The Effect of Different Force Magnitudes on Maxillary Posterior Segment Intrusion

Study Overview
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Brief Summary
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A Randomized clinical trial comparing two different force magnitudes in maxillary posterior segment intrusion in adult patients with skeletal open bite malocclusion

Detailed Description
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This randomized controlled trial is aiming to study the effect of the different force magnitude on maxillary posterior segment intrusion. Two groups are going to be allocated and the amount and rate of intrusion will be measured and compared.

Official Title
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The Effect of Two Different Force Magnitudes on Maxillary Posterior Segment Intrusion in Adult Patients With Skeletal Open Bite Using Temporary Anchorage Devices- A Randomized Clinical Trial

Conditions
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Orthodontics

Intervention / Treatment
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* Device: Intrusion by 400 g


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Adult patients with an age range from 17 to 25. Skeletal open bite. Dental open bite that is due to overgrowth of maxillary posterior segment as seen clinically and that can be corrected without surgical intervention (a minimum of 3 mm and a maximum of 8 mm). Skeletal class I or mild to moderate skeletal class II that enables camouflage treatment. Normal incisor show on smiling (that makes the case indicated for molar intrusion and not for incisor extrusion). Full set of maxillary posterior dentition (first and second premolars, first molars at least). No previous orthodontic treatment. Exclusion Criteria: Medically compromised patients. Patients suffering from any congenital or hereditary diseases. Smoking or any systemic diseases. Chronic use of any medications including antibiotics, phenytoin, cyclosporin, anti-inflammatory drugs, systemic corticosteroids, and calcium channel blockers.

Ages Eligible for Study
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Minimum Age: 15 Years
Maximum Age: 25 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: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Intrusion by 200 g<br>Applying 200 g intrusive force for the maxillary posterior segment intrusion using miniscrews | Device: Intrusion by 400 g<br>* using miniscrews and coil springs to apply the intrusive force on maxillary posterior segment intrusion.<br>|
| Experimental: Intrusion by 400 g<br>Applying 400 g of Intrusive force for the maxillary posterior segment intrusion using miniscrews | Device: Intrusion by 400 g<br>* using miniscrews and coil springs to apply the intrusive force on maxillary posterior segment intrusion.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Amount of intrusion | The amount the upper posterior teeth have been intruded. | 6 months | 
| Rate of bite closure | The rate by which the open bite closes as a result of posterior segment intrusion | 6 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Average rate of intrusion | The amount of intrusion divided by the duration of intrusion | 6 months | 
| Root resorption | The amount of root resorption as a result of the intrusive force | 6 months | 
| Tipping | The amount of mesiodistal and buccolingual tipping of posterior teeth | 6 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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skelatal open bite, posterior intrusion