Upper Molar Canals?

How many canals can an upper molar have? Can a DDS or RDA answer please. Thank you.

Upper Molar Canals?
I'm a dentist.





I've read in a couple of journals that maxillary first molars have four canals almost 100% of the time.





I have my doubts about that statistic, as I find a fourth canal maybe 50% of the time in my cases. Granted, I do not use an endodontic microscope, but even if I did I doubt I'd approach even 75%.





Nonetheless, most of the time the 4th canal merges with the maxillary mesial-buccal canal, hence good obturation of the MB canal effectively seals-off the 4th canal.





Maxillary second molars have fourth canals less often.
Reply:Upper first molars have about 90% of the time 4 canals. Two near the front cheekside, one at the back cheekside and one towards the roof of the mouth. Second molars most often have 3 canals. However, human anatomy can be highly varied. I have seen second molars with 2 canals and first molars with 6.
Reply:usually 3 canals.one fer each root.but sometimes it can have an extra canal

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