Comparison of Maxillary Canine Retraction Rate With and Without Power Arm: A Split-Mouth Randomized Control Trial
试验速览
- 阶段
- 不适用
- 状态
- Enrolling By Invitation
- 发起方
- 入组人数
- 28
- 试验地点
- 1
- 主要终点
- Primary outcome measure
研究概览
简要总结
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?
详细描述
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
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 25 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •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.
排除标准
- •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.
研究组 & 干预措施
Power Arm sliding technique
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.
干预措施: Split-mouth randomized clinical trial (Procedure)
Control: direct sliding technique
Active Comparator / Control: direct sliding technique: Elastomeric chain applied directly from the canine bracket to a mini-screw on the contralateral side.
干预措施: Split-mouth randomized clinical trial (Procedure)
结局指标
主要结局
Primary outcome measure
时间窗: 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.
次要结局
- Secondary outcome measures(6 months)
研究者
Tanzila Rafique
Associate Professor
Bangladesh Medical University