Pulpal Necrosis : Definition and Histology
Pulpal Necrosis : definition
Pulpal necrosis is an irreversible condition characterized by tissue destruction. It can occur locally, or within the entire coronal pulp, or in both coronal and root canal pulp. The primary etiologic factor in pulpal necrosis is bacterial infection and the subsequent inflammatory host response; the expanse of thenecrotic process is directly correlated with the magnitude of bacterial invasion.
Pulpal Necrosis : histology
- The carious process has led to coronal openings into the pulp chamber. The coronal pulp is necrotic and an abscess has formed.
- The tissue is lytically destroyed; no cell nuclei are stained.
- At the transition to the root canal pulp, one notes necrosis of the pulp tissues and in the apical direction an incipient tissue necrosis. In this region, one notes a massive accumulation of inflammatory cells. Coronally one sees a free denticle, which effectively closes the entrance to the root canal.
- Within the area of tissue destruction, one observes neutrophilic granulocytes, where enzyme release causes further tissue destruction.