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A perfect crystal, in theory, has a uniform structure with the same unit cell and lattice points throughout. However, any deviation from this periodic arrangement is known as an imperfection or defect. These defects can be categorized into three types: point, line, and plane defects.Point defects occur when there is a deviation from the ideal due to missing atoms, displaced atoms, or additional atoms. These imperfections might occur due to imperfect packing during crystallization or because of...

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Craniofacial Radiographic Features in Amelogenesis Imperfecta: A Case-Control Study.

Kawtar Chadli1, Mustapha El Alloussi2, Fatima Zaoui1

  • 1Orthodontics and Dentofacial Orthopedics, Faculty of Dental Medicine, Mohammed V University de Rabat, Rabat, MAR.

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|December 12, 2025
PubMed
Summary

Individuals with amelogenesis imperfecta (AI) exhibit excessive vertical growth, leading to a high prevalence of anterior open bite (AOB). Early orthodontic monitoring is crucial for managing these craniofacial characteristics.

Keywords:
amelogenesis imperfectacephalometrycraniofacialopen biteskeletal malocclusion

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Area of Science:

  • Dentistry
  • Orthodontics
  • Genetics

Background:

  • Amelogenesis imperfecta (AI) is a group of inherited disorders affecting tooth enamel formation.
  • AI can lead to various dental and potentially craniofacial complications.
  • Understanding craniofacial morphology in AI is essential for comprehensive patient care.

Purpose of the Study:

  • To evaluate the craniofacial characteristics of individuals with AI using cephalometric analysis.
  • To compare cephalometric variables between AI patients and healthy controls.
  • To investigate potential correlations between AI subtypes and craniofacial morphology.

Main Methods:

  • Cephalometric data analysis of 19 AI patients and 40 healthy controls.
  • Measurement of 23 cephalometric variables.
  • Statistical comparison using Student's t-test (p < 0.05).

Main Results:

  • A significant prevalence of anterior open bite (AOB) (57.9%) was found in AI patients.
  • AI patients showed increased vertical facial growth, including higher mandibular plane and gonial angles.
  • A Class II skeletal pattern with a retruded mandible was observed in AI patients.

Conclusions:

  • Excessive vertical growth is a primary factor contributing to AOB in AI.
  • AI-related enamel defects may indirectly influence skeletal development.
  • Early orthodontic intervention and specialized care are recommended for AI patients.