Control of incisor root torque with direct 3D‑printed clear aligners
Official title: Efficacy of Root Torque Control in Adult Non-extraction Spacing Cases Treated With Directly 3D Printed Clear Aligners: a Cone Beam Computed Tomography Study
Run by Suez Canal University · NCT07273552 · Data updated 2026-11-12
This will test whether direct 3D‑printed aligners can achieve planned root torque in adults (18–45) having non‑extraction orthodontic treatment for anterior spacing.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 18 Years to 45 Years |
| Sex | All |
| Enrollment | 14 (estimated) |
| Sponsor | Suez Canal University Academic / other |
| Locations | 3 sites (Banī Suwayf and 2 other locations) |
| Status | Recruiting |
| Started | June 1, 2025 |
| Main results expected | June 1, 2026 |
| Study ends | July 1, 2026 |
| Registry record updated | December 9, 2025 |
| Trial ID | NCT07273552 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults aged 18–45 with Angle Class I or II malocclusion, anterior spacing, planned non‑extraction treatment, normal probing depths, and no systemic conditions affecting bone metabolism.
✕Probably not a fit
Patients with active periodontal disease, significant crowding, those requiring extractions, or those on medications/with conditions altering bone metabolism are unlikely to benefit or be eligible.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
Participants will receive treatment planned from intraoral scans and will wear direct 3D‑printed aligners that are softened in warm water and changed weekly. Cone beam CT (CBCT) scans will be taken before treatment and at treatment end (within 9 months to 2 years) to measure incisor root torque, labial/palatal bone thickness, and root length. Achieved torque will be compared to planned torque to calculate efficiency (achieved/predicted × 100%) and detect any root resorption or bone changes. Fourteen cases will be enrolled across three Egyptian university centers with informed consent obtained from all participants.
Why it matters
Potential benefit: If successful, this approach could make incisor torque movements more predictable with aligners and help protect surrounding bone and root structure.
How similar studies have gone: Direct 3D‑printed aligners are relatively new and there is limited clinical evidence; laboratory and small clinical reports show promise but reliable torque control with aligners remains a known challenge.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: 1. Age: 18- 45 years old. 2. Non- extraction treatment. 3. Angle Class I or Class II dental malocclusion with generalized or localized anterior spacing. 4. Normal probing depth. Exclusion Criteria: 1. Active periodontal disease. 2. Crowding cases. 3. Systemic diseases or medications that alter bone metabolism or tooth movement.
Where it's running
-
Beni-Suef University
Banī Suwayf, Egypt Recruiting -
British University in Egypt
Cairo, Egypt Recruiting -
Suez Canal University
Ismailia, Egypt Recruiting
Study contacts
- Principal investigator: Rim M Fathalla, PhD of Orthodontics — Suez Canal University
- Study coordinator: Rim M Fathalla, PhD of Orthodontics
- Email: rim_fathalla@dent.suez.edu.eg
- Phone: 00201222726567
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.