The Effect of Different Force Magnitudes on Maxillary Posterior Segment Intrusion

Not Applicable

Completed

• Conditions: Orthodontics
• Interventions: Device: Intrusion by 400 g

• Registration Number: NCT02901678
• Lead Sponsor: Cairo University

Brief Summary

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

Detailed Description

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.

Study Timeline

• Study Start: 2015-11
• Study First Submitted: 2016-09-10
• Study First Submitted QC: 2016-09-10
• Study First Posted: 2016-09-15
• Primary Completion: 2018-04
• Study Completion: 2018-04
• Status Verified: 2018-08
• Last Update Submitted: 2018-08-01
• Last Update Posted: 2018-08-02

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 20

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.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Intrusion by 200 g	Intrusion by 400 g	Applying 200 g intrusive force for the maxillary posterior segment intrusion using miniscrews
Intrusion by 400 g	Intrusion by 400 g	Applying 400 g of Intrusive force for the maxillary posterior segment intrusion using miniscrews

Primary Outcome Measures

Name	Time	Method
Amount of intrusion	6 months	The amount the upper posterior teeth have been intruded.
Rate of bite closure	6 months	The rate by which the open bite closes as a result of posterior segment intrusion

Secondary Outcome Measures

Name	Time	Method
Average rate of intrusion	6 months	The amount of intrusion divided by the duration of intrusion
Root resorption	6 months	The amount of root resorption as a result of the intrusive force
Tipping	6 months	The amount of mesiodistal and buccolingual tipping of posterior teeth

Trial Locations

Locations (1)

Faculty of Dentistry; 🇪🇬 Cairo, Egypt