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Changes in condylar position and morphology after mandibular reconstruction by vascularized fibular free flap with condyle preservation

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Abstract

Objects

Changes in condylar position and morphology after mandibular reconstruction are important to aesthetic and functional rehabilitation. We evaluated changes in condylar position and morphology at different stages after mandibular reconstruction using vascularized fibular free flap with condyle preservation.

Materials and methods

A total of 23 patients who underwent mandibular reconstruction with fibular flap were included in this retrospective study. CT data of all patients were recorded before surgery (T0), 7 to 14 days after surgery (T1), and at least 6 months after surgery (T2). Five parameters describing the condylar position and 4 parameters describing the morphology were measured in sagittal and coronal views of CT images. The association between clinical characteristics and changes in condylar position and morphology was analyzed. A finite element model was established to investigate the stress distribution and to predict the spatial movement tendency of the condyle after reconstruction surgery.

Results

The condylar position changed over time after mandibular reconstruction. The ipsilateral condyles moved inferiorly after surgery (T0 to T1) and continually move anteriorly, inferiorly, and laterally during long-term follow-up (T1 to T2). Contrary changes were noted in the contralateral condyles with no statistical significance. No morphological changes were detected. The relationship between clinical characteristics and changes in condylar position and morphology was not statistically significant. A consistent result was observed in the finite element analysis.

Conclusion

Condylar positions showed obvious changes over time after mandibular reconstruction with condylar preservation. Nevertheless, further studies should be conducted to evaluate the clinical function outcomes and condylar position.

Clinical relevance

These findings can form the basis for the evaluation of short-term and long-term changes in condylar position and morphology among patients who have previously undergone mandibular reconstruction by FFF with condyle preservation.

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Authors and Affiliations

  1. Department of Oral and Maxillofacial Surgery, Nanjing Stomatological Hospital, Medical School of Nanjing University, 30 Zhongyang Road, Nanjing, 210008, People’s Republic of China

    Haoliang Chen, Yawei Sun, Xin Chen, Yumei Pu & Guowen Sun

  2. School of Biological Science & Medical Engineering, Southeast University, Nanjing, China

    Yongheng Li

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  1. Haoliang Chen
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  3. Yawei Sun
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  4. Xin Chen
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  6. Guowen Sun
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Contributions

Haoliang Chen and Guowen Sun conceived the study design and contributed in manuscript revision. Yongheng Li contributed in the finite element analysis in this research. Haoliang Chen and Yawei Sun participated in data collection and statistical analysis. Xin Chen, Yumei Pu, and Guowen Sun were the main surgeons of the operation in this research. All authors reviewed the manuscript.

Corresponding author

Correspondence to Guowen Sun.

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Ethics approval and consent to participate

Ethical approval for this study was granted by the Ethics Committee of Nanjing Stomatological Hospital (2018NL-027(KS)). All procedures were executed strictly according to the tenets of the Declaration of Helsinki. Patient written consent was obtained routinely.

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The authors declare no competing interests.

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Haoliang Chen and Yongheng Li contributed equally to this article.

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Chen, H., Li, Y., Sun, Y. et al. Changes in condylar position and morphology after mandibular reconstruction by vascularized fibular free flap with condyle preservation. Clin Oral Invest 27, 6097–6109 (2023). https://doi.org/10.1007/s00784-023-05225-6

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