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Accuracy of One-Piece vs. Segmented Three-Dimensional Printed Transfer Trays for Indirect Bracket Placement
Bayan Alyammahi1, Amar Hassan Khamis1, Ahmed Ghoneima1,2
1Department of Orthodontics and Paediatric Dentistry, Hamdan Bin Mohammed College of Dental Medicine (HBMCDM), Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai P.O. Box 505055, United Arab Emirates.
Both one-piece and segmented three-dimensional (3D) printed transfer trays accurately facilitate indirect bonding for moderate and severe dental crowding. The study found crowding severity did not impact bracket transfer accuracy with these 3D-printed tools.
Area of Science:
- Orthodontics
- Dental Materials Science
- Digital Dentistry
Background:
- Indirect bonding is a crucial technique in orthodontics for precise bracket placement.
- Three-dimensional (3D) printing offers potential for creating customized transfer trays.
- Evaluating the accuracy of different 3D-printed tray designs is essential for clinical application.
Purpose of the Study:
- To compare the accuracy of one-piece versus segmented 3D-printed transfer trays for indirect bonding.
- To assess the influence of moderate and severe dental crowding on tray accuracy.
Main Methods:
- Eighty digital dental models with moderate (6-7 mm) and severe (10 mm) crowding were used.
- One-piece and segmented 3D-printed transfer trays were designed and fabricated.
- Brackets were transferred using the trays, and final positions were scanned and analyzed.
Main Results:
- In moderate crowding, significant differences were found for three measurements between tray types and control (p < 0.001).
- No significant differences in accuracy were observed for any measurements in the severe crowding group.
- Overall, both tray types demonstrated comparable accuracy.
Conclusions:
- One-piece and segmented 3D-printed transfer trays are accurate for indirect bonding in moderate and severe malocclusion.
- The severity of dental crowding does not significantly affect the accuracy of bracket transfer using these 3D-printed trays.
