锥形束CT(cone-beam computed tomography,CBCT)应用于口腔部位的三维成像,是近年来口腔医生关注的热点,常被应用于口腔种植学.下颌后区是种植的重要部位,同时也是双神经管变异的常发地带.本文综述了下颌双神经管的分类,运用CBCT研究的新进展,对其存在的临床意义进行总结.%Cone-beam CT(cone-beam computed tomography, CBCT) applied to the oral part of three-dimensional imag-ing, is the focus of attention in recent years and used in dental implantology frequently. Mandibular posterior region is an important part of implanting, but also a risk place about anatomic variation of the mandible. The classification of bi-fid mandibular canal, the use of new progress CBCT study, the clinical significance of their presence, summarized were in this passage.
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