Summary:
Purpose: to investigate the root canal morphology of maxillary second premolars in a Saudi Arabian subpopulation using microcomputed tomography (micro-CT).
N= 100 maxillary second premolars
Materials/Methods:
•The anatomy of each tooth (number of roots, canals, orifices, and apical foramina, and the presence of apical deltas and accessory canals) was analyzed from reconstructed three-dimensional images.
Most highlighted Results:
•The most common morphology was a single root (67%), followed by two roots (30%), and three roots (3%).
•Regarding the canal morphology, most teeth (65%) contained two canals, followed by 30% with one canal, and 5% with three canals.
•One orifice was observed in 55% of teeth, and two orifices were detected in 45% of teeth.
•According to the Vertucci classification, the most common canal types were IV and V (both found in 23% of teeth), followed by type I (17%), type III (9%), type II (7%), and type VII (2%).
•Additional types that were inconsistent with the Vertucci classification were recorded in 19% of teeth.
Clinical significance:
The root canal morphology of maxillary second premolars in the Saudi Arabian subpopulation is complex and requires cautious evaluation prior to endodontic treatment
