An interventional study of electric current and Traditional treatment in Class II Malocclusion, sponsored by Damascus University. Completed at 1 site in Syrian Arab Republic. Open to participants aged 16 Years to 25 Years. Per ClinicalTrials.gov, last updated 2023-04-07.
Sponsored by Damascus University · Not applicable, Interventional, and Treatment
Thirty-eight patients requiring extraction of maxillary first premolars and maximum anchorage to retract the upper anterior teeth will participate in the study. They will be divided randomly into two groups: electrical group and control group. In each group, en-masse retraction will be initiated after completion of the leveling and alignment phase via closed nickel-titanium coil springs applying 250 g of force per side, Mini-implants will be used as an anchor unit.
The dental changes will be detected using dental casts and to evaluate the rate of teeth retraction.
Prior to enrollment of each subject into the study, they will be examined completely to determine the orthodontic treatment plan. The operator will inform them about the aim of the study and ask them to provide a written informed consent.
Self-drilling titanium mini-implants (1.6mm diameter and 8mm length) will be used. They will be inserted between the maxillary second premolar and first molar at approximately 8-10mm above the archwires at the mucogingival junction and will be checked for primary stability (mechanical retention). Then the maxillary first premolar will be extracted. The maxillary arch will be levelled and aligned. The rectangular stainless steel archwires (0.019" × 0.025") with anterior 8mm height soldered hooks distal to the canines will be inserted.
A removable device containing a small electrical circuit will be applied to each patient to supply the required electric current.
Each patient in the electrical group will be asked to wear the device for five hours a day until the completion of the retraction of the upper anterior.
(250-300) g force will be applied on each side using two NiTi springs attached between the mini-implants and the soldered hooks in a direction approximately parallel to the occlusal plane for conducting an en-masse retraction. The force level will be measured every 2 weeks. Retraction will be stopped when a class I canine relationship will be achieved and a good incisor relationship will be obtained.
Dental casts will be used for the quantification of the anteroposterior movement of the anterior teeth and the first molars every 30 days until class I canine relationship will be achieved and a good incisor relationship will be obtained. Photographs of the upper casts will be taken with a central vertical projection on the occlusal plane and with a millimeter scale at the same level used to standardize and calibrate the conditions to match the casts when photographing them. Reference points will be used for upper casts study and the measurements will be calculated using the Image J computer program. To evaluate the movement of the anterior teeth: we will project the incisive edge on the median line and measure the distance from this point to the projected position of the medial end of the third palatine wrinkle on the median line.
To evaluate the movement of the first molars: we will project the mesial contact point of the first molar on the median line and measure the distance from this point to the to the projected position of the medial end of the third palatine wrinkle on the median line.
455 studies on the registry are indexed under Malocclusion; 89 are open to participants now.
This study's enrollment of 38 is close to the median of 36 across 371 interventional studies indexed under Malocclusion.
Browse Malocclusion studies →Damascus University is the lead sponsor of 206 studies on the registry; 10 are open to participants now.
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Class II Division 1 malocclusion:
Good oral and periodontal health:
Exclusion Criteria:
Poor oral hygiene or Current periodontal disease:
A removable device containing a small electrical circuit will supply the required electric current for five hours a day until the completion the retraction of the upper anterior teeth.
Device: electric current
The maxillary arch will be levelled and aligned. (250-300) g force will be applied on each side using two NiTi springs attached between the mini-implants and the soldered hooks in a direction approximately parallel to the occlusal plane for conducting an en-masse retraction.
Device: Traditional treatment
Electric current will be applied in this group of patients using removable device.
No acceleration method will be performed in this group.
Rate of retraction
Assessment will be performed on study models. The amount of distance being retracted in millimeters will be divided by the duration of retraction in weeks to give an estimation of the retraction rate.
Time frame: The calculation of the rate of retraction will be done once the retraction procedures has finished. Completion of this procedure is expected to occur within 6 months in the experimental group and 8 months in the control group.
Change in Incisors' positions
Amount of distance being traveled by the retracted anterior teeth is going to be measured on study models taken at monthly intervals until the end of the retraction phase.
Time frame: T0: 1 day before the beginning of retraction. T1: after 1 month (m) of retraction. T2: after 2 m of retraction. T3: after 3 m. T4: after 4 m. T5: at the end of retraction (expected to be within 6 m in the exp. group and 8 m in the control group)
Change in Molars' positions
Amount of distance being traveled by the first molars and is going to be measured on study models taken at monthly intervals until the end of the retraction phase.
Time frame: T0: 1 day before the beginning of retraction. T1: after 1 month (m) of retraction. T2: after 2 m of retraction. T3: after 3 m. T4: after 4 m. T5: at the end of retraction (expected to be within 6 m in the exp. group and 8 m in the control group)
Change in the inter-canine width
The change in the inter-canine width (mm/month) in each group will be calculated. Assessment will be performed on the dental casts by measuring the distance between the cusp tips of the two upper canines.
Time frame: T0: 1 day before the beginning of retraction. T1: after 1 month (m) of retraction. T2: after 2 m of retraction. T3: after 3 m. T4: after 4 m. T5: at the end of retraction (expected to be within 6 m in the exp. group and 8 m in the control group)
Change in the inter-molar width
The change in the inter-molar width (mm/month) in each group will be calculated. Assessment will be performed on the dental casts by measuring the distance between the central groove of the two first maxillary molars.
Time frame: T0: 1 day before the beginning of retraction. T1: after 1 month (m) of retraction. T2: after 2 m of retraction. T3: after 3 m. T4: after 4 m. T5: at the end of retraction (expected to be within 6 m in the exp. group and 8 m in the control group)
Plan to share: No
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Damascus University