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Imaging study on relationship between the location of lingula and the Gonial angle in a Chinese population

  • Keke Zhao
  • Bo Zhang
  • Yunwen Hou
  • Limin Miao
  • Ruixia Wang
  • Hua YuanEmail author
Original Article
  • 28 Downloads

Abstract

Purpose

The purpose of this study was to investigate the Gonial angle in relation to the position of the lingula using computerized image analysis to guide the oral surgeons to prevent injury to the inferior alveolar nerve and peripheral blood vessels during surgery.

Methods

We measured Gonial angle sizes of bilateral rami and the distances from the lingula tip to the mandibular notch (LN), the anterior (LA) and posterior (LP) margin of the mandibular ramus, the mandibular base (LB) and the occlusive plane (h) in 407 Chinese adults with CBCT.

Results

In males, the mean distance of LN was 17.64 mm in the low Gonial angle group while 16.76 mm in the high Gonial angle group, which was significantly different between two groups (P < 0.001). The distance of LA in LGA group was obviously longer than that in HGA group (P < 0.001). The mean distance LP of men was 17.94 mm in LGA group while 16.9 mm in HGA group (P < 0.001). In females, the mean distance of LB in LGA group was 33.32 mm and 32.37 mm in HGA group (P < 0.01).

Conclusion

We discovered that the segment of the mandibular branch, between the mandibular lingula and the mandibular angle, was obviously smaller in the HGA group than that in the LGA group.

Keywords

Lingula Gonial angle Cone-beam computed tomography Mandibular ramus Mandibular plane angle 

Notes

Acknowledgements

This work was supported in part by National Natural Science Foundation of China (81672678), A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD, 2018-87), The Project of Invigorating Health Care through Science, Technology and Education (Jiangsu Provincial Medical Youth Talent QNRC2016852) and sponsored by Qing Lan Project.

Author contributions

KZ and YH carried out the experiments and drafted the manuscript; LM and BZ collected data, analyzed and interpreted the results; BZ and RW were involved in the statistical analysis; RW and HY critically reviewed the manuscript; HY managed the experimental design, reviewed the manuscript and provided funding support. All authors read and approved the final manuscript.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Informed consent

Informed consent was obtained from all individual participants included in the study.

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Copyright information

© Springer-Verlag France SAS, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Jiangsu Key Laboratory of Oral DiseasesNanjing Medical UniversityNanjingPeople’s Republic of China
  2. 2.Department of Oral and Maxillofacial Surgery, Affiliated Hospital of StomatologyNanjing Medical UniversityNanjingPeople’s Republic of China

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