Biological Reaction of Direct 3d Printed Retainers

The aim of this study will be to evaluate the biological reaction of direct three dimensional printed retainers. Primary objective is to evaluate bacterial growth and color stability between different thicknesses of 3d printed material used as a retainer . Secondary objective is to determine the optimal thickness for use in clear aligner fabrication based on biological performance.

NCT Number	NCT07098325
Lead Sponsor	Al-Azhar University
Conditions	Orthodontic Retainers
Enrollment	26 participants
Start Date	2025-10-01
Primary Completion	2027-04-01 (estimated)
Study Completion	2027-06-01 (estimated)
Updated on ClinicalTrials.gov	2025-08-01