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Force System with Vertical V-Bends: A 3D In Vitro Assessment of Elastic and Rigid Rectangular Archwires

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Published on: July 24, 2018

Apical force distribution due to orthodontic forces: a finite element study.

Anirudh K Mathur¹, Vikas Gupta, Anirban Sarmah

¹Department of Orthodontics, HKDET Dental College, Humnabad, Karnataka, India. dranirudhkm@yahoo.co.in

The Journal of Contemporary Dental Practice

|December 22, 2011

Summary

Orthodontic forces like intrusion, extrusion, and rotation concentrate stress on the root apex. Clinicians should use caution with these forces to avoid apical stress during treatment.

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Area of Science:

Biomechanical analysis of dental structures.
Finite element modeling in orthodontics.

Background:

Understanding stress distribution in the periodontal ligament (PDL) is crucial for orthodontic treatment planning.
The root apex is particularly sensitive to excessive forces.

Purpose of the Study:

To calculate stress distribution in the PDL under various orthodontic forces.
To determine the specific effects of different force types on the root apex.

Main Methods:

A 3D finite element model of a maxillary central incisor, PDL, and alveolar bone was created.
Five orthodontic force types (tipping, bodily movement, intrusion, extrusion, rotation) were simulated.
Initial stress and displacement within the PDL were analyzed using ANSYS software.

Main Results:

Intrusion, extrusion, and rotation generated the highest stress at the root apex.
Bodily movement and tipping forces primarily stressed the alveolar crest, not the apex.

Conclusions:

Vertical (intrusion, extrusion) and rotational forces warrant caution due to significant apical stress.
Orthodontic force selection should consider potential impact on root apex health.