Orthodontic AnchorageNCT07836816
Comparison of Maxillary Canine Retraction Rate With and Without Power Arm
A study testing Split-mouth randomized clinical trial in people with Orthodontic Anchorage and Power Arm Sliding, run by Tanzila Rafique at 1 site in Bangladesh.
Trial summary
The goal of this split-mouth randomized clinical trial is to compare maxillary canine retraction with and without power arm during fixed orthodontic treatment.The main question it aims to answer is What are the differences in the rate of maxillary canine retraction between the power- arm technique and the direct… Read more about this study
- Who is it for?
- Ages 18 to 25 yearsHealthy volunteers can take part
- Conditions the study is for
- Orthodontic Anchorage, Power Arm Sliding, Direct Sliding
- What is being tested?
- Split-mouth randomized clinical trial
- Type of treatment
- Surgery or procedure
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 28 participants
- Where
- 1 siteBangladesh
- Study dates
- 18 Aug 2026to 17 Aug 2027
- Phase
- Interventional
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 25 years
- All sexes
- Healthy volunteers accepted
- Adult
Who may be able to join
- Participant with Angle's class I and class II malocclusion who required both maxillary bilateral premolar extraction for orthodontic treatment.
- Participants who required maximum anchorage.
- Participants with good general health condition and oral hygiene status.
- Age range of the participants will be 18 to 25 years.
- Sex of the participants will be both male and female.
- Participants with full permanent dentition present (excluding 3 rd molar).
- Participants who have completed the levelling and alignment phase before the start of canine retraction.
- Participants with no caries, fracture, periapical lesion, root resorption, morphological variation or other pathology involving the maxillary canine.
Who cannot join
- Participants with systemic conditions affecting bone metabolism or orthodontic tooth movement (e.g., diabetes mellitus, osteoporosis).
- Participants with impacted or displaced maxillary canines.
- Participants with retained deciduous canines.
- Participants with dental anomalies affecting canine retraction.
- Participants with previous orthodontic treatment.
- Participants with cleft lip/palate, craniofacial syndromes, or facial asymmetry.
Show all 10Show fewer
- Participants requiring surgical orthodontic treatment.
- Pregnant women.
- Participants with poor cooperation, missed appointments, or frequent appliance breakage.
- Habit of smoking.
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
Bangladesh1 site
Bangladesh Medical University (BMU), Dhaka,1000
Dhaka, 1215
About this study
Official title: Comparison of Maxillary Canine Retraction Rate With and Without Power Arm: A Split-Mouth Randomized Control Trial
The goal of this split-mouth randomized clinical trial is to compare maxillary canine retraction with and without power arm during fixed orthodontic treatment.The main question it aims to answer is What are the differences in the rate of maxillary canine retraction between the power- arm technique and the direct sliding technique over a 6-month period time?
Read the detailed description
Researchers will compare a power arm placed in the vertical slot of the canine bracket with elastomeric chain to a mini-screw (experimental/PAS) against a conventional elastomeric chain from the canine bracket directly to a mini-screw (control/DS) during canine retraction phase.
Participants will:
- undergo bilateral maxillary first premolar extractions, followed by placement of a titanium mini-screw or TAD (Vector TAS, 1.4×8.0 mm) between second premolar and first molar on each side for anchorage.
- receive fixed orthodontic treatment using a pre-adjusted edgewise appliance system (Roth, 0.018-inch slot).
- have levelling and alignment carried out using a graduated arch-wire sequence (0.014-inch, 0.016-inch, 0.016×0.016-inch, 0.016×0.022-inch, and 0.017×0.025-inch), with angulation corrections addressed at this stage.
- have bilateral canine retraction initiated three months post-extraction on a 0.016×0.022-inch stainless steel arch-wire, with an elastomeric chain attaching from the power arm to the mini-screw on the experimental (PAS) side and directly from the canine bracket to the mini-screw on the control (DS) side, under a standardized force of 150g reactivated every 21 days.
- be evaluated via CBCT at baseline (T0) and at 3 and 6 months (T1, T2) to measure canine retraction rate and angulation change on both sides
- Conditions
- Orthodontic Anchorage, Power Arm Sliding, Direct Sliding, Orthodontic Space Closure, Cuspid, Cone-Beam Computed Tomography
- Being tested
- Split-mouth randomized clinical trial
- Keywords
- Canine retraction,, Power arm sliding, Sliding mechanics, Direct sliding, Mini-screw anchorage
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Split-mouth randomized clinical trialProcedure or surgery
Also called Experimental: Power Arm sliding technique, Active Comparator / Control: direct sliding technique
Experimental: Power Arm sliding technique: A power arm placed in the vertical slot of the canine bracket and elastomeric chain attached from power arm to mini-screw.
