Maxillary Versus Bi-Maxillary Posterior Segments Intrusion Adult Subjects With Skeletal Open Bite

Study Overview
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Brief Summary
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Compare between bi-maxillary (maxillary and mandibular) posterior dento-alveolar intrusion and maxillary posterior dento-alveolar intrusion as regards open bite closure.

Detailed Description
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Now, maxillary posterior dento-alveolar intrusion has been validated as a conservative treatment modality for treatment of skeletal open bite in adult patients. However, it was proved that mandibular posterior teeth extrusion take place during the treatment which results in reduction in the amount of open. bite closure. Therefore, the aim of our study is to compare in a randomized clinical trial methodology between maxillary posterior dento-alveolar intrusion and combined maxillary and mandibular posterior dento-alveolar intrusion in terms of anterior open bite closure.

Official Title
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Maxillary Versus Bi-Maxillary Posterior Segments Intrusion in Treatment of Adult Subjects With Skeletal Open Bite - A Randomized Clinical Trial

Conditions
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Dental Malocclusion

Intervention / Treatment
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* Procedure: Maxillary posterior dento-alveolar intrusion


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Skeletal open bite with a dental open bite ranging from 3-8 mm. Adequate incisal show at rest and on smiling Full set of posterior teeth from first premolar to second molar (with the exception of one tooth in one quadrant). Exclusion Criteria: Dental open bites without skeletal components Previous orthodontic treatment Medically compromised patients

Ages Eligible for Study
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Minimum Age: 16 Years
Maximum Age: 25 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: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Maxillary posterior dento-alveolar intrusion<br>Mini-screw supported maxillary posterior dento-alveolar intrusion | Procedure: Maxillary posterior dento-alveolar intrusion<br>* Mini-screw supported maxillary or bi-maxillary posterior dento-alveolar intrusion<br>* Other names: Bi-maxillary posterior dento-alveolar intrusion;|
| Experimental: Bi-maxillary posterior dento-alveolar intrusion<br>Mini-screw supported bi-maxillary posterior dento-alveolar intrusion | Procedure: Maxillary posterior dento-alveolar intrusion<br>* Mini-screw supported maxillary or bi-maxillary posterior dento-alveolar intrusion<br>* Other names: Bi-maxillary posterior dento-alveolar intrusion;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Open bite closure clinically in millimeters using a digital caliper/ruler. | The amount of overbite gained as a result of posterior dento-alveolar intrusion | 6 months | 
| Maxillary posterior teeth intrusion radiographically in millimeters. | The distance travelled by maxillary premolars and molars of the right and left sides to a reference plane | 6 months | 
| Mandibular posterior teeth intrusion/extrusion radiographically in millimeters. | The distance travelled by mandibular premolars and molars of the right and left sides to a reference plane (mandibular plane) | 6 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Tipping of intruded teeth radiographically in degrees. | • Tipping is measured as the change in the angle between the long axis of the intruded teeth and the Frankfurt Horizontal plane as viewed sagitally (projected on the mid-sagittal plane). | 6 months | 
| Torque of intruded teeth radiographically in degrees. | • Torque change is measured as the change in the angle between the long axis of the intruded teeth and the mid-sagittal plane as viewed frontally (projected on the frontal plane). | 6 months | 
| Root resorption of intruded teeth in millimeters radiographically. | • The difference in the root lengths on the pre and post-intrusion CBCT's will be calculated. Root lengths will be measured from the buccal/mesiobuccal cusp tips to corresponding root apices for premolars and molars respectively. | 6 months | 
| Vertical skeletal measurements radiographically in millimeters or angles according to the measurement. | SN/MP: change in mandibular plane inclination relative to the cranial base. MMA: change in mandibular plane inclination relative to the maxillary plane. LAFH: change in lower anterior facial height. | 6 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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molar intrusion, open bite, mini-screws