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Related Experiment Video

Updated: May 9, 2026

Finite Element Analysis Model for Assessing Expansion Patterns from Surgically Assisted Rapid Palatal Expansion
07:16

Finite Element Analysis Model for Assessing Expansion Patterns from Surgically Assisted Rapid Palatal Expansion

Published on: October 20, 2023

Magical NiTi expander.

Chandrika Girish Katti1, Girish Katti, Ravi Kallur

  • 1Department of Orthodontics & Dentofacial Orthopaedics, Al Badar Dental College & Hospital, Gulbarga, Karnataka, India. drcgkatti@gmail.com

BMJ Case Reports
|July 23, 2013
PubMed
Summary
This summary is machine-generated.

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This study highlights the successful orthodontic treatment of severe maxillary arch constriction using a nickel titanium (NiTi) slow expander. The findings demonstrate effective maxillary expansion for correcting congenital facial disfigurement.

Area of Science:

  • Dentistry
  • Orthodontics
  • Craniofacial Surgery

Background:

  • Congenital facial disfigurement often involves complex craniofacial anomalies.
  • Maxillary arch constriction is a common feature requiring presurgical correction.
  • Orthodontic interventions play a crucial role in preparing for surgical correction.

Observation:

  • A 24-year-old male presented with severe maxillary arch constriction, a V-shaped arch, anterior crowding, and a massive open bite.
  • Associated findings included a convex profile, increased interlabial gap, tongue thrust, and limited mouth opening.
  • Radiographic and model analyses confirmed the severity of the dental and skeletal discrepancies.

Findings:

  • Treatment involved maxillary arch expansion using a nickel titanium (NiTi) slow expander combined with fixed mechanotherapy.

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Last Updated: May 9, 2026

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  • The orthodontic approach successfully expanded the constricted maxillary arch.
  • The outcome of the presurgical expansion was unexpectedly successful.

    • Implications:

    • This case underscores the efficacy of non-surgical orthodontic expansion for severe maxillary constriction.
    • Careful case selection is vital for successful orthodontic treatment of constricted arches.
    • Nickel titanium (NiTi) expanders offer a viable orthodontic solution for arch expansion.