An unusual presentation of a mucocele of the upper lip has been described. Differential diagnosis, clinical presentation, histology, and treatment were discussed.
A needlestick injury can be a frightening and even potentially a life-threatening event. It needs to be treated with compassion and some urgency. The dentist-employer should act with knowledge of the current law and with the desire to do whatever is best for the affected people.
Although a plethora of research on coronal microleakage does not exist, the studies do confirm that a sound coronal seal is of paramount importance to the overall success of root canal treatment. Temporary restorations provide an adequate seal provided they are used correctly and only for a short time. The best rule of thumb is as follows: a properly cleaned, shaped, and obturated tooth should be permanently restored as soon as possible. If the clinician suspects coronal microleakage has occurred over a time period of 3 months or more, retreatment of the root canal should be performed before placement of a permanent restoration. The clinical significance of coronal recontamination over a time period of 1 to 3 months is more ambiguous; the existing conditions of each individual case will determine whether retreatment is necessary. Continued research, especially with in vivo models, is needed in this aspect of endodontics.
Implants are highly successful alternatives to conventional prostheses when patients are properly selected and sound prosthodontic principles are followed. Yet problems may still be encountered during follow-up exams. The clinician must be educated as to possible problems and adequately prepared to manage the situation.
