Comparison of Maxillary Canine Retraction Rate With and Without Power Arm

N/AEnrolling By InvitationNCT07836816

Tanzila Rafique28 enrolled

Overview

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?

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 Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

NONE

Enrollment

Eligibility

Sex: ALLMin age: 18 YearsMax age: 25 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * 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. Exclusion Criteria: * 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. * Participants requiring surgical orthodontic treatment. * Pregnant women. * Participants with poor cooperation, missed appointments, or frequent appliance breakage. * Habit of smoking.

Outcomes

Primary Outcomes

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.

Time frame: 6 months

Secondary Outcomes

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.