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Impact of Mandibular Angle Osteotomy Using a Geometric Mathematical Design on the Aesthetic Osteotomy Line: A Retrospective Observational Study

  • Original Article
  • Maxillofacial/Craniofacial
  • Published:
Aesthetic Plastic Surgery Aims and scope Submit manuscript

Abstract

Background

Mandibular angle osteotomy (MAO) is a frequently described technique in Eastern females. The success hinges on the precise positioning of the osteotomy line. The geometric mathematical method is viable. Therefore, we explored the impact of mandibular angle osteotomy using aesthetic standards and printed digital osteotomy templates (DOTs) on the aesthetic osteotomy line.

Methods

This retrospective observational study included female patients with prominent mandibular angle (PMA) who underwent MAO at our hospital between January 2020 and March 2021. Thirty-three female patients were included, 22 in the DOTs group using new DOTs, and 11 in the traditional group using traditional free-hand techniques.

Results

Regarding the width of the excised bone, the postoperative deviation from the preoperative plan was not significant in the DOTs group (0.5 ± 0.3 mm, P > 0.05), while the deviation was significant for the traditional group (2.5 ± 1.2 mm, P<0.05). The preparation time was longer in the DOTs group than in the traditional group (82 ± 11 vs. 53±4 min, P < 0.001). The osteotomy time and the operation time were shorter in the DOTs group than in the traditional group (osteotomy: 54 ± 5 vs. 73 ± 6 min; preparation: 124 ± 10 vs. 169 ± 13 min; both P < 0.001). The Likert (4.0 ± 0.5 vs. 1.0 ± 0.6, P = 0.006) and FACE-Q scores (17.5 ± 1.7 vs. 15.6 ± 1.3, P = 0.029) were higher in the DOTs group.

Conclusions

The new method of positioning the new aesthetic osteotomy line based on geometric analysis might provide a possible osteotomy method that strongly suggests effectiveness, safety, individualization, and accuracy, with a shorter operation and higher patient satisfaction.

Level of Evidence IV

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Data Availability

The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Funding

The present study was supported by the Innovative Clinical Research Program of Shanghai Changzheng Hospital (2020YLCYJ-Y16).

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Author notes

  1. Antong Du, Neng Ding, and Jian Zhang have contributed equally to this work.

Authors and Affiliations

  1. Department of Plastic and Reconstructive Surgery, Second Affiliated Hospital of Naval Medical University (Shanghai Changzheng Hospital), Ward Building 18th Floor, 415 Fengyang Road, Huangpu, Shanghai, 200003, China

    Antong Du, Neng Ding, Jianlin Zhang, Jie Zhu & Lie Zhu

  2. Shanghai Universal Medical Imaging Diagnostic Center, Shanghai University, Shanghai, 200237, China

    Jian Zhang

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  1. Antong Du
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  4. Jianlin Zhang
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  5. Jie Zhu
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  6. Lie Zhu
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Contributions

AD, JZ, ND, and LZ carried out the studies, participated in collecting data, and drafted the manuscript. AD, JZ, and JZ performed the statistical analysis and participated in its design. AD and LZ participated in acquisition, analysis, or interpretation of data and draft the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Lie Zhu.

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Conflict of interest

The authors declare that they have no conflicts of interest to disclose.

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 Independent Ethics Committee of Shanghai Changzheng Hospital affiliated with Second Military Medical University. All patients signed the informed consent. This article does not contain any studies with animals performed by any authors.

Informed Consent

All patients signed the informed consent.

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Antong Du, Neng Ding, and Jian Zhang are co-first authors.

Supplementary Information

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Video 1. Computer-aided surgical demonstration is used to visually show the design to patients and understand the surgical plan (MP4 39030 kb)

Supplementary file2 (MP4 434568 kb)

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Du, A., Ding, N., Zhang, J. et al. Impact of Mandibular Angle Osteotomy Using a Geometric Mathematical Design on the Aesthetic Osteotomy Line: A Retrospective Observational Study. Aesth Plast Surg 47, 1945–1956 (2023). https://doi.org/10.1007/s00266-022-03117-w

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  • DOI: https://doi.org/10.1007/s00266-022-03117-w

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