Head motion may help mouth opening in children

Area of Science:

• Dentistry
• Biomechanics
• Human Growth and Development

Background:

• Coordinated head and mandibular movement is crucial for jaw function in adults.
• The developmental trajectory of the brain and condylar growth suggests potential differences in head-jaw coordination between children and adults.
• Limited research exists on the integration of head and mandibular movements during jaw function in pediatric populations.

Purpose of the Study:

• To investigate and compare the functional integration of jaw and head movements in children with primary dentition and adult females with permanent dentition.
• To determine if head movement magnitude differs between pediatric and adult subjects during jaw function.
• To explore the role of head extension in mouth opening in children versus adults.

Main Methods:

• Comparative analysis of head and mandibular movements during jaw function.
• Inclusion of 19 children (average age 5 years 5 months) with complete primary dentition.
• Comparison with 16 adult females (average age 20 years 3 months) with permanent dentition.

Main Results:

• Adults demonstrated a significantly greater mandibular opening distance compared to children.
• Children exhibited a greater magnitude of concomitant head motion during jaw function than adults.
• Head extension was found to contribute more significantly to mouth opening magnitude in children than in adult women.

Conclusions:

• Head and mandibular movement coordination differs significantly between children and adult females.
• Children utilize greater head extension to achieve mouth opening, suggesting a developmental adaptation in head-jaw integration.
• These findings highlight the importance of studying pediatric jaw function in the context of overall craniofacial development.