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[Friction: self-ligating brackets].

Guilhem Thermac¹, Laurent Morgon, Julien Godeneche

¹Faculté de Chirurgie Dentaire de Lyon, 6-8 place Depéret, 69007 Lyon, France. g.thermac@free.fr

L' Orthodontie Francaise

|December 9, 2008

Summary

Self-ligating brackets significantly reduce friction between the wire and bracket, enhancing orthodontic treatment speed and comfort. This study confirms reduced friction across various self-ligating bracket types and tested wires.

Area of Science:

Orthodontics and Dental Materials

Background:

Self-ligating brackets are marketed for reduced friction, potentially improving orthodontic treatment efficiency and patient comfort.
Friction between orthodontic wires and brackets is a critical factor influencing treatment duration and patient experience.

Purpose of the Study:

To compare the frictional forces generated by four types of self-ligating brackets against a standard bracket with elastomeric ligature.
To evaluate friction across different wire materials and dimensions used in orthodontic treatment.

Main Methods:

Frictional forces were measured using a traction bench test.
Four self-ligating bracket systems (In-Ovation R, Damon 3, Smart Clip, Quick) were tested.
Three wire types were used: steel .019"x.025", TMA .019"x.025", and NEO sentalloy F300 .020"x.020".

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Main Results:

All tested self-ligating brackets demonstrated a reduction in friction compared to the standard bracket with elastomeric ligature.
This friction reduction was consistent across all evaluated wire materials and dimensions.

Conclusions:

Self-ligating brackets offer a demonstrable advantage in reducing frictional forces in orthodontics.
The findings support the manufacturers' claims regarding friction reduction, potentially leading to faster and more comfortable orthodontic treatments.