Open-mouth posture and maxillary arch width in young children: a three-year evaluation

Area of Science:

• Pediatric Dentistry
• Orthodontics
• Craniofacial Development

Background:

• Open-mouth posture is common in children and may affect facial development.
• Understanding the longitudinal changes in mouth posture and maxillary arch width is crucial for early intervention.
• Previous research has not fully elucidated the relationship between mouth posture and maxillary growth patterns over time in diverse populations.

Purpose of the Study:

• To investigate the longitudinal changes in open-mouth posture and maxillary arch width in a biracial sample of children over three years.
• To examine racial and gender differences in these developmental patterns.
• To determine if open-mouth posture is associated with altered maxillary growth compared to closed-mouth posture.

Main Methods:

• A large, biracial cohort of children was assessed annually for three years.
• Measurements included open-mouth posture and maxillary arch width.
• Statistical analyses were performed to identify trends, differences, and correlations.

Main Results:

• Open-mouth posture significantly decreased over the three-year study period.
• Maxillary arch width significantly increased over time, with notable racial and gender variations.
• Children with persistent open-mouth posture exhibited significantly slower maxillary growth compared to those with anterior lip seal.

Conclusions:

• While open-mouth posture tends to decrease with age, its persistence can negatively impact maxillary development.
• Early identification and management of open-mouth posture are important for optimizing craniofacial growth in children.
• Findings highlight the need for considering mouth posture in orthodontic assessments and treatment planning.