17 y.o female presented w/ continued pain from a pulpotomy. Case is to highlight the existence of multiple canals in molar teeth. With the aid of a surgical microscope, we are finding additional (untreated) canals in mandibular and maxillary molars. This case had 3 canals in the mesial root of #30. Routinely the addition canal in mandibular molars is located in the isthmus between the MB and ML canal. Ultrasonic unroofing of sclerotic dentin greatly aids in the finding of additional canals. With the aid of the operating scope, the finding of MB2's in maxillary molars is now more the norm and not the unusual. Unfortunately, many molars w/ RCT and a recurrent lesion ("failed" RCT) are being extracted for implants when the tooth can be easily "saved" with a retreatment and finding of the additional canal. Let us take a look at the tooth under the scope prior to condemning it!!
