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Surgical and Radiologic Anatomy

Erschienen in:

01.08.2015 | Original Article

Anatomic study on mental canal and incisive nerve canal in interforaminal region in Chinese population

verfasst von: Yun Xu, Ning Suo, Xiufen Tian, Fei Li, Guangxin Zhong, Xiaoran Liu, Yongxing Bao, Tao Song, Hua Tian

Erschienen in: Surgical and Radiologic Anatomy | Ausgabe 6/2015

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Abstract

Purpose

This study was aimed to detect the positions of mental canal and incisive nerve canal as well as the prolongation of mandibular canal in interforaminal region in Chinese population to supply the reference data of the surgical safe zone in chin for clinicians.

Materials and methods

A total of 80 formalin-fixed semi-mandibles of Chinese adult cadavers were dissected, the positions and courses of mental canal and incisive nerve canal as well as the prolongation of mandibular canal in interforaminal region were measured.

Results

The mental foramina were present in all cases (100 %), and most of them were located below 2nd premolar (58.75 %). Accessory mental foramina were observed in 5 %. The anterior end of mandibular canal, extending along the course of 7.37 ± 1.10 mm above the lower border of mandible to interforaminal region about 3.54 ± 0.70 mm medial to the mental foramen, most often ended below between the two premolars (73.75 %), where it continued as the incisive nerve canal (100 %) and the mental canal (96.25 %). Mental canal, with the wall formed by compact bone, being 2.60 ± 0.60 mm in diameter and 4.01 ± 1.20 mm in length, opened into mental foramen. Incisive nerve canal, with the wall formed by thin compact bone and/or partly or completely by spongy bone, being 1.76 ± 0.27 mm in diameter and 24.87 ± 2.23 mm in length, extended to the incisor region along the course of 9.53 ± 1.43 mm above the lower border of mandible, and most often ended below the lateral incisor (70.00 %).

Conclusion

This research recommended for chin operations in Chinese population: the surgical safe zone could be set in the region about over 4 mm anterior to the mental foramen, and over 12 mm above inferior border of mandible for anterior alveolar surgery, or within 9 mm above inferior border of mandible for genioplasty.

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Titel: Anatomic study on mental canal and incisive nerve canal in interforaminal region in Chinese population
verfasst von: Yun Xu
Ning Suo
Xiufen Tian
Fei Li
Guangxin Zhong
Xiaoran Liu
Yongxing Bao
Tao Song
Hua Tian
Publikationsdatum: 01.08.2015
Verlag: Springer Paris
Erschienen in: Surgical and Radiologic Anatomy / Ausgabe 6/2015
Print ISSN: 0930-1038
Elektronische ISSN: 1279-8517
DOI: https://doi.org/10.1007/s00276-014-1402-7

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Anatomic study on mental canal and incisive nerve canal in interforaminal region in Chinese population