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Precision brackets for upper lateral incisors in Bioprogressive therapy.
Alfredo V P Araujo1, Alan B Guedes1, Eriko F A Cunha1
1Orthodontics Department, Universidade Cidade de São Paulo (UNICID), São Paulo, Brazil.
Microscopy Research and Technique
|October 7, 2019
Summary
Orthodontic bracket slot accuracy is crucial for effective tooth movement. While most brands meet standards, some show variations in height, torque, and parallelism, impacting Bioprogressive Ricketts therapy.
Area of Science:
- Orthodontics
- Biomaterials Science
- Dental Mechanics
Background:
- Orthodontic brackets transmit forces to teeth via their slots.
- Inaccurate slot dimensions can compromise biomechanics and tooth movement.
- Bioprogressive Ricketts therapy relies on precise bracket-archwire interaction.
Purpose of the Study:
- To compare the dimensional accuracy of upper right lateral incisor metal bracket slots.
- To evaluate slot height, torque, and internal wall parallelism.
- To assess compliance with Ricketts prescription and ISO standards across five brands.
Main Methods:
- Utilized scanning electron microscopy for slot profile imaging.
- Measured dimensions using AutoCAD 2017 software.
- Compared measurements against Ricketts prescription and ISO 27020 tolerance parameters.
Main Results:
- Most evaluated bracket characteristics adhered to standard parameters within tolerance.
- 3M Abzil brackets showed torque variation.
- Morelli brackets exhibited variations in height and slot wall parallelism.
Conclusions:
- Metal brackets for Bioprogressive Ricketts therapy generally demonstrate satisfactory dimensional accuracy.
- Specific inaccuracies in torque, height, and parallelism were noted in certain brands (3M Abzil, Morelli).
- These dimensional variations may necessitate careful attention during the detailing phase of treatment.
