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

Launched by ESSRAA HASSAN HUSSEIN MOHAMED · Jun 26, 2025

Keywords

ClinConnect Summary

This clinical trial is looking at two different types of clear orthodontic retainers, which are devices worn after braces or other orthodontic treatments to keep teeth in their new positions. The study compares retainers made using a direct 3D-printing method with those made by thermoforming, a process that shapes plastic over a mold. Researchers want to find out which type fits better and keeps its color longer, helping orthodontists choose the most reliable retainer for patients.

Adults who have finished their orthodontic treatment and have good oral health may be eligible to join. Participants will be randomly assigned to receive one of three types of retainers and will be monitored over time to see how well their retainer fits and how it holds up in color. People who smoke, have certain dental habits like teeth grinding, or have had problems following orthodontic treatment before will not be eligible. This study is being done at Al-Azhar University’s Dental Faculty in Assiut, and it aims to improve long-term care after orthodontic treatment.

Gender

ALL

Eligibility criteria

• Inclusion Criteria:
• • Patients who have completed their active orthodontic treatment.
• • Adults aged 18 years and above.
• • Cooperative individuals willing to participate.
• • Patients with good oral hygiene and general health.
• • No systemic diseases that may affect treatment outcomes.
• Exclusion Criteria:
• • Smokers.
• • Patients with a history of poor compliance with previous orthodontic treatment.
• • Patients with parafunctional oral habits (e.g., bruxism).
• • Patients undergoing retreatment due to relapse.