A Cone-beam Computed Tomographic Study of Apical Surgery–related Morphological Characteristics of the Distolingual Root in 3-rooted Mandibular First Molars in a Chinese Population

Apical surgery on the separate distolingual (DL) root of a 3-rooted mandibular first molar is thought to be difficult because DL roots are always severely curved, small, and shorter than distobuccal (DB) roots, and they are located far from the buccal cortical bone. The purpose of this study was to use cone-beam computed tomographic images to investigate the apical surgery–related morphological characteristics of DL roots in a Chinese population.

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