- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02951286
Molar Intrusion Using High Pull Headgear
Skeletal and Dentoalveolar Changes Following Posterior Teeth Intrusion With High Pull Headgear in The Treatment of Patients With Anterior Open Bite
This prospective clinical study will evaluate the effect of high pull headgear for molar intrusion, compared with the control group, in adolescent patients with open bite malocclusion.
The study sample will consist of 24 patients with anterior open bite divided equally in two groups. The sample will be collected consecutively from patients attending the Orthodontic Department at Damascus university.
A modified version of the OBA (Open Bite Appliance),introduced by Erverdi and Usumez, will be applied for all patients. High pull headgears will be used in the first group, while, in the second (control) group, Open Bite Appliances will be used only.
The skeletal and dentoalveolar changes occurring after intrusion of posterior teeth will be assessed by using posteroanterior and lateral cephalometric radiographs; pre- and post- treatment changes for each group will be evaluated.
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Open bite malocclusion is considered one of the most difficult malocclusion to correct in orthodontic treatment because it appears as a result of different etiological factors such as genetic, dental, skeletal, functional, soft tissue, and habits that play roles in its development. Different treatment modalities used for the treatment of an anterior open bite. Multiloop edgewise archwires, miniscrews, high-pull headgear, and bite blocks have been used for anterior open bite patients, most open bite patients characterized by increased facial height, class II skeletal pattern, and vertical excess in maxillary posterior teeth.
Functional appliances, magnets, posterior bite blocks, and high pull headgear are used for posterior teeth intrusion. It is possible to generate intrusive force by using high pull headgear. Furthermore, direction of force can be changed according to the center of resistance of the dental units to achieve a better tooth movement control. The intrusion of posterior teeth will lead to decreased lower facial height by a counterclockwise rotation of the mandible; and improve class II skeletal relationship.
This study was the first clinical trial, that compare the effect of high pull headgear for molar intrusion with the control group in adolescent patients.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
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Damascus, Syrian Arab Republic, 00963
- Damascus University
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Patients with skeletal open bite determined by an increased B angle (angle between maxillary plane and mandibular plane), sum of Bjork and the mandibular plane angle (angle between SN plane and mandibular plane).
- patients between 12 and 18 years old with permanent dentition stage.
- Negative over bite of more than a mm
- Class I and Class II skeletal anteroposterior relationship.
Exclusion Criteria:
- Previous orthodontic treatment.
- Patients with syndromes, clefts, or craniofacial abnormalities.
- Class III skeletal anteroposterior relationship.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: TREATMENT
- Allocation: NON_RANDOMIZED
- Interventional Model: PARALLEL
- Masking: SINGLE
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
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Experimental: high pull headgear + OBA
A modified version of the Open Bite Appliance (OBA),introduced by Erverdi and Usumez, will be applied with high pull headgear for Orthoclassic ®1300 NE Alpha Drive, McMinnville, OR 97128 USA 866.752.0065.
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a modified version of the OBA (Open Bite Appliance),introduced by Erverdi and Usumez, will be applied in compination with a high pull headgear.
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Experimental: OBA (control group)
A modified version of the Open Bite Appliance (OBA),introduced by Erverdi and Usumez, will be applied only.
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A modified version of the OBA (Open Bite Appliance),introduced by Erverdi and Usumez, will be applied alone (Control group)
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Overbite
Time Frame: This variable will be evaluated twice; T0 before treatment, and T1 at the end of molar intrusion which will be abroximately after 7 months.
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The distance between the incisal edges of the upper and lower incisors, measured in mm.
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This variable will be evaluated twice; T0 before treatment, and T1 at the end of molar intrusion which will be abroximately after 7 months.
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Anterior facial height
Time Frame: This variable will be evaluated twice; T0 before treatment, and T1 at the end of molar intrusion which will be approximately after 7 months
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The distance between the point "N" and the point "Me"
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This variable will be evaluated twice; T0 before treatment, and T1 at the end of molar intrusion which will be approximately after 7 months
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Molar intrusion
Time Frame: This variable will be evaluated twice; T0 before treatment, and T1 at the end of molar intrusion which will be approximately after 7 months
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The vertical distance between upper molars and the true horizontal plane (measured in mm)
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This variable will be evaluated twice; T0 before treatment, and T1 at the end of molar intrusion which will be approximately after 7 months
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Mandibular autorotation
Time Frame: This variable will be evaluated twice; T0 before treatment, and T1 at the end of molar intrusion which will be approximately after 7 months
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This variable will be measured by superimposition of the anterior cranial base
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This variable will be evaluated twice; T0 before treatment, and T1 at the end of molar intrusion which will be approximately after 7 months
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Change in the anteroposterior position of the point "B"
Time Frame: This variable will be evaluated twice; T0 before treatment, and T1 at the end of molar intrusion which will be approximately after 7 months
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The horizontal distance between point "B" and the true vertical plane
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This variable will be evaluated twice; T0 before treatment, and T1 at the end of molar intrusion which will be approximately after 7 months
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Collaborators and Investigators
Sponsor
Investigators
- Study Director: Mohamad Yousef, DDS MSc PhD, Damascus University
Publications and helpful links
General Publications
- Deguchi T, Kurosaka H, Oikawa H, Kuroda S, Takahashi I, Yamashiro T, Takano-Yamamoto T. Comparison of orthodontic treatment outcomes in adults with skeletal open bite between conventional edgewise treatment and implant-anchored orthodontics. Am J Orthod Dentofacial Orthop. 2011 Apr;139(4 Suppl):S60-8. doi: 10.1016/j.ajodo.2009.04.029.
- Hart TR, Cousley RR, Fishman LS, Tallents RH. Dentoskeletal changes following mini-implant molar intrusion in anterior open bite patients. Angle Orthod. 2015 Nov;85(6):941-8. doi: 10.2319/090514-625.1. Epub 2014 Dec 22.
- Lee J, Miyazawa K, Tabuchi M, Kawaguchi M, Shibata M, Goto S. Midpalatal miniscrews and high-pull headgear for anteroposterior and vertical anchorage control: cephalometric comparisons of treatment changes. Am J Orthod Dentofacial Orthop. 2013 Aug;144(2):238-50. doi: 10.1016/j.ajodo.2013.03.020.
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- UDDS-Ortho-02-2016
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
IPD Plan Description
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