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Restorative pulpal and repair responses
P E Murray1, I About, J C Franquin
1School of Dentistry, University of Birmingham, St. Chad's Queensway, Birmingham, England, B4 6NN. p.e.murray@bham.ac.uk
Journal of the American Dental Association (1939)
|April 24, 2001
Summary
Dental restorative materials vary in their ability to prevent bacterial microleakage and support pulpal healing. Resin-modified glass ionomers (RMGI) showed the best seal, while zinc oxide-eugenol (ZnOE) best minimized inflammation.
Area of Science:
- Restorative Dentistry
- Dental Materials Science
- Cariology
Background:
- Millions of dental restorations are placed and replaced annually in the US.
- Controversy exists regarding pulpal reactions and bacterial microleakage with common restorative materials.
- Understanding material-specific pulpal responses is crucial for effective clinical practice.
Purpose of the Study:
- To compare pulpal reactions to various dental restorative materials.
- To evaluate bacterial microleakage associated with different materials.
- To assess the impact of restorative materials on pulpal health and repair.
Main Methods:
- Restoration of 272 teeth with Class V cavities using six different materials/linings.
- Histomorphometric analysis of pulpal responses and bacterial presence.
- Evaluation of responses based on international dental standards.
Main Results:
- Resin-modified glass ionomers (RMGI) demonstrated superior prevention of bacterial microleakage.
- Zinc oxide-eugenol (ZnOE) was most effective in minimizing pulpal inflammatory activity.
- Calcium hydroxide (Ca(OH)2) best supported odontoblast survival in deep preparations, while RMGI performed poorly.
Conclusions:
- Dental restorative materials significantly influence bacterial microleakage and pulpal responses.
- Clinical recommendations include using RMGI for shallow/moderate cavities and Ca(OH)2 lining for deep cavities.