Rare Creatures written by: Randall J. Iwasiuk, DDS
Three canal maxillary second premolars are quite uncommon . They occur in 0.66-1.0% (1) of maxillary second premolars, depending on whom you believe. As you can see they can be tricky to discern in pre-operative radiographs. As always good radiographs are a prerequisite to anticipating factors that may complicate your cases. These anatomical rarities occur infrequently so you won’t get many chances to bag some real trophies, so when you do be ready for them.
1. Vertucci, FJ. Root Canal Anatomy of the Human Permanent Teeth.
Oral Surg. 1984; 58: 589-599.