Accuracy Evaluation of Indirect Bonding Techniques for Clear Aligner Attachments Using 3D-Printed Models: An In...

Area of Science:

• Orthodontics
• Dental Materials Science
• Biomedical Engineering

Background:

• Accurate placement of clear aligner attachments is vital for predictable orthodontic treatment outcomes.
• Inaccurate bonding can compromise the effectiveness of clear aligner systems.
• Comparing different attachment designs is essential for optimizing treatment predictability.

Purpose of the Study:

• To evaluate and compare the positioning reliability of horizontal versus vertical orthodontic clear aligner attachments.
• To determine which attachment orientation offers greater accuracy in the indirect bonding procedure.

Main Methods:

• Seventy horizontal and seventy vertical attachments were bonded to 10 experimental acrylic resin models.
• Attachments were digitally planned, and templates were manufactured using 3D printing and thermoforming.
• Postoperative digital images were obtained via intra-oral scanning, and cephalometric parameters were analyzed using statistical tests.

Main Results:

• Statistically significant differences (p < 0.05) were observed in the accuracy of indirect bonding between horizontal and vertical attachments.
• The accuracy of the PAPver and PMVhor cephalometric parameters did not show significant differences between the groups.

Conclusions:

• Vertical orthodontic clear aligner attachments exhibit higher accuracy than horizontal attachments when utilizing the indirect bonding technique.
• The findings suggest that vertical attachments may lead to more predictable tooth movement in clear aligner therapy.