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

Study Overview
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Brief Summary
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Patients with skeletal class II malocclusion who have a retracted lower jaw will be treated in this study. The efficacy of clear Plates in the treatment of Skeletal Class II Malocclusion will be assessed. The skeletal, dental and soft tissues changes resulted by this intervention will be studied and compared with the results of Traditional treatment with fixed appliances.

Detailed Description
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There are two group: a group of patients in which participants will be undergo to Modified Twin-Block Appliance with Clear Plates. a group of patients in which participants will be undergo to the traditional Twin-Block Appliance. phase Intervention/treatment Condition or disease Not applicable Other: Modified Twin-Block Appliance with Clear Plates. Other: Traditional Twin-Block Appliance. Skeletal class II Malocclusion

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

Conditions
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Malocclusion, Angle Class II

Intervention / Treatment
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* Device: Modified Twin-Block Appliance with Clear Plates.
* Device: Traditional Twin-Block appliance


Participation Criteria
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Eligibility Criteria
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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.

Ages Eligible for Study
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Minimum Age: 10 Years
Maximum Age: 13 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

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: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: : Modified Twin-Block Appliance with Clear Plates.<br>Clear plates technique A group of patients in which participants will be undergo to clear plates treatment will be applied to the upper and lower arch 17 hours daily Experimental : Modified Twin-Block Appliance with Clear Plates. | Device: Modified Twin-Block Appliance with Clear Plates.<br>* Clear plates technique A group of patients in which participants will be undergo to clear plates treatment will be applied to the upper and lower arch 17 hours daily<br>|
| Experimental: Traditional Twin-Block appliance<br>Traditional Twin-Block appliance A group of patients in which participants will undergo to the Traditional Twin-Block appliance Treatment, appliances will be applied to the upper and lower arch 17 hours daily | Device: Traditional Twin-Block appliance<br>* Traditional Twin-Block appliance A group of patients in which participants will undergo to the Traditional Twin-Block appliance Treatment, appliances will be applied to the upper and lower arch 17 hours daily<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in the SNA angle[ | This angle the represents the position of the upper jaw in the cephalometric analysis in the anteroposterior direction. Lateral cephalograms will be taken and this angle is going to be measured in degrees. | : T0:1 day before the beginning of treatment . T1: when a normal overjet and canines class I relationships achieved (expected to be within 6-9 months in the exp. Group and control group) | 
| change in the SNB angle [ | This angle the represents the position of the lower jaw in the cephalometric analysis in the anteroposterior direction. Lateral cephalograms will be taken and this angle is going to be measured in degrees. | : T0:1 day before the beginning of treatment . T1: when a normal overjet and canines class I relationships achieved (expected to be within 6-9 months in the exp. Group and control group) | 
| change in the mandibular length | Amount of distance measured from the Co point to Gn point in the cephalometric analysis. Lateral cephalograms will be taken and this angle is going to be measured in degrees. | T0: 1day before the beginning of treatment . T1: when a normal overjet and canines class I relationships achieved (expected to be within 6-9 months in the exp. Group and control group) | 
| change in overjet | Represents The distance between the most anterior point on the lower incisor to the most anterior point on the upper incisor in the cephalometric analysis. | T0: 1 day before the beginning of treatment . T1: when a normal overjet and canines class I relationships achieved (expected to be within 6-9 months in the exp. Group and control group) | 
| change in the vertical position of incisors | The vertical distance from the edge of the lower incisor to the mandibular plane. | : T0: 1 day before the beginning of treatment . T1: when a normal overjet and canines class I relationships achieved (expected to be within 6-9 months in the exp. Group and control group) |