| The new analysis, published in the September issue of the Journal of Endodontics, focused on patients who had to be hospitalized because of an infection of the tip of the tooth's root, called a periapical abscess. |
| Root canal irrigation carries a risk of extrusion of irrigant into the periapical tissues. |
| Microorganisms and their products play a fundamental role in the pathogenesis of the pulp and periapical infections. |
| Teeth number 17 and 16 were restorable, but 26 and 27 were grossly carious with associated buccal swelling and the diagnosis was periapical periodontitis. |
| Contact with periapical tissue may occur in the event of accidental overfilling. |
| If the root canals were properly sealed, no negative reactions of the periapical tissue were observed. |
