Abstract
The purpose of this study was to determine the pulpal response to the calcium hydroxide base Procal (3M) on human primary dental pulp.
Sixteen intact primary teeth ranging between 4-9 years of age were studied in this experiment. Class 5 cavities were prepared under constant air-water coolant, using a No.35 inverted cone carbide bur rotating at high speed. Calcium hydroxide base Procal was applied to the cavity floor. Subsequently, composite resin Adaptic ( Johnson & Johnson) was placed into the cavities. The teeth were observed clinically and then removed. The teeth were processed routinely in serial sections, then stained, and evaluated microscopically. All specimens were found to be entirely asymptomatic clinically, while the histological picture shows that pulpal damages were slight except in a few cases which showed moderate change.
The results of this investigation suggested that the application of Procal base under composite resin filling materials was effective for protection of the human primary dental pulp.
