Clinical Behavior of o-Ethoxybenzoic Acid-Eugenol-Zinc Oxide Cements

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Abstract
Cements containing Zn o-hydrogenated rosin powder and o-ethoxybenozic acid (EBA)-eugenol liquid, which were previously tested in the laboratory and found to have improved physical properties compared to commonly used Zn o-eugenol cements, were evaluated clinically for possible use as temporary fillings, bases, sedative restorations, and pulp-capping materials. Fillings of EBA-containing cements wore excessively, and the clinical findings showed no correlation with laboratory results obtained for solubility, disintegration, and abrasion. However, symptomatic teeth without pulp exposures lost their symptoms and remained vital when restored with EBA cement. On pulp-capping none of the very limited number of patients reported any symptoms. None of the teeth showed any radiographic changes, and all responded normally to vitality tests. The cements appear promising as improved sedative bases and as pulp-capping and cementing media.

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