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Three-Dimensional Digital Superimposition of Orthodontic Bracket Position by Using a Computer-Aided Transfer Jig
Jae-Hyun Park1, Jin-Young Choi1, Song Hee Oh2
1Department of Orthodontics, Graduate School of Dentistry, Kyung Hee University, Seoul 02447, Korea.
Sensors (Basel, Switzerland)
|September 10, 2021
Summary
Indirect bracket bonding systems (IDBS) ensure precise orthodontic bracket placement. This study found IDBS accuracy is clinically acceptable, with premolars and molars showing better results than anterior teeth.
Area of Science:
- Orthodontics
- Dental Technology
- Biomedical Engineering
Background:
- Accurate bracket placement is critical for successful orthodontic treatment outcomes.
- Indirect bracket bonding systems (IDBS) utilize 3D computer-aided transfer jigs for precise bracket positioning.
- Investigating factors influencing IDBS accuracy is essential for optimizing clinical application.
Purpose of the Study:
- To evaluate the accuracy of bracket positioning using a one-body transfer jig in an indirect bracket bonding system (IDBS).
- To assess the influence of tooth type (anterior, premolar, molar) on IDBS accuracy.
- To determine the effect of resin base presence or absence on the accuracy of bracket positioning with IDBS.
Main Methods:
- 506 teeth from 20 orthodontic patients were analyzed.
- 3D digital models were created from scanned dental models.
- Virtual setup and bracket positioning were performed using specialized software.
- Transfer jigs and rapid prototyping (RP) models were 3D printed.
- Brackets were bonded to RP models with or without a resin base.
- 3D digital superimposition (best-fit method) evaluated lineal and angular accuracy.
Main Results:
- All measured bracket positions exhibited statistically significant differences compared to virtual positions, yet remained within clinically acceptable limits.
- Premolars and molars demonstrated higher accuracy in bracket positioning compared to anterior teeth.
- The presence or absence of a resin base did not show a consistent impact on the accuracy of bracket positioning.
Conclusions:
- The application of indirect bracket bonding systems (IDBS) requires consideration of inherent errors for optimal results.
- Resin base fabrication may not be a mandatory step for achieving high accuracy in IDBS procedures.
- Further research may refine IDBS protocols to enhance precision across all tooth types.