Active Comparator / Control: direct sliding technique:
Elastomeric chain applied directly from the canine bracket to a mini-screw on the contralateral side.
| Study group | Role | What they receive |
|---|---|---|
| Power Arm sliding technique | Experimental | Experimental: Power Arm sliding techniqueA power arm placed in the vertical slot of the canine bracket and elastomeric chain attached from power arm to mini-screw. Receives: Procedure: Split-mouth randomized clinical trial |
| Control: direct sliding technique | Active comparator | Active Comparator / Control: direct sliding technique: Elastomeric chain applied directly from the canine bracket to a mini-screw on the contralateral side. Receives: Procedure: Split-mouth randomized clinical trial |
What is being measured
The primary outcome is the main question the study is designed to answer.
Primary outcome measure
This split-mouth randomized clinical trial will compare maxillary canine retraction (in mm) with and without a power arm during fixed orthodontic treatment.
Measured: 6 months
Secondary outcomes (1)
Secondary outcome measures
- Participants will receive fixed orthodontic treatment using a pre-adjusted edgewise appliance system (Roth, 0.018-inch slot).
- Bilateral maxillary first premolar extractions will be done followed by placement of a titanium mini-screw or TAD (Vector TAS, 1.4×8.0 mm) between the second premolar and first molar on each side.
- Levelling and alignment will be carriedout using a graduated arch-wire sequence (0.014-inch, 0.016-inch, 0.016×0.016-inch, 0.016×0.022-inch, and 0.017×0.025-inch).
- Bilateral canine retraction will be initiated three months post-extraction on a 0.016×0.022-inch stainless steel arch-wire, with an elastomeric chain attaching from the power arm to the mini-screw on the experimental (PAS) side and directly from the canine bracket to the mini-screw on the control (DS) side, under a force of 150g reactivated every 21 days.
- Evaluation will be done at 3 and 6 months to measure canine retraction rate (in mm) and angulation changes(in degrees) at both side.
Measured: 6 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted23 Sep 2026
- Study start18 Aug 2026
- Primary completion17 Aug 2027 (estimated)
- Study completion17 Aug 2027 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Orthodontic AnchorageStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Model description
- Each participant act as their control. After bilateral maxillary first premolar extraction, one quadrant is randomly assigned to receive power arm before retraction, while the contralateral quadrant undergoes standard direct sliding technique without power arm.
- Masking
- None (open label)
- Enrolment
- 28 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Tanzila Rafique
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor-investigator, Tanzila Rafique, Bangladesh Medical University
- Investigators
- Mahmood Sajedeen, BDS,FCPS, Study director, Bangladesh Medical University (BMU)Sajedeen, Study director, Bangladesh Medical University (BMU), Dhaka-1000
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07836816
- Sponsor's protocol ID
- BMU/2026/8639
- Status last verified
- Sep 2026
- First submitted
- 3 Sep 2026
- Last updated
- 24 Sep 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 24 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Comparison of Maxillary Canine Retraction Rate With and Without Power Arm: A Split-Mouth Randomized Control Trial
- ClinicalTrials.gov ID
- NCT07836816
- Acronym / sponsor ID
- BMU/2026/8639
- Conditions
- Orthodontic Anchorage, Power Arm Sliding, Direct Sliding, Orthodontic Space Closure, Cuspid, Cone-Beam Computed Tomography
- Keywords
- Canine retraction,, Power arm sliding, Sliding mechanics, Direct sliding, Mini-screw anchorage
- Study type
- Interventional
- Recruitment status
- Enrolling by invitation
- Enrolment
- 28 participants (estimated)
- Lead sponsor
- Tanzila RafiqueUniversity, hospital or other
- Study start
- 18 Aug 2026 (actual)
- Primary completion
- 17 Aug 2027 (estimated)
- Study completion
- 17 Aug 2027 (estimated)
- First posted
- 23 Sep 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The goal of this split-mouth randomized clinical trial is to compare maxillary canine retraction with and without power arm during fixed orthodontic treatment.The main question it aims to answer is What are the differences in the rate of maxillary canine retraction between the power- arm technique and the direct sliding technique over a 6-month period time?
Detailed description
Researchers will compare a power arm placed in the vertical slot of the canine bracket with elastomeric chain to a mini-screw (experimental/PAS) against a conventional elastomeric chain from the canine bracket directly to a mini-screw (control/DS) during canine retraction phase.
