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Modified Versus Clear Twin Block for Skeletal Class II Malocclusion
Sponsor: University of Aleppo
Summary
This study aims to evaluate the effectiveness of a modified Twin Block appliance compared to a conventional clear Twin Block appliance in the treatment of skeletal Class II malocclusion caused by mandibular retrusion in growing patients. This is a two-arm randomized controlled clinical trial including patients aged 10-13 years diagnosed with skeletal Class II malocclusion. Participants will be randomly allocated into two equal groups. Skeletal, dental, and soft tissue changes will be assessed using lateral cephalometric analysis and cone-beam computed tomography (CBCT). Additionally, temporomandibular joint (TMJ) health, pain perception, and functional tolerance will be evaluated using standardized clinical indices and patient-reported outcome measures. The study aims to compare the modified appliance with the conventional design in terms of skeletal improvement, TMJ safety, and patient acceptance.
Official title: Evaluation of the Efficacy of Functional Therapy Using Modified Twin Block Versus Clear Twin Block in Class II Skeletal Patients: A Randomized Controlled Clinical Trial
Key Details
Gender
All
Age Range
10 Years - 13 Years
Study Type
INTERVENTIONAL
Enrollment
40
Start Date
2026-05
Completion Date
2026-12
Last Updated
2026-05-27
Healthy Volunteers
No
Conditions
Interventions
Modified Twin Block Appliance
A modified Twin Block functional appliance incorporating progressive mandibular advancement and lower lip pads designed to modify muscular activity and enhance mandibular growth. The appliance is used for the treatment of skeletal Class II malocclusion due to mandibular retrusion in growing patients.
Conventional Clear Twin Block Appliance
A conventional clear Twin Block functional appliance used for correction of skeletal Class II malocclusion in growing patients. The appliance acts by posturing the mandible forward to stimulate functional and skeletal adaptation.