3D-Printed vs Conventional Fixed Retainers After Orthodontic Treatment

Starting soon · Not applicable

Conditions studied: Orthodontic Relapse, Malocclusion

In brief

This randomized clinical trial aims to compare the clinical performance of two types of three-dimensionally printed fixed retainers (Cobalt-Chromium and Titanium Grade 5) with the conventional multistranded stainless steel fixed retainer following orthodontic treatment. Thirty-six participants will be randomly allocated into three parallel groups with a 1:1:1 allocation ratio. The primary outcome is post-treatment stability assessed by Little's Irregularity Index and lower arch dimensions. Secondary outcomes include bond failure rate and periodontal parameters over a 12-month follow-up period.

Key facts

Study ID

NCT07730476

Run by

Minia University

People needed

36

Starts

2026-08-01

Expected to finish

2027-09-01

Last updated by the study team

2026-07-31

Who can join

Age: 21 and older, up to 35. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Age range 21-35 years old after finishing orthodontic treatment.
• Presence of all maxillary and mandibular anterior teeth with normal shape and size.
• Completion of orthodontic treatment with full fixed appliances.

You may not qualify if…

• Patients with cleft lip and/or palate or any other craniofacial syndrome
• Patients with compromised oral hygiene or periodontal disease
• Patients who had orthognathic surgery
• Lingual appliance treatments
• Enamel hypoplasia, fluorosis, active caries, restorations, or fractures in the anterior teeth
• Patients who had separate arch debondings with a difference of more than 2 months in-between jaws

Full record on ClinicalTrials.gov

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