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Two-dimensional lateral cephalometric evaluation of varying types of Class II subgroups on posterior airway space in postadolescent girls: a pilot study

Zweidimensionale kephalometrische Auswertung der Atemwegsweiten im Rachen von postadoleszenten Mädchen mit diversen Klasse-II-Mustern: eine Pilotstudie

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Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie Aims and scope Submit manuscript

Abstract

Aims

The purpose of this study was to compare pharyngeal airway linear measurements of untreated skeletal Class II subjects with low-, neutral- and high-angle facial patterns and a skeletal Class I control group of postadolescent girls.

Methods

We enrolled 50 postadolescent girls in this study. The Class II,1 cohort included subjects presenting ANB angles greater than 4°. Subjects were categorized as belonging to one of three different rotation models: high, neutral and low angles. ANOVA and Duncan’s tests were used to identify differences within and among groups (p<0.05).

Results

Pharyngeal airway measurements were significantly smaller (p<0.05) in the high-angle Class II group. In addition, the narrowest linear measurements of the oropharynx (ph-pph) were also smaller in the high-angle Class II group (p=0.055). Soft palate thickness (sp1-sp2) was significantly greater (p<0.05) in the low-angle Class II group.

Conclusion

That smaller airway measurements in only the high-angle Class II subjects were noted confirms an association between pharyngeal airway measurements and a vertical skeletal pattern. However, we could not ascertain that a sagittal jaw relationship had an effect on airway space.

Zusammenfassung

Studienziele

Gegenstand dieser Studie waren die Atemwegsweiten im Rachen unbehandelter postadoleszenter Patientinnen mit skeletaler Klasse-II-Anomalie bei unterschiedlichen fazialen Mustern gegenüber einer Klasse-I-Kontrollgruppe.

Methode

Die Studie umfasste 50 postadoleszente Mädchen, wobei jene in der Klasse-II/1-Kohorte einen ANB-Winkel >4° aufwiesen und je nach Winkel der Unterkieferebene einem schwach, neutral oder stark geneigten Rotationstyp zugeordnet wurden. Per Varianzanalyse und Duncan-Test wurden gruppeninterne und gruppenübergreifende Unterschiede ermittelt (p<0,05).

Resultate

Die neigungsstarke Klasse-II-Untergruppe zeigte signifikant kleinere Rachenweiten als alle anderen Gruppen (p<0,05). Auch die engste Stelle im Oropharynx (ph-pph) war in dieser Gruppe deutlich am schmalsten (p=0,055). Die Stärke des weichen Gaumens (sp1–sp2) lag in der neigungsschwachen Klasse-II-Gruppe signifikant über den Werten in allen anderen Gruppen (p<0,05).

Schlussfolgerung

Unser Befund kleinerer Atemwegsweiten in den neigungsstarken Klasse-II-Fällen gegenüber allen anderen Gruppen bestätigt, dass zwischen Rachenweiten und vertikalen Wachstumsmustern ein Zusammenhang besteht. Einen Einfluss der sagittalen Kieferrelation auf die Atemwegsweiten verzeichneten wir nicht.

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Conflict of interest

On behalf of all authors, the corresponding author states that there are no conflicts of interest.

Interessenkonflikt

Der korrespondierende Autor gibt für sich und seine Koautoren an, dass kein Interessenkonflikt besteht.

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Authors and Affiliations

  1. Department of Orthodontics, School of Dentistry, Near East University, Lefkosa, Northern Cyprus, Turkey

    U. Oz

  2. Division of Orthodontics, College of Dentistry, University of Kentucky, D406, 40536-0297, Lexington, KY, USA

    U. Oz

  3. Department of DentoMaxillofacial Radiology, School of Dentistry, Ankara University, Ankara, Turkey

    K. Orhan

  4. Department of DentoMaxillofacial Radiology, School of Dentistry, Near East University, Lefkosa, Northern Cyprus, Turke

    K. Orhan

  5. Department of Orthodontics, Ankara University, Ankara, Turkey

    M. Rubenduz

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  1. U. Oz
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Correspondence to U. Oz.

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Oz, U., Orhan, K. & Rubenduz, M. Two-dimensional lateral cephalometric evaluation of varying types of Class II subgroups on posterior airway space in postadolescent girls: a pilot study. J Orofac Orthop 74, 18–27 (2013). https://doi.org/10.1007/s00056-012-0121-0

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