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Published on: May 6, 2014
Craniocervical posture and hyoid bone position in children with mild and moderate asthma and mouth breathing
Thaís Cristina Chaves1, Tatiana Simões de Andrade e Silva, Solange Aparecida Caldeira Monteiro
1Traumatology and Rehabilitation Program, Department of Biomechanics, Medicine and Rehabilitation of the Locomotor Apparatus, Ribeirão Preto School of Medicine, University of São Paulo, Brazil. thaiscchaves@hotmail.com
Insights
Asthma children exhibit altered craniocervical posture and hyoid bone positioning compared to healthy children. Increased asthma severity correlates with greater upper cervical spine extension.
Area of Science:
- Orthodontics and Dentofacial Orthopedics
- Pediatric Pulmonology
- Radiology
Background:
- Mouth breathing is common in children with asthma.
- Craniocervical posture and hyoid bone position may be affected in these children.
Purpose of the Study:
- To compare craniocervical posture and hyoid bone positioning in children with asthma who are mouth breathers versus non-asthma controls.
- To investigate the relationship between asthma severity and cervical spine posture.
Main Methods:
- Radiographic analysis of 56 children (28 with asthma, 28 controls) using lateral teleradiography and cervical spine radiography.
- Measurement of variables including Craniovertebral Angle (CVA) and hyoid triangle.
- Statistical analysis using independent t-test, chi-square test, and ICC for reliability.
Main Results:
- Asthma children had a significantly smaller Craniovertebral Angle (CVA) compared to controls.
- A higher frequency of absent or inverted hyoid triangle was observed in children with asthma.
- Moderate asthma severity was associated with greater superior cervical spine inclination than mild asthma.
Conclusions:
- Children with asthma display altered head extension and hyoid bone position compared to non-asthma children.
- The severity of asthma is positively correlated with the degree of upper cervical spine extension.
Introduction:
The objective of the present study was to assess the craniocervical posture and the positioning of the hyoid bone in children with asthma who are mouth breathers compared to non-asthma controls.
Methods:
The study was conducted on 56 children, 28 of them with mild (n=15) and moderate (n=13) asthma (14 girls aged 10.79+/-1.31 years and 14 boys aged 9.79+/-1.12 years), matched for sex, height, weight and age with 28 non-asthma children who are not mouth breathers. The sample size was calculated considering a confidence interval of 95% and a prevalence of 4% of asthma in Latin America. Eighteen variables were analyzed in two radiographs (latero-lateral teleradiography and lateral cervical spine radiography), both obtained with the head in a natural position. The independent t-test was used to compare means values and the chi-square test to compare percentage values (p<0.05). Intraclass correlation coefficient (ICC) was used to verify reliability.
Results:
The Craniovertebral Angle (CVA) was found to be significantly smaller in asthma than in control children (106.38+/-7.66 vs. 111.21+/-7.40, p=0.02) and the frequency of asthma children with an absent or inverted hyoid triangle was found to be significantly higher compared to non-asthma children (36% vs. 7%, p=0.0001). The values of the inclination angles of the superior cervical spine in relation to the horizontal plane were significantly higher in moderate than in mild asthma children (CVT/Hor: 85.10+/-7.25 vs. 90.92+/-6.69, p=0.04 and C1/Hor: 80.93+/-5.56 vs. 85.00+/-4.20, p=0.04).
Conclusions:
These findings revealed that asthma children presented higher head extension and a higher frequency of changes in hyoid bone position compared to non-asthma children and that greater the asthma severity greater the extension of the upper cervical spine.
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