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Related Experiment Video

Updated: May 17, 2026

The Establishment of a Murine Maxillary Orthodontic Model
04:11

The Establishment of a Murine Maxillary Orthodontic Model

Published on: October 27, 2023

Modified transpalatal arch for molar intrusion.

Sujala Durgekar1, K Nagaraj

  • 1Department of Orthodontics and Dentofacial Orthopaedics, KLE VK Institute of Dental Sciences, Belgaum, Karnataka, India.

International Journal of Orthodontics (Milwaukee, Wis.)
|October 26, 2012
PubMed
Summary

A modified transpalatal arch (TPA) appliance effectively intrudes extruded molars using elastomeric chains. This innovative orthodontic approach offers reduced chair time, enhanced patient comfort, and cost-effectiveness.

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Area of Science:

  • Orthodontics
  • Biomaterials Engineering

Background:

  • Extruded molars present a significant challenge in orthodontic treatment, often requiring complex and time-consuming correction methods.
  • Traditional intrusion techniques can be cumbersome and may lead to patient discomfort.

Observation:

  • A modified transpalatal arch (TPA) appliance was designed using 0.036-inch stainless steel wire with palatal and buccal arms.
  • Activation involves stretching an elastomeric chain from the palatal to the buccal arm, applying a force of 50 grams across the occlusal surface of the extruded molar.

Findings:

  • The modified TPA successfully intruded the extruded second molar.
  • The appliance design facilitates efficient force application for molar intrusion.

Implications:

  • This modified TPA offers a potentially simpler and more comfortable solution for molar intrusion in orthodontic patients.
  • The technique's cost-effectiveness and reduced chair time present significant advantages for both clinicians and patients.

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