Related Experiment Video
Updated: Jul 4, 2026
Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition
Published on: February 23, 2024
Midline shift and lateral guidance angle in adults with unilateral posterior crossbite
Benito Rilo1, José Luis da Silva, María Jesús Mora
1Department of Prosthodontics, Faculty of Medicine and Odontology, Santiago de Compostela University, Santiago de Compostela, Spain. protesis@usc.es
Introduction:
Unilateral posterior crossbite is a malocclusion that, if not corrected during infancy, typically causes permanent asymmetry. Our aims in this study were to evaluate various occlusal parameters in a group of adults with uncorrected unilateral posterior crossbite and to compare findings with those obtained in a group of normal subjects.
Methods:
Midline shift at maximum intercuspation, midline shift at maximum aperture, and lateral guidance angle in the frontal plane were assessed in 25 adults (ages, 17-26 years; mean, 19.6 years) with crossbites.
Results:
Midline shift at maximum intercuspation was zero (ie, centric midline) in 36% of the crossbite subjects; the remaining subjects had a shift toward the crossbite side. Midline shift at maximum aperture had no association with crossbite side. Lateral guidance angle was lower on the crossbite side than on the noncrossbite side. No parameter studied showed significant differences with respect to the normal subjects.
Conclusions:
Adults with unilateral posterior crossbite have adaptations that compensate for the crossbite and maintain normal function.
