Evaluation of the Rate of 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
- Rate of Anterior Segment Retraction
研究概览
简要总结
The rate of anterior segment retraction in bi-maxillary protrusion cases was evaluated comparing the friction and friction-less mechanics. since, there has been a lack of clear cut guidelines for clinicians for the optimum method for retraction, this randomized clinical trial was done.
详细描述
Thirty bi-maxillary protrusion female patients were randomly allocated into either intervention groups. In the Friction group, retraction was accomplished using elastomeric power chains extending from crimpable hooks distal to the lateral incisors, on 0.017x0.025-inch Stainless Steel wires, to the mini-screws . While in the friction-less group with retraction done using T- loop springs made of 0.017x0.025-inch titanium molybdenum wires. Retraction force was set to 160g per side in both intervention groups. Activation was done every four weeks. Rate of anterior segment retraction was evaluated via digital models.
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 principal investigator was not possible due to the nature of the interventions. However, the outcome assessor was blinded to the interventions and all digital models were unidentified during outcome assessment.
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 Subjects.
- •Age 13-25 y of age.
- •Skeletal Angle Class I malocclusion with Bimaxillary dentoalveolar protrusion in need of four 1st premolar extractions with maximum anchorage.
- •Fully erupted permanent dentition without crowding.
- •Good oral and general health.
排除标准
- •Systemic Diseases or syndromes or on anti-inflammatory medication.
- •Extracted or missing permanent teeth.
- •History of previous Orthodontic Treatment.
- •Parafunctional Habits.
- •Badly decayed teeth.
结局指标
主要结局
Rate of Anterior Segment Retraction
时间窗: The start of anterior segment retraction up to complete space closure, an average of 6 months.
The rate of anterior segment retraction per month was measured on monthly digital models.
次要结局
- Anchorage Loss(The start of anterior segment retraction up to complete space closure, an average of 6 months.)
- Pain experienced after each activation of the two mechanics(The start of anterior segment retraction up to complete space closure, an average of 6 months.)
研究者
Monica Guirguis Youssif Tawfik
Principal Investigator
Future University in Egypt