Reverse-sequencing chewing patterns evaluation in anterior versus posterior unilateral crossbite patients

Area of Science:

• Dentistry
• Orthodontics
• Biomechanics

Background:

• Unilateral posterior crossbite is linked to reverse-sequencing chewing patterns on the affected side.
• Chewing patterns in children with anterior crossbite require further investigation.

Purpose of the Study:

• To compare the prevalence of reverse-sequencing chewing cycles in children with anterior versus posterior unilateral crossbite.
• To analyze chewing patterns with both soft and hard boluses.

Main Methods:

• Eighty-six children (anterior crossbite, posterior crossbite, normal occlusion) were studied.
• Mandibular movements were recorded using a kinesiograph.
• Kinematic signals were analyzed with custom software.

Main Results:

• Children with anterior crossbite showed low prevalence of reverse chewing cycles, similar to controls.
• Children with posterior crossbite had a significantly higher prevalence of reverse chewing cycles on the crossbite side.
• A significant difference in reverse chewing cycles was observed between anterior and posterior crossbite groups, particularly on the posterior crossbite side.

Conclusions:

• Anterior and posterior unilateral crossbites present distinct functional characteristics.
• The location of the dental crossbite influences chewing pattern development.
• Reverse chewing cycles are more prevalent in posterior unilateral crossbite during mastication.