Abstract
This histopathological study was undertaken to investigate the pulpal irritation of Panavia EX in adult dogs at the intervals of 3, 7, 14, 30, 60, 90 and 120 days after filling. The results were as follows:
1. At the 3-day and 7-day postoperative intervals many cases showed the pulpal changes, however, its degree was not severe, but moderate.
2. At the 14-day and 30-day postoperative intervals few cases showed changes and yet its degree was mild. The number of the cases with reparative dentin formation was very few.
3. At the 60-day, 90-day and 120-day postoperative intervals many cases showed no pulpal changes, the number of the cases with changes gradually decreased and its degree became mild. The number of the cases with reparative dentin formation was reparatively few and also its amount was scanty.
4. As a result of this study, it can be considered that Panavia EX was less irritative to the pulp.
