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Effect of Mandibular Setback Surgery on Tongue Length and Height and Its Correlation with Upper Airway Dimensions

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Abstract

Introduction

The changes in length and height of tongue following mandibular setback (MS) surgery may affect pharyngeal airway dimensions. There is limited literature correlating tongue dimensional changes with linear and volumetric airway changes following MS with bilateral sagittal split ramus osteotomy (BSSRO) in skeletal class III patients.

Materials and Methods

Treatment records of 18 patients who underwent MS with BSSRO were evaluated for changes in tongue and linear airway dimensions, mean airway volume and area at T1 (1-week pre-surgery), T2 (6-month post-surgery) and T3 (2-year post-surgery). Amount of MS was recorded from case sheets of patients. Mean tongue length reduced, whereas mean tongue height increased at T2 compared to T1 (P value = 0.001 for both). Linear, area and volumetric airway parameters at T2 were significantly reduced (P value = 0.001). All parameters showed statistically nonsignificant increase from T2 to T3 (P value > 0.05). Correlation analysis showed that change in tongue length at T3 did not show statistically significant correlation with amount of MS, changes in linear, area and volumetric airway parameters (P value > 0.05). However, the change in tongue height at T3 showed a significant (P value < 0.05) negative correlation (r value = − 0.742) with change in posterior airway space (PAS).

Conclusions

The appraisal of tongue length and height after MS surgery should be an integral part of diagnosis and treatment planning. The retro-positioning of tongue and increase in its height after MS surgery may compromise pharyngeal airway especially PAS. Additional options such as bi-jaw surgery, debulking of tongue volume and genioplasty should be explored to minimize adverse effects post-surgically.

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Authors and Affiliations

  1. Department of Oral and Maxillofcial Surgery, Armed Forces Medical College, Pune, 411040, India

    N. K. Sahoo & S. K. Bhandari

  2. Department of Orthodontics and Dentofacial Orthopedics, Armed Forces Medical College, Pune, India

    Shiv Shankar Agarwal & Sanjeev Datana

Authors
  1. N. K. Sahoo
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  2. Shiv Shankar Agarwal
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  3. Sanjeev Datana
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  4. S. K. Bhandari
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Correspondence to N. K. Sahoo.

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The study design was approved by the Institutional Ethical Committee.

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Sahoo, N.K., Agarwal, S.S., Datana, S. et al. Effect of Mandibular Setback Surgery on Tongue Length and Height and Its Correlation with Upper Airway Dimensions. J. Maxillofac. Oral Surg. 20, 628–634 (2021). https://doi.org/10.1007/s12663-020-01372-5

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  • DOI: https://doi.org/10.1007/s12663-020-01372-5

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