Mancino Davide, Abdellatif Dina, Iandolo Alfredo, Bornert Fabien, Haïkel Youssef
Faculty of Dental Surgery, University of Strasbourg, Strasbourg, France.
Department of Biomaterials and Bioengineering, INSERM UMR_S, Strasbourg University, Strasbourg, France.
Restor Dent Endod. 2025 Feb;50(1):e2. doi: 10.5395/rde.2025.50.e2. Epub 2025 Jan 8.
The present case report describes the endodontic treatment of a type III B dens invaginatus (DI) in a three-rooted mandibular second molar since the invagination invades the root and extends apically. Clinical and cone-beam computed tomography examination of the mandibular second molar showed a broadened coronal morphology, DI, a third root, periapical radiolucency, and compression of a distal root canal by the invagination, which developed an atypical semilunar shape. The tooth was diagnosed with pulpal necrosis, symptomatic apical, and peri-invagination periodontitis. Consequently, three-dimensional virtual reconstruction was conducted to improve anatomical interpretation and case planning and accelerate the intraoperative phase by reducing operator stress and minimizing intraoperative variables. The present case report aims to raise awareness of the existence of DI on the mandibular second molar.
本病例报告描述了一例下颌第二磨牙III型B型牙内陷（DI）的根管治疗，因为该牙内陷侵入牙根并向根尖延伸。对该下颌第二磨牙进行的临床和锥形束计算机断层扫描检查显示，其冠部形态变宽、存在牙内陷、有第三根、根尖周透射区以及牙内陷对远中根管造成压迫，形成了非典型的半月形。该牙齿被诊断为牙髓坏死、有症状的根尖周炎和牙内陷周围牙周炎。因此，进行了三维虚拟重建，以改善解剖结构解读和病例规划，并通过减轻术者压力和减少术中变量来加速手术进程。本病例报告旨在提高对下颌第二磨牙存在牙内陷情况的认识。
