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Investigation of orthognathic surgery indicators—combination with index of orthognathic functional treatment needs (IOFTN) and maxillofacial morphometric analysis

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Abstract

Purpose

The aim of this retrospective study was to determine orthognathic surgery indicators for Japanese patients with jaw deformities using both Index of Orthognathic Functional Treatment Needs (IOFTN) and maxillofacial morphometric analysis.

Subjects and methods

The subjects were 89 patients treated with orthognathic surgery and 92 patients treated with orthodontic treatment alone, and were classified as class I, II, or III according to the ANB angle. Based on the results for IOFTN and the results of cephalometric analysis, the indication criteria for orthognathic surgery were examined.

Results

In IOFTN analysis, none of patients in the orthognathic surgery group were classified as category 1 or 2, while 48% of the patients in the orthodontic treatment group were classified as category 4 or 5. The results of the cephalometric analysis of patients in classified categories 4 and 5 showed that the orthognathic surgery group had significantly greater lateral mandibular deviation in Class I cases, significantly more severe degree of mandibular retrusion in Class II cases, and significantly more severe degree of mandibular prognathism in Class III cases. The results of the logistic regression analysis showed that IOFTN was a common variable as an indication criterion for orthognathic surgery, and several different variables were also selected from the cephalometric measurements in each group.

Conclusion

IOFTN is a highly sensitive and useful indicator as a criterion for orthognathic surgery. However, in the choice of treatment strategy, maxillofacial morphometric analyses and the patient's desired goal are important.

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Funding

The authors declare that this research did not receive any specific funds, grants, or other support during the preparing of this manuscript.

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Authors and Affiliations

  1. Division of Reconstructive Surgery for Oral and Maxillofacial Region, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan

    Zhuoyang Zheng, Daichi Hasebe, Daisuke Suda, Naoaki Saito, Daisuke Saito & Tadaharu Kobayashi

  2. Division of Orthodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan

    Jun Nihara & Isao Saito

  3. Division of Oral Science for Health Promotion, Faculty of Dentistry & Graduate School of Medical and Dental Science, Niigata University, Niigata, Japan

    Kaname Nohno

Authors
  1. Zhuoyang Zheng
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  2. Daichi Hasebe
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  3. Daisuke Suda
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  4. Naoaki Saito
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  5. Daisuke Saito
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  9. Tadaharu Kobayashi
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Contributions

The authors declare that they have contributed significantly to design and conception of this study. Preparing the lateral and frontal cephalograms, analyzing and interpreting the data, and writing the first draft of the manuscript were performed by Zhuoyang Zheng. Daichi Hasebe, Jun Nihara, Kaname Nohno, Isao Saito contributed to analyzing and interpreting the data. Analyzing and interpreting the data, writing the paper manuscript were contributed by Tadaharu Kobayashi. All authors reviewed and commented the previous manuscript and agreed with the content of the final manuscript.

Corresponding author

Correspondence to Daichi Hasebe.

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Competing interests

The authors declare no competing interests.

Ethical approval

The study protocol was approved by the Ethics Committee of Niigata University (authorization number: 2020–0373). The study was conducted in accordance with the 1964 Declaration of Helsinki and its later amendments. All study participants were provided the opportunity to opt out.

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Zheng, Z., Hasebe, D., Suda, D. et al. Investigation of orthognathic surgery indicators—combination with index of orthognathic functional treatment needs (IOFTN) and maxillofacial morphometric analysis. Oral Maxillofac Surg (2024). https://doi.org/10.1007/s10006-024-01243-0

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