Treatment for jaw misalignment using a new appliance

Treatment Skeletal Class II Malocclusion With Modified Twin-Block Appliance With Clear Plates VS Traditional Twin Block

NA · Hama University · NCT05950581

This study is testing a new jaw appliance to see if it works better than a traditional one for people with a misaligned jaw.

Quick facts

PhaseNA
Study typeInterventional
Enrollment32 (estimated)
Ages10 Years to 13 Years
SexAll
SponsorHama University (other)
Locations1 site (Hama)
Trial IDNCT05950581 on ClinicalTrials.gov

What this trial studies

This study evaluates the effectiveness of a Modified Twin-Block Appliance with Clear Plates in treating patients with skeletal Class II malocclusion, characterized by a retracted lower jaw. Participants will be divided into two groups: one receiving the new appliance and the other receiving the traditional Twin-Block Appliance. The study aims to assess changes in skeletal, dental, and soft tissue structures resulting from these interventions. The outcomes will be compared to determine the efficacy of the new treatment approach.

Who should consider this trial

Good fit: Ideal candidates are children aged 10.5 to 13 years with specific skeletal Class II malocclusion characteristics and no prior orthodontic treatment.

Not a fit: Patients with periodontal disease, neuromuscular disorders, or other types of malocclusion may not benefit from this study.

Why it matters

Potential benefit: If successful, this treatment could provide a more effective and comfortable option for correcting jaw misalignment in young patients.

How similar studies have performed: While traditional approaches have been established, the use of clear plates in this context is a novel approach that has not been extensively tested.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* \- Patients with mixed dentition at age 10.5-13 years.
* The patient has Skeletal class II malocclusion caused by mandibular retraction ANB \> 5, 8 mm \>O.J\> 5 mm, SNB\<78, angle (NSAr) ≥ ° 125 and normal placement of the upper jaw.
* The patient is willing to accept treatment with a removable device.
* No previous orthodontic treatment
* the growth model is within the normal or horizontal maxillary opening angle of 30 \>MM or angle of 400 \> Björk
* patients do not have an upper alveolar dental protrusion.

Exclusion Criteria:

* -Patients with periodontal disease.
* patients with a neuromuscular disorder.
* patients of class I or III of malocclusion.
* Patients with temporomandibular joint disorder.
* Patients with Skeletal open bite.
* Patients with poor oral and gingival health
* the presence of a unilateral or bilateral posterior crossbite.
* patients who have upper jaw stenosis and need to be prepared by expansion before functional treatment.
* any patient who does not meet one or more of the Inclusion criteria will be removed from the study.

Where this trial is running

Hama

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Malocclusion, Angle Class II

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.