Evaluation of Treatment Outcomes of Corticotomy-accelerated Upper Incisors' Retraction: A Randomized Controlled Trial
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 30
- 试验地点
- 2
- 主要终点
- Rate of retraction
研究概览
简要总结
We aim to assess the treatment outcomes following upper incisors retraction accelerated by corticotomy procedure. So, we intend to randomize orthodontic patients with class II division I malocclusion into two groups: experimental group and control group. Both groups will start orthodontic treatment. Once a 0.019*0.025-inch stainless steel wire is fully engaged to the brackets, 1st premolars will be extracted. Canines will be retracted in the conventional manner. Then, the actual evaluation period starts when the upper incisors are retracted using two different methods.
详细描述
In the last three decades, the number of adult patients seeking short orthodontic treatment time has apparently increased as the conventional orthodontic treatment usually lasts for 20-24 months. Furthermore, orthodontic treatment is often associated with root resorption, bone degradation and caries development. Patients nowadays desire to end the orthodontic treatment as soon as possible due to phsycosocial reasons and to get the goals of the treatment without affecting their social life .
So many tooth movement accelerating methods have been proposed. However, the surgical approached are considered the most effective and promising methods in accelerating tooth movement. The current research aims to evaluate the efficacy of the a new proposed surgical method compared to the conventional method in upper incisors' retraction.
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
- Single (Outcomes Assessor)
入排标准
- 年龄范围
- 15 Years 至 27 Years（Child, Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Adult patients 15 to 27 years , with permanent dentition , without hypodontia .
- •Overjet less than 10 mm
- •Normal or increased growth pattern (Diagnosed by Y-axis angle)
- •Mild to moderate crowding (Less than 3 mm)
- •After canines retraction , at least 3 mm space should be available distal the lateral incisors
- •Midline deviation shouldn't be more than 3 mm
排除标准
- •Medically contraindicated patients to oral surgery .
- •Existence of general health issue that affect orthodontic teeth movement
- •Previous orthodontic treatment
- •Mixed dentition
- •Hypodontia (Except third molars)
- •Bad oral hygiene
研究组 & 干预措施
Corticotomy-assisted Retraction
Corticotomy-assisted retraction will be performed in order to help in accelerating upper incisors' retraction
干预措施: Corticotomy-assisted Retraction (Procedure)
Conventional Retraction
Conventional retraction will be used in this group of patients by sliding mechanisms
结局指标
主要结局
Rate of retraction
时间窗: This will be measured at the completion of the retraction procedure, and is expected to take 2 months in the experimental group and four months in the control group.
The distance that the incisors moved during retraction divided by the time required to retract the four upper incisors to their ideal positions.
Time required for retraction
时间窗: This will be measured at the completion of the retraction procedure, and is expected to be within 2 months in the accelerated group and 4 months in the control group.
The time required from the beginning of incisors' retraction till the the completion of this procedure.
次要结局
- Change in the axial inclination of upper incisors(A radiograph will be taken at T1: one day before upper incisors' retraction and T2: one day after the completion of upper incisors' retraction. Completion of upper incisors' retraction is expected to be within 2 months in the accelerated group and 4 mo)
- Anchorage loss(This will be measured one day following the completion of retraction of the upper four incisors using plaster study models and is expected to be within 2 months in the accelerated group and 4 months in the control group)
- Root resorption(An panoramic image will be taken at T1: one day before the commencement of incisor retraction and T2: one day following the completion of retraction and is expected to be within 2 months in the accelerated group and 4 months in the control group)