Clear twin block for growing patients with class II malocclusion
Official title: Dento-skeletal Effects of Clear Twin Block Treatment at Specific Period in Growing Patients: A CBCT Based Controlled Clinical Trial
Run by University of Baghdad · NCT07924982 · Data updated 2026-11-12
This study tests whether wearing a clear twin block appliance for 3 months helps correct dento-skeletal differences in kids aged 9–12 with Class II Division 1 malocclusion.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 9 Years to 12 Years |
| Sex | All |
| Enrollment | 40 (estimated) |
| Sponsor | University of Baghdad Academic / other |
| Locations | 1 site (Baghdad, Baghdad Governorate) |
| Status | Recruiting |
| Started | October 20, 2026 |
| Main results expected | January 25, 2027 |
| Study ends | January 30, 2027 |
| Registry record updated | November 9, 2026 |
| Trial ID | NCT07924982 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal participants are 9–12 years old with Class II Division 1 malocclusion and a Class 2 skeletal pattern who consent to participate.
✕Probably not a fit
Patients who are older teens, do not have the target malocclusion pattern, or refuse participation may not benefit.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
Forty children with Class II Division 1 malocclusion and a Class 2 skeletal pattern will wear a digital twin block appliance for three months (16 hours per day). The study will collect dental and skeletal records before and after treatment, including photographs, cephalometric radiographs, digital dental models, and optional CBCT data. Primary outcomes include changes in overbite, overjet, and inter-canine and inter-molar widths. The trial is conducted under the University of Baghdad in Baghdad, with parental informed consent obtained for all participants.
Why it matters
Potential benefit: If successful, the appliance could improve bite alignment and facial balance in growing patients.
How similar studies have gone: Prior evidence in orthodontics suggests clear aligner-like approaches can influence dento-skeletal changes in growing patients, but results vary by protocol and population.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * age ranged from 9 to 12 years * class Ⅱ Div1 mal-occlusion and class 2 skeletal pattern Exclusion Criteria: * Adults (passing the puberty) * Refuse to participate in the study * Uncooperative patients
Where it's running
-
Samer Salim Othman
Baghdad, Baghdad Governorate, Iraq Recruiting
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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.