Treatment Effects of Herbst Appliance in Skeletal Class II Cases During Prepubertal and Postpubertal Periods: A Cone Beam Computed Tomographic Study
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 36
- 试验地点
- 1
- 主要终点
- Skeletal and dental changes
研究概览
简要总结
The study was directed to compare the treatment outcomes of subjects with Class II malocclusion who were treated with Herbst appliance before and after puberty.
详细描述
Thirty-six Class II patients were randomly selected and divided into two groups based on their stage of skeletal maturation: pre-pubertal group (18 patients, mean age 9.15± 1.5 years) and post-pubertal group (18 patients, mean age 16.3 ± 1.0 years). All patients were treated with metallic splint supported Herbst IV appliance.
Pretreatment and post-Herbst IV treatment cone beam CT(CBCT) scans were obtained for both groups. Dentoskeletal and TMJ measurements made on the CBCT scans were analysed.
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
- 8 Years 至 17 Years（Child）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Skeletal Class II malocclusion with retrognathic mandible (ANB >5°, SNB<76°)
- •Normal growth pattern (SN/MP angle was in 25°- 35° range)
- •Unilateral or bilateral Class II molar relationship greater than or equal to one-half a cusp width.
- •Minimal or no crowding in the mandibular arch (0-5mm).
- •Average inclination or slight retroclination of the lower incisor.
- •An overjet greater than 5 mm.
排除标准
- •Skletal Class I
- •Craniofacial syndrome.
结局指标
主要结局
Skeletal and dental changes
时间窗: 8 months
The DICOM (Digital Imaging and Communications in Medicine) files from the pre and post CBCT scans were imported to Mimics software (Version 10.1, Materialise NV, Leuven, Belgium); and the cephalometric landmarks and planes were defined . Linear sagittal measurements of point A, point B, glenoid fossa, upper incisor, lower incisor, upper molars, and lower molars were recorded in relation to orbital perpendicular plane.
次要结局
- Condylar head position(8 months)
研究者
khaled farouk
lecturer
Al-Azhar University