Changes in Arch Parameters After Molar Distalization; Hybrid Hyrax Distalizer Versus Pendulum

Study Overview
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Brief Summary
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this study was to compare the changes in arch parameters after molar distalization; hybrid hyrax distalizer versus Pendulum distalizer using CBCT.

Detailed Description
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Evaluation of maxillary molar amount of distal movement and the amount of anchorage loss Arch length, arch width, arch depth

Official Title
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Changes in Arch Parameters After Molar Distalization; Hybrid Hyrax Distalizer Versus Pendulum in Adolescent Class II Patients Prospective Randomized Clinical Study

Conditions
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Angle Class 2 Malocclusion

Intervention / Treatment
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* Device: Hybrid hyrax distalizer
* Device: Pendulum distalizer


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: For group 1(Hybrid hyrax distalizer) Patients suffering maxillary collapse with a skeletal background with unilateral or bilateral posterior crossbite. For group 2 (Pendulum distalizer) Patients with skeletal class I or class II malocclusion who needed upper first and second molar distalization for incisor retraction or relieving of the upper arch crowding and minimum or no crowding in lower jaw were selected. All Patients had no systemic diseases that may affect bone quality or interfere with orthodontic treatment, periodontal disease and no previous orthodontic treatment. Age range was 13 to 17 years. Exclusion Criteria: Missed upper first molar. un-cooperative patient

Ages Eligible for Study
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Minimum Age: 13 Years
Maximum Age: 17 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Hybrid hyrax distalizer<br>Inverted hyrax with 2 miniscrews for 6 months for maxillary molar distal movement in class II angle malocclusion | Device: Hybrid hyrax distalizer<br>* class 2 Angle malocclusion<br>Device: Pendulum distalizer<br>* class 2 Angle malocclusion<br>|
| Active Comparator: Pendulum distalizer device<br>Modified pendulum with miniscrews for 6 months for maxillary molar distal movement in class II angle malocclusion | Device: Hybrid hyrax distalizer<br>* class 2 Angle malocclusion<br>Device: Pendulum distalizer<br>* class 2 Angle malocclusion<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Angles in degree SNA,SNB,ANB, Molar Rotation | Using cbct and cast | 6 months | 
| Arch parameters in millimeter Arch length, width,depth and circumference | Assessment of airway using cbct | 6 Months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Nasopharyngeal airway dimensions in Cubic centimeters | CBCT | 6 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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hybrid hyrax distalizer, Pendulum distalizer, class II division 1 and 2, molar distalization