions showed a decrease in positive results over 18 weeks.
- Basic fuchsin dye consistently detected microleakage throughout the 18-week period.
- Dye penetration values remained stable, indicating persistent microleakage.
Conclusions:
- Basic fuchsin dye remains a dependable method for detecting microleakage in dental restorations.
- Dye penetration is superior to hydroxyl ion detection for assessing aged restorations.
- Basic fuchsin dye offers a more persistent and reliable measure of microleakage over time.