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Comparison of Dimensional Accuracy and Color Stability Between Direct 3D-printed and Thermoformed Retainers

NCT07053410 · Status: NOT_YET_RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 30

Last updated 2025-07-11

No results posted yet for this study

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.

Conditions

  • Orthodontic Retention Appliance
  • Clear Orthodontic Retainers

Interventions

DEVICE

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.

DEVICE

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.

DEVICE

Multi-Layer Thermoformed Retainer

Orthodontic retainers fabricated using a multi-layer thermoforming technique combining different thermoplastic materials to enhance durability and fit accuracy.

Sponsors & Collaborators

  • Essraa hassan Hussein Mohamed

    lead OTHER

Principal Investigators

  • Mostafa M. Dawaba, PhD · Faculty of Dental Medicine, Al-Azhar University - Assiut Branch

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2025-07-31
Primary Completion
2027-12-31
Completion
2028-12-31

Countries

  • Egypt

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07053410 on ClinicalTrials.gov