Related Experiment Video
Updated: Jun 19, 2026
07:42
Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
Self-ligation esthetic brackets with low frictional resistance
John C Voudouris1, Christos Schismenos, Kresimir Lackovic
1Department of Orthodontics, New York University, College of Dentistry, New York, NY, USA. jvoud@pathcom.com
The Angle Orthodontist
|October 27, 2009
Summary
Interactive self-ligating (ISL) brackets generally showed lower frictional resistance forces (FRS) compared to conventionally ligated (CL) brackets. ISL ceramic brackets exhibited the least friction, while CL ceramic brackets demonstrated the highest friction.
Area of Science:
- Orthodontics
- Biomaterials Science
- Dental Mechanics
Background:
- Frictional forces between archwires and orthodontic brackets influence treatment efficiency.
- Self-ligating (SL) brackets are designed to reduce friction compared to conventionally ligated (CL) brackets.
Purpose of the Study:
- To compare frictional resistance forces (FRS) between various archwires and both interactive self-ligating (ISL) and CL brackets.
- To evaluate the influence of bracket type (ISL vs. CL) and material on FRS.
Main Methods:
- Three ISL brackets (In-Ovation-C, In-Ovation-R, Damon 3) and three CL brackets (Mystique with Neo Clip, Clarity, Ovation) were tested.
- Archwires included 0.020'' SS, 0.019'' x 0.025'' SS, and 0.018'' x 0.018'' coated SS in a dry environment.
Main Results:
- ISL brackets generally exhibited lower FRS than CL brackets across different wire types and materials.
- Mystique with Neo Clip produced the lowest FRS among all tested brackets.
- In-Ovation-C demonstrated significantly lower FRS compared to other ISL and CL brackets.
Conclusions:
- ISL ceramic brackets offered the lowest frictional resistance among all self-ligating options.
- CL ceramic brackets generated the highest frictional resistance in this study.
Related Concept Videos
01:17Frictional Forces on Screws
Screws are characterized by a helical ridge known as a thread wrapped around a cylindrical shaft. They are commonly used as fasteners to hold objects together or to transmit power and motion in machines. One type of screw that is particularly useful for transmitting power is the square-threaded screw.
A jack with a square-threaded screw is a mechanical device used to lift heavy loads by applying a force at its handle. When the force is applied, the screw turns, raising the load. The screw can...
A jack with a square-threaded screw is a mechanical device used to lift heavy loads by applying a force at its handle. When the force is applied, the screw turns, raising the load. The screw can...
01:07Frictional Force
When a body is in motion, it encounters resistance because the body interacts with its surroundings. This resistance is known as friction, a common yet complex force whose behavior is still not completely understood. Friction opposes relative motion between systems in contact, but also allows us to move. Friction arises in part due to the roughness of surfaces in contact. For one object to move along a surface, it must rise to where the peaks of the surface can skip along the bottom of the...
01:21Characteristics of Dry Friction
Dry friction occurs when two solid surfaces slide against each other without any lubrication or fluid present. It causes resistance when pushing objects along a surface, like a gardener pushing a wheelbarrow. The force applied to move the cart causes dry friction between the wheel and the ground.
Before the wheelbarrow starts moving, the static frictional force acts tangentially to the contact surface, opposing the force that is about to induce the motion. This frictional force prevents the...
Before the wheelbarrow starts moving, the static frictional force acts tangentially to the contact surface, opposing the force that is about to induce the motion. This frictional force prevents the...
01:24Wedges
A wedge is a simple machine that serves various purposes, such as adjusting the elevation of structural or mechanical parts, providing stability for heavy objects, and splitting a body into two parts. This versatile tool can amplify an applied force, making it easier to manipulate large or heavy objects.
Consider using a wedge to lift a heavy slab. Here, the wedge functions by converting the applied force into a much larger force directed almost perpendicular to the initial force. This...
Consider using a wedge to lift a heavy slab. Here, the wedge functions by converting the applied force into a much larger force directed almost perpendicular to the initial force. This...