Related Experiment Video
Updated: Sep 25, 2026

Midface Hypoplasia and Cranial Base Morphology in Syndromic Craniosynostosis: A Comparative Analysis Study Using a Predictive Regression Model
Published on: November 4, 2025
Absence of facial type differences among preschool children with sleep-related breathing disorder
Shigeto Kawashima1, Timo Peltomäki, Hideaki Sakata
1Department of Oral and Maxillofacial Surgery, Institute of Dentistry, University of Turku, Turku, Finland. BZP05305@nifty.ne.jp
Insights
Sleep-related breathing disorder (SBD) in children may link to hyperdivergent or neutral facial types, but not specific hyoid bone positions. Pharyngeal width is a key indicator of SBD.
Area of Science:
- Pediatric Sleep Medicine
- Craniofacial Morphology
- Respiratory Physiology
Background:
- Sleep-related breathing disorder (SBD) is a growing concern in pediatric populations.
- Facial morphology and hyoid bone position are hypothesized to influence SBD development.
- Understanding these relationships can aid in early diagnosis and intervention.
Purpose of the Study:
- To investigate the association between specific facial types and hyoid bone position in preschool children with SBD.
- To identify potential craniofacial indicators for SBD in young children.
Main Methods:
- A cohort of 69 preschool children was analyzed.
- Participants were categorized into four groups based on facial type (hyperdivergent vs. neutral) and SBD status (SBD vs. non-SBD).
- Mandibular line/Frankfurt horizontal angle and apnea index were key classification parameters.
Main Results:
- SBD was associated with both hyperdivergent and neutral facial types.
- No specific hyoid bone position was found to be related to SBD or facial type.
- Short nasal floor length, long soft palate, and short upper pharyngeal width were identified as potential indicators of SBD.
Conclusions:
- Facial type alone does not reliably distinguish between children with and without SBD.
- Pharyngeal dimensions, particularly upper pharyngeal width, appear to be significant indicators of SBD in preschool children.
- Further research into craniofacial and pharyngeal factors is warranted for SBD diagnosis.
Abstract:
The aim of this study was to find out whether there are specific facial types and a specific hyoid bone position in preschool children with sleep-related breathing disorder (SBD). A total of 69 children were divided into 4 groups based on the mandibular line/Frankfurt horizontal angle and apnea index. There were 19 children with hyperdivergent facial type and SBD and 19 children with neutral facial type and SBD, all of them with documented 0 < AI < 5. Ten children had hyperdivergent facial type and non-SBD, and 21 children neutral facial type and non-SBD. The present findings show that SBD may be associated with both hyperdivergent and neutral facial type. Furthermore, we could not find any specific hyoid bone position related to SBD, non-SBD, or to facial type. In conclusion, it is important to note that while evaluation based on facial type (mandibular shape or position) does not necessarily distinguish between children with SBD and children without SBD (non-SBD), important differences are found in the pharynx. Short nasal floor length, long soft palate, and particularly short upper pharyngeal width can be considered indicators of SBD.
More Related Videos
Related Concept Videos
Sleep Apnea
The condition is more prevalent among...
REM Sleep Behavior Disorder
RBD is significantly associated with...
Breathing
Assessment of Airway, Skin Color, and Use of Accessory Muscles
Introduction
The initial evaluation of a patient's respiratory system...
Respiratory System Abnormal Finding I: Inspection and Percussion
Inspection Findings
During an inspection, several findings may suggest the presence of respiratory distress or disease. Pursed-lip breathing, where exhalation is slowed by...
Other Pulmonary Disorders

