Vertuccis classifcation
Vertucci’s classification of root canal morphology from type I to type VIII. Type I: a single main canal is present starting from the pulp chamber to the root apex. Type II: two separate canals leave the pulp chamber but join to form one canal to the apex. Type III: one canal leaves the pulp chamber and divides into two smaller canals which later merge again to exit through one canal. Type IV: two separate as well as completely distinct canals run from the pulp chamber to the root apex. Type V: there is a single canal exiting the pulp chamber which divides into two canals with separate apical foramina. Type VI: two separate canals join at the middle of the root to form one canal which extends till the apex, just short of the apex, and again divides into two. Type VII: the canal starts as a single until the middle third of the root then divides into two separate canals that rejoin after some distance and then, near the apex, divides into two again. Type VIII: the pulp chamber near the coronal portion divides into three separate canals extending till the apex