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Craniofacial pattern of Class III deciduous dentition.

H P Chang1, Z Kinoshita, T Kawamoto

  • 1Department of Orthodontics, School of Dentistry, Kaohsiung Medical College, Taiwan, Republic of China.

The Angle Orthodontist
|January 1, 1992
PubMed
Summary

Children with Class III malocclusion exhibit a longer, forward-positioned mandible and a slightly retruded maxilla. Their incisors show lingual tipping, indicating compensatory mechanisms for skeletal dysplasia in deciduous dentition.

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Area of Science:

  • Orthodontics and Dental Anthropology
  • Craniofacial Morphology
  • Pediatric Dentistry

Background:

  • Class III malocclusion is a common developmental anomaly affecting facial structure.
  • Understanding cranio-dento-facial morphology in early stages is crucial for timely intervention.
  • Deciduous dentition provides an early window into potential skeletal discrepancies.

Purpose of the Study:

  • To investigate the specific morphological characteristics of the cranio-dento-facial complex in children with deciduous dentition and Class III malocclusion.
  • To compare craniofacial structures between children with normal occlusion and those with Class III malocclusion during the deciduous stage.

Main Methods:

  • Cephalometric analysis was performed on two groups of 40 Chinese children in Taiwan.

Related Experiment Videos

  • One group presented with normal occlusion, while the other exhibited Class III malocclusion in their deciduous dentition.
  • Measurements focused on skeletal and dental components of the cranio-dento-facial complex.

    • Main Results:

    • Children with Class III malocclusion demonstrated significantly greater mandibular length.
    • The mandible was positioned more anteriorly in the Class III group.
    • A slight posterior positioning and shorter length of the maxilla were observed in the Class III group, alongside lingual tipping of both mandibular and maxillary incisors.

    Conclusions:

    • Class III malocclusion in deciduous dentition is characterized by mandibular prognathism and maxillary retrognathism.
    • Lingual inclination of incisors serves as a compensatory response to the underlying skeletal dysplasia.
    • These findings highlight the importance of early cephalometric evaluation for identifying and managing Class III malocclusion.