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Comparison of Dimensional Accuracy and Color Stability Between Direct 3D-printed and Thermoformed Retainers
Sponsor: Essraa hassan Hussein Mohamed
Summary
This study aims to compare two types of orthodontic retainers used after active treatment to maintain teeth position. The retainers are fabricated using either direct 3D-printing or thermoforming methods. The study will evaluate which method provides better dimensional accuracy (fit) and color stability over time. Adult patients who have completed their orthodontic treatment will be randomly assigned to one of three groups, each receiving a different type of retainer. The research is conducted at the Faculty of Dental Medicine, Al-Azhar University - Assiut Branch. The goal is to help orthodontists select the most reliable and durable type of retainer for long-term use.
Key Details
Gender
All
Age Range
18 Years - Any
Study Type
INTERVENTIONAL
Enrollment
30
Start Date
2025-07
Completion Date
2028-12
Last Updated
2025-07-11
Healthy Volunteers
Yes
Interventions
Direct 3D-Printed Retainer
Orthodontic retainers fabricated using direct 3D printing technology from digital STL models. The retainers are printed with biocompatible clear resin using an additive manufacturing process.
Single-Layer Thermoformed Retainer
Clear orthodontic retainers fabricated by thermoforming a single-layer thermoplastic sheet over a 3D printed dental model using a vacuum forming machine.
Multi-Layer Thermoformed Retainer
Orthodontic retainers fabricated using a multi-layer thermoforming technique combining different thermoplastic materials to enhance durability and fit accuracy.
Locations (1)
Faculty of Dental Medicine, Al-Azhar University - Assiut Branch
Asyut, Assuit, Egypt