Evaluation of Profile Changes and Torque Control in Dental Bimaxillary Proclination Cases Using Lingual Lever Arm Mechanics vs Conventional Lingual Orthodontic Mechanics A Randomized Controlled Trial
试验速览
- 阶段
- 不适用
- 入组人数
- 24
- 主要终点
- Nasolabial angle
研究概览
简要总结
This study evaluates the profile changes and torque control using lingual lever arm vs conventional lingual mechanics. Half of the patients will receive lever arms and the other half will receive conventional lingual orthodontics.
详细描述
Conventional lingual orthodontic biomechanics leads to torque loss during en masse retraction of the anterior segment in the bimaxillary proclination cases treated by first premolar extraction. Torque loss affects the final outcome of the treatment negatively.
Adding a lever arm to the lingual wire will transmit the point of force application at or apical to the center of rotation which will reduce or eliminate toqrue loss during anterior segment 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
- 18 Years 至 30 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Male or female adult patients with age range 18-30 yrs old.
- •Class I bimaxillary dentoalveolar proclination.
- •Full permanent dentition.
- •Good oral hygiene.
- •Maximum anchorage is required.
- •Healthy bone around the first molars is needed.
排除标准
- •.Systemic disease.
- •Severe crowding.
- •Extracted or missing upper permanent tooth/teeth (except for third molars).
- •Signs, symptoms or previous history of temporomandibular disorders (TMD).
- •Previous orthodontic treatment.
研究组 & 干预措施
Conventional lingual mechanics
干预措施: Lingual orthodontics (Procedure)
Lever arm lingual mechanics
干预措施: Lingual orthodontics (Procedure)
结局指标
主要结局
Nasolabial angle
时间窗: 12 months
Soft tissue lateral cephalometric radiograph measurement
Profile convexity reduction
时间窗: 12 months
N'-sn -Pog' soft tissue angle
次要结局
- Torque control(12 months)
研究者
Ahmed Kandil
Assistant Lecturer
Cairo University