Evaluation of Incisors' Position Following Anterior Segment Retraction Using Friction Versus Frictionless Mechanics: A Randomized Clinical Trial
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 30
- 试验地点
- 1
- 主要终点
- Torque of the incisors
研究概览
简要总结
There's scarcity in literature concerning the issue of anterior segment retraction technique and its effect on anterior teeth position. Therefore, a randomized clinical trial has been chosen to investigate this issue, aiming to support clinicians with the best guidelines for anterior segment retraction.
详细描述
Thirty females with bimaxillary protrusion were randomly allocated into two groups. In one group, anterior segment retraction was commenced using an elastomeric chain rendering 160 g/side extending between mini-screw implant and a hook crimped on 0.017- by 0.025-inch stainless steel wire distal to the lateral incisor. In the other group, anterior segment retraction was done using closing T-loops fabricated from 0.017- by 0.025-inch titanium molybdenum alloy (TMA) wire rendering comparable retraction force. Three-dimensional analysis of incisors' buccolingual (BL)- torque, mesiodistal (MD)- tip, vertical position changes and root resorption were assessed using cone beam computed tomography scans.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Other
- 盲法
- Single (Outcomes Assessor)
盲法说明
Blinding of the main investigator to the interventions was difficult, yet the outcome assessor was masked to the intervention and assessed unidentified CBCTs
入排标准
- 年龄范围
- 13 Years 至 25 Years（Child, Adult）
- 性别
- Female
- 接受健康志愿者
- 是
入选标准
- •Female patients (Age 13- 25 y)
- •Class I molar relation (Angle's classification)
- •Bimaxillary protrusion requiring extraction of four first premolars and maximum anchorage.
- •full permanent dentition (except 3rd molars)
- •Good general and oral health
排除标准
- •Systemic disease or syndromes or on anti-inflammatory medication.
- •Extracted or missing permanent teeth (other than 3rd molars)
- •Badly decayed teeth (other than 1st premolars)
- •Parafunctional habits
- •History of previous orthodontics treatment
结局指标
主要结局
Torque of the incisors
时间窗: through study completion (Pre/post retraction), an average of 6 months
The change of the outer angle between long axis of each upper anterior tooth and palatal plane on CBCT pre and post retracation and the change in the outer angle between long axis of each lower anterior tooth and horizontal plane on CBCT pre and post retracation
Tip of the incisors
时间窗: through study completion (Pre/post retraction), an average of 6 months
The change of the angle between the long axis of the incisors and mid-sagittal plane on CBCT pre and post retracation
Vertical changes of the incisors
时间窗: through study completion (Pre/post retraction) , an average of 6 months
The change of the linear distance between the centroid of each maxillary anterior tooth and palatal Plane on CBCT pre and post retracation and The change of the linear distance between centroid of each mandibular anterior tooth and horizontal Plane on CBCT pre and post retracation
次要结局
- Root resorption of the anterior teeth(through study completion (Pre/post retraction), an average of 6 months)
研究者
Dorra Bakhit
Principal Investigator
Future University in Egypt