Interforaminal regions of 287 Han adults evaluated by cone-beam computed tomography

Abstract

Abstract: PURPOSE: The mandibular anatomical structures including mental foramen, accessory mental foramina, anterior loop were measured and analyzed by cone-beam CT (cone-beam computed tomography, CBCT) , in order to provide some information during surgical procedures in interforaminal regions. METHODS: Two hundred and eighty-seven Chinese Han patients who visited Stomatological Department of Xiangya Hospital were included in this study. Patients were scanned by cone-beam computed tomography, and the information of interforaminal region was collected from the images. SPSS17.0 software package was used for statistical analysis. RESULTS: The mental foramen was usually apical to the second premolar or between the premolars（60.80% and 30.14%, respectively). The accessory mental foramina was observed in 4.88% of the mandibles, most of which were located under the second premolar, superiorly and distally to the mental foramen. The anterior loop was identified in 89.20% of cases with the mean length being (1.99±1.39) mm. The distance from the apex of the second mandibular premolar to the anterior loop or the inferior alveolar nerve was (5.21±2.50) mm. CONCLUSIONS: Accessory mental foramina is present in some mandibles. The anterior loop is highly prevalent in Chinese Han people, and its length is highly variable.

Key words: Cone-beam computed tomography, Inferior alveolar nerve, Mental foramen, Accessory mental foramina, Anterior loop

CLC Number:

R782.1

ZENG Ting-wen, GAO Qing-ping, GAO Xiao-meng, YU Hui-min, WU Yi-wei. Interforaminal regions of 287 Han adults evaluated by cone-beam computed tomography[J]. Shanghai Journal of Stomatology, 2016, 25(6): 715-719.

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