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Cavity Bases Revisited
Naji Ziad Arandi1, Tarek Rabi2
1Department of Conservative Dentistry and Prosthodontics, Faculty of Dentistry, Arab American University, Jenin, Palestine.
Clinical, Cosmetic and Investigational Dentistry
|August 18, 2020
Summary
Evidence for routine cavity bases is limited. Resin-modified glass ionomers (RMGI) are preferred over zinc oxide eugenol (ZOE) for protective bases in deep cavities, while shallow preparations may not require bases.
Area of Science:
- Dental Materials Science
- Restorative Dentistry
Background:
- Cavity bases are used in dental restorations for pulp protection.
- Zinc oxide eugenol (ZOE) and resin-modified glass ionomers (RMGI) are common materials for cavity bases.
Purpose of the Study:
- To review the literature on cavity bases.
- To focus on the comparative roles of ZOE and RMGI as cavity bases.
Main Methods:
- Literature search conducted from 1970-2020.
- Databases searched include Scopus, PubMed, and Google Scholar.
- Keywords: cavity liners, bases, pulp protection, ZOE, RMGI.
Main Results:
- Limited evidence supports routine use of bases under amalgam or composite restorations.
- Shallow and moderate cavities may not require lining or bases.
- RMGI can serve as a protective base with calcium hydroxide in deep cavities.
Conclusions:
- The use of cavity bases should be re-evaluated, favoring "no more lining or bases" in many cases.
- Resin-modified glass ionomers are suitable and recommended cavity base materials.
- Bonded RMGIs should replace ZOE in daily practice.
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