An interventional study of Canine retraction in Class II Division 1 Malocclusion, Class III Malocclusion and Bimaxillary Protrusion, sponsored by Future University in Egypt. Status unknown at 1 site in Egypt. Open to participants aged 13 Years to 30 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2021-05-27.
Sponsored by Future University in Egypt · Not applicable, Interventional, and Treatment
Canine retraction after 1st premolar extracion into the extraction space is a routine treatment in orthodontics. Orthodontic patients requiring first premolar extraction, canine retraction and maximum anchorage were recruited for this randomized controlled trial. A search of the literature did not indicate the ideal frequency of elastomeric chain reactivation for optimum canine retraction. The study was approved by the ethical committee. The first premolars were extracted. Elastomeric chains were used to retract the canine distally into the 1st premolar space. The optimum reactivation interval was evaluated regarding the efficiency of treatment in terms of rate of canine retraction, canine tipping and rotation, root resorption and pain at the intervals of 2, 4, 6 and 8 weeks. Three dimensional imaging, as well as digital scanning were the methods for data collection.
The canines, 2nd premolars, 1st molars and 2nd molars were bonded and banded. Leveling and alignment was achieved. After the first premolar extraction, temporary anchorage devices were inserted interradicular between 2nd premolar and 1st molar. Canine retraction was performed on a 0.016" X 0.022" stainless steel arch wire. A power arm was extended to apply the force closer to the center of resistance and achieve bodily movement. Elastomeric chains were calibrated to deliver a force of 150g and extended from the power arm to the mini screws directly. Recruited patients were randomly allocated to four groups according to the duration between the elastomeric chain reactivation. Canine reactivation intervals were 2, 4, 6, or 8 weeks. Cone beam computed tomography was performed before canine retraction and after 6 months of retraction. Digital dental casts were taken before canine retraction and monthly for 6 months.
124 studies on the registry are indexed under Malocclusion, Angle Class II; 19 are open to participants now.
This study's planned enrollment of 56 is above the median of 34 across 115 interventional studies indexed under Malocclusion, Angle Class II.
Browse Malocclusion, Angle Class II studies →Future University in Egypt is the lead sponsor of 104 studies on the registry; 31 are open to participants now.
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Exclusion Criteria:
Replacement of elastomeric chain every 2 weeks and reestablishing a 150 g force
Procedure: Canine retraction
Replacement of elastomeric chain every 4 weeks and reestablishing a 150 g force
Procedure: Canine retraction
Replacement of elastomeric chain every 6 weeks and reestablishing a 150 g force
Procedure: Canine retraction
Replacement of elastomeric chain every 8 weeks and reestablishing a 150 g force
Procedure: Canine retraction
Canines will be retracted using short elastomeric chains. Force applied to canines will be 150g.
Rate of canine retraction
The distance measured between the canine cusp tips for each two consecutive digital models superimposed on the right and left medial palatal rugae.
Time frame: Baseline to 1 month
Rate of canine retraction
The distance measured between the canine cusp tips for each two consecutive digital models superimposed on the right and left medial palatal rugae.
Time frame: 1month to 2 months
Rate of canine retraction
The distance measured between the canine cusp tips for each two consecutive digital models superimposed on the right and left medial palatal rugae.
Time frame: 2 months to 3 months
Rate of canine retraction
The distance measured between the canine cusp tips for each two consecutive digital models superimposed on the right and left medial palatal rugae.
Time frame: 3 months to 4 months
Rate of canine retraction
The distance measured between the canine cusp tips for each two consecutive digital models superimposed on the right and left medial palatal rugae.
Time frame: 4 months to 5 months
Rate of canine retraction
The distance measured between the canine cusp tips for each two consecutive digital models superimposed on the right and left medial palatal rugae.
Time frame: 5 months to 6 months.
Amount of canine retraction
The change in distance measured from the canine cusp tip to the frontal plane, in millimeters; measured on CBCT
Time frame: Baseline to 6 months
Canine tipping
CBCT images at T0 and T1 were analyzed using Invivo 5 software. linear measurements were made from the long axis of the canines (cusp tip to root apex) to FP1 and FP2 for the upper and lower canines, respectively.
Time frame: Baseline to 6 months
Canine rotation
The change in the angle between a line connecting the maximum mesial and distal crown convexities and FP1 and FP2, for the upper and lower canines, respectively; measured on CBCT
Time frame: Baseline to 6 months
Canine root resorption
The change in the canine length, in millimeters, measured from cusp tip to root apex; measured on CBCT
Time frame: Baseline to 6 months
First molar anchorage loss
The change in distance measured from the mesio-buccal cusp tip of the first molar to the frontal plane, in millimeters; measured on CBCT
Time frame: Baseline to 6 months
Pain score
The patient makes a mark along the Visual Analogue Scale (VAS) scale denoting the severity of pain: 0-100 0= no pain and 100= worst pain imaginable
Time frame: baseline to day 1
Pain score
The patient makes a mark along the Visual Analogue Scale (VAS) scale denoting the severity of pain: 0-100 0= no pain and 100= worst pain imaginable
Time frame: Baseline to day 2
Pain score
The patient makes a mark along the Visual Analogue Scale (VAS) scale denoting the severity of pain: 0-100 0= no pain and 100= worst pain imaginable
Time frame: Baseline to day 3
Pain score
The patient makes a mark along the Visual Analogue Scale (VAS) scale denoting the severity of pain: 0-100 0= no pain and 100= worst pain imaginable
Time frame: Baseline to day 4
Pain score
The patient makes a mark along the Visual Analogue Scale (VAS) scale denoting the severity of pain: 0-100 0= no pain and 100= worst pain imaginable
Time frame: Baseline to day 5
Pain score
The patient makes a mark along the Visual Analogue Scale (VAS) scale denoting the severity of pain: 0-100 0= no pain and 100= worst pain imaginable
Time frame: Baseline to day 6
Pain score
The patient makes a mark along the Visual Analogue Scale (VAS) scale denoting the severity of pain: 0-100 0= no pain and 100= worst pain imaginable
Time frame: Baseline to day 7
Pain score
The patient makes a mark along the Visual Analogue Scale (VAS) scale denoting the severity of pain: 0-100 0= no pain and 100= worst pain imaginable
Time frame: Baseline to day 8
Pain score
The patient makes a mark along the Visual Analogue Scale (VAS) scale denoting the severity of pain: 0-100 0= no pain and 100= worst pain imaginable
Time frame: Baseline to day 9
Pain score
The patient makes a mark along the Visual Analogue Scale (VAS) scale denoting the severity of pain: 0-100 0= no pain and 100= worst pain imaginable
Time frame: Baseline to day 10.
Plan to share: No
No publications or documents are linked to this record.
Started Apr 2017 (actual). Primary completion is estimated for Jun 2022, 62 months after the start.
Of 86 non-industry interventional studies with no phase under Malocclusion, Angle Class II, half reached primary completion within 15 months of starting (the median), counting those still running; a quarter within 11 and three quarters within 22. This study's planned 62 months is above that.
Counting every sponsor, half of 86 studies reached it within 15 months; a quarter within 11 and three quarters within 22.
How these figures are worked out, and which studies are left out of them.
This study is status unknown, as verified in May 2021. You cannot join it, but the record below documents what was studied.
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Malocclusion, Angle Class II →