Vertical Gingival Display Changes Associated With Upper Premolars Extraction Orthodontic Treatment in Gummy Smile Patients: A Prospective Clinical Trial
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 76
- 试验地点
- 1
- 主要终点
- The amount of pre- and post-treatment vertical gingival display in static and dynamic positions.
研究概览
简要总结
To investigate and compare vertical gingival display (VGD) changes associated with upper premolars extraction during orthodontic treatment.
详细描述
Seventy-six subjects who met the inclusion criteria were divided into one of 3 groups according to their treatment modalities as follows: group 1: upper first premolars extraction (24 patients, aged 21.56±3.19 years); group 2: upper second premolars extraction (26 patients, aged 22.16±3.59 years) and group 3: no orthodontic intervention was performed (happy with their teeth) (26 subjects, aged 20.45±3.29 years).
Initial records (radiographs, study casts and clinical photographs) were taken for all subjects. The same records were taken post treatment for treated subjects only. The Pre- and post- treatment VGD and lip length in static and dynamic positions and the amount of upper teeth retractions were recorded.
The paired t-test and ANOVA test were used to detect treatment changes and differences between studied groups, respectively. Factors affecting VGD were investigated using backward stepwise linear regression analysis.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- Single (Outcomes Assessor)
盲法说明
Study casts and cephalometric analysis were performed by different person (D. T.) who did not know to which group the patient belongs. Records were given numbers.
入排标准
- 年龄范围
- 17 Years 至 28 Years（Child, Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •age 17 years or more
- •skeletal class I or class II malocclusion
- •upper premolars extraction treatment plan
- •high smile line 2mm or more
- •no previous orthodontic treatment.
排除标准
- •poor oral hygiene
- •lower arch extraction treatment plan
- •Any systemic or periodiontal disease.
结局指标
主要结局
The amount of pre- and post-treatment vertical gingival display in static and dynamic positions.
时间窗: 2 years
Measured from the lower edge of the upper lip to the gingival margins of the incisors in mm.
Pre- and post treatment Nose-U-lip-length
时间窗: 2 years
Measured from the soft tissue subnasale to the upper lip stomion (base of the nose to the lip edge of the upper lip) in mm.
Upper anterior teeth retraction
时间窗: 2 years
The amount of upper anterior teeth edges' retraction on cephalometric superimposition in mm
Upper incisors extrusion
时间窗: 2 years
The amount of upper incisors edges vertical displacement on cephalometric superimposition in mm
次要结局
- Upper molars protraction(2 years)
研究者
Elham Abu Alhaija
Professor
Jordan University of Science and Technology