Participants will:
- undergo bilateral maxillary first premolar extractions, followed by placement of a titanium mini-screw or TAD (Vector TAS, 1.4×8.0 mm) between second premolar and first molar on each side for anchorage.
- receive fixed orthodontic treatment using a pre-adjusted edgewise appliance system (Roth, 0.018-inch slot).
- have levelling and alignment carried out using a graduated arch-wire sequence (0.014-inch, 0.016-inch, 0.016×0.016-inch, 0.016×0.022-inch, and 0.017×0.025-inch), with angulation corrections addressed at this stage.
- have bilateral canine retraction initiated three months post-extraction on a 0.016×0.022-inch stainless steel arch-wire, with an elastomeric chain attaching from the power arm to the mini-screw on the experimental (PAS) side and directly from the canine bracket to the mini-screw on the control (DS) side, under a standardized force of 150g reactivated every 21 days.
- be evaluated via CBCT at baseline (T0) and at 3 and 6 months (T1, T2) to measure canine retraction rate and angulation change on both sides
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
- Model description
- Each participant act as their control. After bilateral maxillary first premolar extraction, one quadrant is randomly assigned to receive power arm before retraction, while the contralateral quadrant undergoes standard direct sliding technique without power arm.
| Arm | Type | Receives |
|---|---|---|
| Power Arm sliding technique | Experimental | Procedure: Split-mouth randomized clinical trialExperimental: Power Arm sliding techniqueA power arm placed in the vertical slot of the canine bracket and elastomeric chain attached from power arm to mini-screw. |
| Control: direct sliding technique | Active comparator | Procedure: Split-mouth randomized clinical trialActive Comparator / Control: direct sliding technique: Elastomeric chain applied directly from the canine bracket to a mini-screw on the contralateral side. |
Who may qualify
- Ages
- 18 to 25 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (8 listed)
- Participant with Angle's class I and class II malocclusion who required both maxillary bilateral premolar extraction for orthodontic treatment.
- Participants who required maximum anchorage.
- Participants with good general health condition and oral hygiene status.
- Age range of the participants will be 18 to 25 years.
- Sex of the participants will be both male and female.
Key exclusion criteria (10 listed)
- Participants with systemic conditions affecting bone metabolism or orthodontic tooth movement (e.g., diabetes mellitus, osteoporosis).
- Participants with impacted or displaced maxillary canines.
- Participants with retained deciduous canines.
- Participants with dental anomalies affecting canine retraction.
- Participants with previous orthodontic treatment.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Split-mouth randomized clinical trialAlso: Experimental: Power Arm sliding technique, Active Comparator / Control: direct sliding techniqueExperimental: Power Arm sliding technique: A power arm placed in the vertical slot of the canine bracket and elastomeric chain attached from power arm to mini-screw. Active Comparator / Control: direct sliding technique: Elastomeric chain applied directly from the canine bracket to a mini-screw on the contralateral side. | Procedure or surgery | Control: direct sliding technique, Power Arm sliding technique |
Primary outcome
Primary outcome measure
Time frame: 6 months
This split-mouth randomized clinical trial will compare maxillary canine retraction (in mm) with and without a power arm during fixed orthodontic treatment.
1 secondary outcome
Secondary outcome measures
Time frame: 6 months
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 24 Sep 2026.
- Individual participant dataSharing planned: No
Related trials for Orthodontic Anchorage
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Maxillary Arch Distalization With Infrazygomatic Crest Miniscrews for Class II Malocclusion
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Maxillary Canine Retraction Using Stainless Steel and Titanium-molybdenum Alloy Wires in TAD-supported Segmental Mechanics
Malocclusion, Canine Retraction
Recruiting
Effect of Early Versus Late Premolar Extraction on Orthodontic Tooth Movement
Malocclusion Class II, Malocclusion, Angle Class I
Enrolling by invitation
Failure Rate of Infra-Zygomatic Orthodontic Mini-Screws
Orthodontic Anchorage Procedures
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Miniscrew Stability and Peri-implant Inflammation When Precoated K21 vs Ethanol Control
Inflammation Caused by the Placement of a Temporary Anchorage Device
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Mahmood Sajedeen, BDS,FCPS study director
Bangladesh Medical University (BMU)
Sajedeen study director
Bangladesh Medical University (BMU), Dhaka-1000
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Split-mouth randomized clinical trial in people with Orthodontic Anchorage and Power Arm Sliding, run by Tanzila Rafique at 1 site in Bangladesh.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 8 inclusion and 10 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: enrolling by invitation, as of the sponsor's last update on 24 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Bangladesh. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Primary outcome measure (time frame: 6 months). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 24 Sep 2026.