Dens invaginatus is an anomaly which has numerous and complex forms. W
henever endodontic therapy involving such a tooth becomes necessary, t
he clinician must be aware of the various treatment modalities availab
le to facilitate proper care. Presented in this case report is a maxil
lary lateral incisor having the anomaly dens invaginatus in which both
surgical and nonsurgical treatment was required. The surgical phase w
as facilitated through the use of ultrasonic instrumentation.