Surgical and Radiologic Anatomy

, Volume 35, Issue 1, pp 11–18 | Cite as

A retrospective comparison of the location and diameter of the inferior alveolar canal at the mental foramen and length of the anterior loop between American and Taiwanese cohorts using CBCT

  • Judy Chia-Hui Chen
  • Li-Min Lin
  • James R. Geist
  • Jing-Yi Chen
  • Chung-Ho Chen
  • Yuk-Kwan Chen
Original Article



The aim was to retrospectively compare the measurements of the location and size of the inferior alveolar canal at the mental foramen and the length of the anterior loop between two cohorts of Americans and Taiwanese using cone-beam computed tomography (CBCT).


CBCT was performed with an I-CAT® Cone-Beam 3D Dental Imaging System and reconstructed into multiple-plane views to measure two populations.


There was no statistically significant difference (P = 0.2681) in the distance from the mental foramen to the inferior border of the mandible (mandibular border height) between Americans (9.84 ± 2.01 mm) and Taiwanese (10.13 ± 1.66 mm). No significant difference was found (p = 0.1161) in the inferior alveolar canal diameter between these two cohorts (2.26 ± 0.67 and 2.13 ± 0.47 mm, respectively). However, the anterior loop length of Taiwanese (7.61 ± 1.81 mm) was significantly longer than that of Americans (6.22 ± 1.68 mm) (P < 0.0001).


Our study indicated that (1) the location of mental foramen of Americans was closer to the inferior border of the mandible than Taiwanese; (2) the diameter of the inferior alveolar canal of Americans was larger than Taiwanese; (3) the anterior loop of Taiwanese was longer than Americans. These differences may be, at least partly, due to the racial influence and this information may possess potential valuable clinical relevance.


Mental foramen Anterior loop Cone-beam computed tomography 



Cone-beam computed tomography


Mandibular border height


Inferior alveolar canal diameter


Anterior loop length


Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Judy Chia-Hui Chen
    • 1
  • Li-Min Lin
    • 1
    • 2
    • 3
  • James R. Geist
    • 4
  • Jing-Yi Chen
    • 2
  • Chung-Ho Chen
    • 1
    • 5
  • Yuk-Kwan Chen
    • 1
    • 2
    • 3
  1. 1.School of Dentistry, College of Dental MedicineKaohsiung Medical UniversityKaohsiungTaiwan
  2. 2.Division of Oral Pathology and DiagnosisKaohsiung Medical University Chung-Ho Memorial HospitalKaohsiungTaiwan
  3. 3.Oral and Maxillofacial Imaging CenterKaohsiung Medical UniversityKaohsiungTaiwan
  4. 4.Department of Biomedical and Diagnostic Sciences, School of DentistryUniversity of Detroit MercyDetroitUSA
  5. 5.Division of Oral and Maxillofacial SurgeryKaohsiung Medical University Chung-Ho Memorial HospitalKaohsiungTaiwan

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