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Short- and long-term changes of the pharyngeal airway after surgical mandibular advancement in Class II patients: a three-dimensional retrospective study

Purpose To evaluate the short- and long-term impact of mandibular-only advancement on pharyngeal airway space (PAS) changes by using cone-beam computed tomography (CBCT) and a new segmentation software. Furthermore, to determine whether a correlation exists between forward movement and PAS gain. Mat...

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Main Authors: Ristow, Oliver (Author) , Rückschloß, Thomas (Author) , Berger, Moritz (Author) , Kargus, Steffen (Author) , Krisam, Johannes (Author) , Seeberger, Robin (Author) , Engel, Michael (Author) , Hoffmann, Jürgen (Author) , Freudlsperger, Christian (Author)
Format: Article (Journal)
Language:English
Published: 2018
In: Journal of cranio-maxillofacial surgery
Year: 2018, Volume: 46, Issue: 1, Pages: 56-62
ISSN:1878-4119
DOI:10.1016/j.jcms.2017.10.022
Online Access:Verlag, Volltext: http://dx.doi.org/10.1016/j.jcms.2017.10.022
Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S1010518217303724
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Author Notes:Oliver Ristow, Thomas Rückschloß, Moritz Berger, Thekla Grötz, Steffen Kargus, Johannes Krisam, Robin Seeberger, Michael Engel, Jürgen Hoffmann, Christian Freudlsperger
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Summary:Purpose To evaluate the short- and long-term impact of mandibular-only advancement on pharyngeal airway space (PAS) changes by using cone-beam computed tomography (CBCT) and a new segmentation software. Furthermore, to determine whether a correlation exists between forward movement and PAS gain. Materials and methods A retrospective evaluation of a homogeneous cohort of Class II patients who had undergone mandibular-only advancement was performed. Pre- (T0), post- (T1), and 1-year post-operative (T2) CBCT scans were obtained in each case, and the changes in PAS parameters (volume and smallest cross-sectional area) were compared with new segmentation software. Mandibular advancement was measured and correlated with PAS parameters. Results A significant postoperative gain in all airway parameters compared with baseline was shown for T1 (p = 0.02), with an additional increase for T2 (p < 0.001). No significant linear association between the movement of the measurement points and any other PAS parameters could be discerned (p > 0.05). Conclusion Our findings indicate that bilateral mandibular-only advancement surgery results in a significant widening of the PAS in Class II patients. Long-term adaption of the PAS also occurs after surgery implying an additional gain of PAS over time. Sicat Air® software seems to be a sufficient and promising tool for PAS evaluation.
Item Description:Available online 6 November 2017
Gesehen am 28.06.2018
Physical Description:Online Resource
ISSN:1878-4119
DOI:10.1016/j.jcms.2017.10.022

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