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Updated: Jun 4, 2026

Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition
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Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition

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Three-dimensional evaluation of early crossbite correction: a longitudinal study.

Jasmina Primožič1, Stephen Richmond, Chung How Kau

  • 1Department of Dental and Jaw Orthopaedics, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia.

European Journal of Orthodontics
|February 12, 2011
PubMed
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Treating unilateral posterior crossbite in primary dentition improves facial symmetry and increases palatal dimensions. Early intervention is key for optimal dental and skeletal development, though some relapse may occur.

Area of Science:

  • Orthodontics
  • Pediatric Dentistry
  • Craniofacial Development

Background:

  • Unilateral posterior crossbite is a common malocclusion in the primary dentition.
  • It can lead to facial asymmetry and affect palatal development.
  • Early intervention may prevent long-term complications.

Purpose of the Study:

  • To evaluate the effects of correcting unilateral posterior crossbite in primary dentition.
  • To assess changes in facial symmetry and palatal dimensions.
  • To determine the long-term outcomes of early crossbite correction.

Main Methods:

  • Longitudinal study of 60 children (5.3 ± 0.7 years) in primary dentition.
  • 30 children with unilateral posterior crossbite (CB) and 30 without (NCB).

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  • CB group treated with acrylic plate expander; 3D laser scanning used for facial and dental cast analysis over 30 months.

    • Main Results:

    • CB children exhibited greater lower facial asymmetry and smaller palatal volume at baseline.
    • No significant differences between groups at 6, 12, 18, and 30 months post-treatment.
    • Treatment significantly improved facial symmetry and increased palatal surface area and volume (P < 0.001).
    • Relapse observed in 26.7% of treated children by 30 months.

    Conclusions:

    • Early correction of unilateral posterior crossbite in the primary dentition improves facial symmetry and palatal dimensions.
    • Treatment supports normal occlusal development and skeletal growth.
    • Monitoring for relapse is recommended after treatment.