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Classification of the lingual foramina and their bony canals in the median region of the mandible: cone beam computed tomography observations of dry Japanese mandibles

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Abstract

Objectives

We investigated the lingual foramina and their bony canals in the median region of the mandible using cone beam computed tomography (CBCT).

Methods

Sixty-eight dry Japanese mandibles were studied. The mandibles were set parallel to the inferior mandibular plane, and CBCT images of the medial region were obtained. The lingual foramina in the medial region (MLFs) were classified as being on the midline superior to the mental spine (s-MLF), on the midline inferior to the mental spine (i-MLF), or beside the midline (a-MLF). The frequency, location, and angulation of each foramen and its canal were measured from the CBCT images.

Results

The s-MLF, i-MLF, and a-MLF occurred with frequencies of 86.8%, 83.8%, and 42.6%, respectively. The respective distances from the inferior mandibular plane were 11.4, 4.4, and 5.7 mm, while the vertical angulation of the canals was 77.5°, 114°, and 114°. A significant relationship was observed between the foramen height and canal angulation. On dissecting six cadaver mandibles, the sublingual artery was identified in s-MLFs and i-MLFs, while anastomosis of the sublingual and submental arteries was found in the a-MLFs.

Conclusions

MLFs were observed frequently, and we confirmed that arteries passed though their canals. Since s-MLFs were the most frequent, contained the artery, and were located superior to the other MLFs, clinicians should identify such foramina from preoperative images.

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Authors and Affiliations

  1. Department of Oral and Maxillofacial Radiology, School of Life Dentistry at Tokyo, Nippon Dental University, 1-9-20 Fujimi, Chiyoda-ku, Tokyo, 102-8159, Japan

    Taisuke Kawai, Rieko Asaumi & Takashi Yosue

  2. Department of Anatomy, School of Life Dentistry at Tokyo, Nippon Dental University, Tokyo, Japan

    Iwao Sato & Shunji Yoshida

Authors
  1. Taisuke Kawai
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  2. Rieko Asaumi
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  3. Iwao Sato
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  4. Shunji Yoshida
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  5. Takashi Yosue
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Correspondence to Taisuke Kawai.

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Kawai, T., Asaumi, R., Sato, I. et al. Classification of the lingual foramina and their bony canals in the median region of the mandible: cone beam computed tomography observations of dry Japanese mandibles. Oral Radiol 23, 42–48 (2007). https://doi.org/10.1007/s11282-007-0064-0

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  • DOI: https://doi.org/10.1007/s11282-007-0064-0

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