Study the Effect of Upper Expansion Appliances on Lower Jaw Forward Projection/Growth
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 60
- 试验地点
- 1
- 主要终点
- Lower jaw projection
研究概览
简要总结
Young children with backward positioned lower jaw/chin will be recruited to have an upper jaw expansion appliance. Previous research showed that the use of similar appliances can lead to lower jaw forward growth. 60 young children aged 9-11 will be recruited to have either active or non-active Wilson type upper arch expansion appliance. Patients will have special x-ray (Cone Beam computed tomography) before and after treatment (after 9 months) of starting the treatment. After participation, routine orthodontic treatment will be continued.
详细描述
Previous research showed that the use of upper jaw expansion appliances can lead to lower jaw forward growth (1). 60 young children aged 9-11 with backward positioned lower jaw/chin will be recruited to have either active or non-active Wilson type upper arch expansion appliance. Patients will have special x-ray (Cone Beam computed tomography) before and after treatment (after 9 months) of starting the treatment. After participation, routine orthodontic treatment will be continued.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Single Group
- 主要目的
- Treatment
- 盲法
- Double (Participant, Outcomes Assessor)
入排标准
- 年龄范围
- 9 Years 至 11 Years（Child）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Class II skeletal due to lower jaw backward projection
- •Class II malocclusion
- •Early mixed dentition (all first permanent molars erupted, as well as all erupting upper and lower permanent incisors)
排除标准
- •Other orthodontic treatment provided
- •Growth problems (craniofacial syndromes, etc.)
研究组 & 干预措施
Active upper Wilson appliance
Active upper arch Wilson quadhelex appliance
干预措施: Upper arch Wilson quadhelex appliance (Device)
Non active upper expansion appliance
Non-Active upper arch Wilson quadhelex appliance
干预措施: Upper arch Wilson quadhelex appliance (Device)
结局指标
主要结局
Lower jaw projection
时间窗: 9 months
Lower jaw projection will be evaluated by computed tomography.
Lower jaw size
时间窗: 9 months
Lower jaw size will be evaluated by computed tomography.
次要结局
- Base of skull bone position(9 months)
- Jaw joint size(9 months)
- Jaw joint position(9 months)
- Base of skull bone size(9 months)