title: Mandibular incisive canal in Han Chinese using cone beam computed tomography.
abstract: The aim of this study was to provide reference information for implantology and chin bone harvesting in people of Han Chinese ethnicity by studying the mandibular incisive canal (MIC) using cone beam computed tomography (CBCT). Fifty subjects were included in the study. CBCT scans were obtained for all subjects, and 22 also underwent panoramic radiography to evaluate the visibility of the MIC. The CBCT data of the 50 subjects were reconstructed to measure MIC diameter, length, and location within the mandible. A MIC was identified in 38.6% of panoramic radiographs, with good clarity in 13.6%, while a MIC was identified in 100% of CBCT images, with good clarity in 63.6%. The diameter of the MIC decreased from origin to end. The left and right average MIC lengths were 17.84mm and 17.73mm, respectively. The MIC was close to the buccal cortical border and lower margin of the mandible. In conclusion, the MIC is an anatomical structure in the mandible that can be identified reliably with CBCT. On insertion, implants should be inclined slightly towards the lingual aspect of the anterior mandible to protect the MIC. The chin bone harvesting depth should be limited to 4mm; the harvesting site can be adjusted to the region above or below the MIC.
authors.affiliation: Department of Stomatology, The Affiliated Children's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China.
authors.forename: N
authors.initials: N
authors.lastname: Kong
authors.affiliation: Institute of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, People's Republic of China.
authors.forename: M
authors.initials: M
authors.lastname: Hui
authors.affiliation: Department of Stomatology, The Affiliated Stomatology Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China.
authors.forename: F
authors.initials: F
authors.lastname: Miao
authors.affiliation: Institute of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, People's Republic of China.
authors.forename: H
authors.initials: H
authors.lastname: Yuan
authors.affiliation: Institute of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, People's Republic of China.
authors.forename: Y
authors.initials: Y
authors.lastname: Du
authors.affiliation: Institute of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, People's Republic of China. Electronic address: njcn@njmu.edu.cn.
authors.forename: N
authors.initials: N
authors.lastname: Chen
mesh_terms: D000328:Adult; D002681:China / Q000208:ethnology; D054893:Cone-Beam Computed Tomography; D003757:Dental Implantation; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible / Q000033:anatomy & histology* / Q000000981:diagnostic imaging* / Q000601:surgery; D011862:Radiography, Panoramic; D012189:Retrospective Studies; D020858:Tissue and Organ Harvesting / Q000379:methods
keywords: anterior mandible; bone graft; cone beam computed tomography; dental implant; mandibular incisive canal