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CBCT study on the positional relationship between marginal points of pterygomaxillary junction and anterior nasal spine

  • Anatomic Bases of Medical, Radiological and Surgical Techniques
  • Published:
Surgical and Radiologic Anatomy Aims and scope Submit manuscript

Abstract

Purpose

This study aimed to locate the inferior end (Pti) and the superior end (Pts) of pterygomaxillary junction (PMJ) relative to anterior nasal spine (ANS) so as to provide references for pterygomaxillary separation.

Methods

The study was based on CBCT images of 109 Chinese patients. We projected Pti and Pts to the frontal plane and measured the distance as well as the positional relationship between the projection points and ANS via three-dimensional reconstruction image.

Results

On average, the ANS was 5.18 mm above the Pti and the horizontal distance between the Pti and ANS was 21.86 mm. The horizontal and vertical distances between Pts and ANS was 20.41 mm and 10.91 mm, respectively. The vertical height of PMJ was 16.09 mm. Scatter plots diagrammatic centered on ANS showed that 73% (160/218) Pti and 64% (140/218) Pts appeared in a 45° fan shape ranged from 20 to 25 mm radius in bilateral inferior and superior quadrant, respectively. There was no significant difference in the distance between both sides (P > 0.05).

Conclusion

During the pterygomaxillary disjunction, it exists a risk of injuring neurovascular bundle of the pterygopalatine fossa 16.09 mm above the lowest border of the pterygomaxillary junction. The region within a 45° fan shape ranged in 20–25 mm radius in inferior quadrant centered on ANS might be suitable for the osteotome position. The positional relationship especially between the ANS and Pti found in this study provides a reference for surgeons during pterygomaxillary disjunction.

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Data availability

All data generated or analyzed during this study are included in this published article.

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Acknowledgements

This work was supported by the Key Research and Development Program of Jiangsu Province (BE2017732) and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD, 2018-87).

Funding

This work was supported by the Key Research and Development Program of Jiangsu Province (BE2017732) and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD, 2018-87).

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Author notes

  1. Xin Chen and Jiadong Zhu contributed equally to this work.

Authors and Affiliations

  1. Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital of Nanjing Medical University, No. 136, Hanzhong Road, Nanjing, 210029, Jiangsu, China

    Xin Chen, Songsong Guo & Hongbing Jiang

  2. Department of Stomatology, Affiliated Suzhou Science and Technology Town Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China

    Jiadong Zhu & Yong Hu

  3. Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, 210029, Jiangsu, China

    Xin Chen & Hongbing Jiang

Authors
  1. Xin Chen
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  2. Jiadong Zhu
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  3. Songsong Guo
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  4. Yong Hu
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  5. Hongbing Jiang
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Contributions

XC and JZ carried out the measurements and drafted the manuscript; XC and YH collected data, analyzed and interpreted the results; XC and SG were involved in the statistical analysis; HJ managed the measurement design, reviewed the manuscript and provided funding support. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Hongbing Jiang.

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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. This study was approved by the local ethics committee (No: PJ2017-048-001) of the Affiliated Stomatological Hospital of Nanjing Medical University.

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

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Cite this article

Chen, X., Zhu, J., Guo, S. et al. CBCT study on the positional relationship between marginal points of pterygomaxillary junction and anterior nasal spine. Surg Radiol Anat 43, 219–224 (2021). https://doi.org/10.1007/s00276-020-02582-9

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  • DOI: https://doi.org/10.1007/s00276-020-02582-9

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