Postural stability and unilateral posterior crossbite: is there a relationship?

Area of Science:

• Dentistry
• Orthodontics
• Biomechanics

Background:

• Unilateral posterior crossbite is a common dental malocclusion.
• Its potential impact on overall body posture and stability remains incompletely understood.
• Investigating this link is crucial for comprehensive patient care.

Purpose of the Study:

• To investigate the influence of unilateral posterior crossbite on whole-body postural stability.
• To determine if occlusal conditions and gender affect this relationship.
• To provide evidence-based recommendations regarding the treatment of this malocclusion for postural health.

Main Methods:

• A stabilometric platform was used to assess postural stability in 26 subjects with unilateral posterior crossbite and 52 matched controls.
• Measurements included weight distribution and body sway speed.
• Data were collected under two occlusal conditions: intercuspal position and with cotton rolls between teeth.

Main Results:

• No significant differences in weight distribution or body sway speed were found between subjects with unilateral posterior crossbite and controls.
• Occlusal conditions (intercuspal position vs. cotton rolls) and gender did not significantly influence postural stability.
• The presence or absence of a lateral mandibular slide in crossbite also showed no significant effect.

Conclusions:

• Unilateral posterior crossbite does not appear to significantly impact whole-body postural stability.
• Current evidence does not justify the orthodontic treatment of unilateral posterior crossbite solely for the prevention or management of postural disorders.
• Further research may explore other potential factors influencing posture in individuals with this malocclusion.