The Effect of Different Treatment Modalities of Class II Malocclusion on Upper Third Molars: A Retrospective Longitudinal Study
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 46
- 试验地点
- 1
- 主要终点
- The angulation of the maxillary third molars.
研究概览
简要总结
What is the effect of the different treatment modalities (distalization versus upper premolar extraction) of class II malocclusion on the position, inclination and incidence of impaction of the upper third molars?
详细描述
What is the effect of the different treatment modalities (distalization versus upper premolar extraction) of class II malocclusion on the position, inclination and incidence of impaction of the upper third molars? Pico P: Adolescent patients with class II malocclusion having bilateral developing upper third molars.
I: bilateral upper first premolar extraction orthodontic treatment with moderate anchorage.
C: distalization orthodontic treatment. O: Primary: angulation of the maxillary third molars.
研究设计
- 研究类型
- Observational
- 观察模型
- Case Control
- 时间视角
- Retrospective
入排标准
- 年龄范围
- 16 Years 至 18 Years（Child, Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Adolescent males and females (16 -18 years) with Bilaterally developing maxillary third molars. Not more than two thirds of the root development of the third molars had taken place.
- •Class II malocclusion cases that were treated by 1) maxillary premolar extraction with a moderate anchorage requirement and achieved full unit class II molar relationship or 2) Distalization treatment plan and class I molar relationship was achieved.
- •Patients with high-quality pre- and post-treatment radiographs.
- •Normal or increased vertical dimension.
排除标准
- •Maxillary Premolar extraction cases requiring maximum anchorage preparation.
- •Low vertical dimension.
- •Patients without dentofacial deformities, severe facial asymmetries, microdontia or hypodontia.
结局指标
主要结局
The angulation of the maxillary third molars.
时间窗: up to 24 weeks.
the angle between the long axis of the third molar and the palatal plane
次要结局
- The vertical position of the third molars(up to 24 weeks)
- The mineralization status of the third molars(up to 24 weeks)
研究者
Amira Aboalnaga
principal investigator
Cairo University