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Histological evaluation of a self-priming etchant adhesive system
Charles F Cox1, Kwang-Mahn Kim, Richard G Stevenson
1Section of Endodontics, Department of Restorative Dentistry, University of California, Los Angeles School of Dentistry, Los Angeles, California, USA.
Compendium of Continuing Education in Dentistry (Jamesburg, N.J. : 1995)
|December 25, 2003
Summary
Vital dentin protects against hypersensitivity and bacterial leakage. Following cavity preparation and restoration, dental pulps heal and deposit reparative dentin, with varying results depending on the restorative material used.
Area of Science:
- Dentistry
- Dental Materials Science
- Oral Biology
Background:
- Vital dentin serves as a crucial barrier against hypersensitivity and bacterial microleakage, which can cause recurrent caries and pulp inflammation.
- Cavity preparation and air-drying can displace cells into dentinal tubules, but pulpal healing and reparative dentin deposition occur within two weeks post-restoration.
Purpose of the Study:
- To evaluate the pulp healing response to cavity preparation and restoration using a total-etch system versus a calcium hydroxide control.
- To compare the effectiveness of different restorative systems in promoting pulpal recovery and reparative dentin formation.
Main Methods:
- Class V cavities were prepared in adult monkey teeth using ultra-high-speed preparation with water spray.
- Teeth were restored with either a total-etch system or a calcium hydroxide control and observed at three International Standardization Organization (ISO) time intervals.
- Pulp tissues were collected and analyzed following established histological procedures.
Main Results:
- Minor odontoblastic disruption was observed in a few pulps at 7 days post-cavity preparation.
- No significant pulp inflammation was detected with any restorative system at intermediate and long-term observation periods.
- The one-bottle Tyrian system showed less reparative dentin deposition compared to the calcium hydroxide control and the total-etch system.
Conclusions:
- Dental pulps demonstrate a healing capacity following cavity preparation and restoration, with minimal inflammation observed across tested systems.
- The choice of restorative material can influence the extent of reparative dentin deposition, suggesting material-specific effects on pulpal healing.