ĐẶC ĐIỂM HÌNH THÁI HỆ THỐNG ỐNG TỦY RĂNG HÀM LỚN THỨ NHẤT HÀM DƯỚI TRÊN PHIM CT CONE-BEAM

Abstract

Objectives: (1) Evaluating the number of roots in mandibular first molars.; (2) Determining the morphological characteristics of the root canal system of mandibular first molars based on Vertucci’s classification. Materials and Methods: A cross-sectional study was conducted on 100 patients who had CBCT as indicated by dentists in Department of Diagnostic Imaging and Functional Exploration, National Hospital of Odonto-Stomatology Hanoi using the Planmeca Promax 3D Max (Finland). The number of root canals of the first lower molars was examined by moving cross-sectional slices from the pulpal floor to the apex. Observations were made on the canal orifices, middle thirds, and apical thirds, with the root canals of each root in the mandibular first molars assessed across three anatomical planes. Results: The majority (87.5%) of mandibular first molars had two roots, while 12.5% had three roots. According to Vertucci’s classification, the most common canal configuration in the mesial root was Type IV (48.5%), while the distal root was predominantly Type I (67%). The presence of a middle mesial canal (MM) in the mesial root was observed in 1% of cases. Conclusions: Mandibular first molars most commonly have two roots and the most common canal configuration in the mesial root was Type IV (48.5%), while the distal root was predominantly Type I (67%. CBCT is an advanced imaging modality well-suited for analyzing the intricate morphology of root canal systems in human teeth.