ROEN0110

_Ultrasonic tips Ultrasonic tips were used to plane the pulpal floor and increase visibility. These instruments are available from many manufacturers in a variety of sizes and shapesdesignedtoaddressspecificcaseneeds.Theori- fice of the MB2 canal was located towards the palatal orifice in an unusual presentation (Figs. 5 & 6). This stresses the importance of continuing to examine the pulpal floor with the OM throughout the procedure, as irrigants and instrumentation constantly alter the presentationofsubtlecuesandcluestoorificelocation. Once the orifice location had been determined, canal negotiation and instrumentation were com- pleted. Warm vertical compaction of gutta-percha and ZOE sealer was used in this case, demonstrating the treated canal morphology (Figs. 7 &8). The MB2 canal was addressed as a completely separate canal. A study that examined more than 1,700 teeth, whichincludedmorethan1,000firstmolars,demon- strated the presence of the MB2 canal in 93% of these teeth.1 These findings are not surprising, given the morphology of the MB root in maxillary molars. In order to better acquaint oneself with this anatomy, examine extracted teeth or consult Brown andHerbranson’sToothAtlas,arichsourceof3-Dim- agery. The final radiographs demonstrate placement ofanorificebarrier,subsequenttotemporisationand referral back to the restorative dentist. _A complex system This case report has demonstrated the complex root-canal system anatomy present in maxillary mo- lars. Use of the OM throughout a carefully executed coronal and radicular access procedure maximises the ability to disinfect and debride these teeth. Ultrasonic instrumentation allows for the judi- cious removal of dentine required to prevent iatro- genic mishaps and unnecessary weakening of the tooth. Meticulous root-canal therapy lays the foundation for successful long-term retention and restorative care for patients who present with endodontic disease._ _Reference 1.Stropko J. Canal morphology of maxillary molars: Clinical observations of canal configurations.JOE,June 1999. I 29 case report _ maxillary molars I roots1_2010 DrMarkDreyerisa1986 graduateoftheUniversityof FloridaCollegeofDentistry. Hepracticesasageneral dentistlimitedtoendodontics inOrlandoandKissimmee, Florida,andcanbecontacted atmarkdreye@gmail.com. _contact roots Fig. 4 Fig. 5 Fig. 6 Fig. 7 Fig. 8