Assessment of Root Parallelism Following Orthodontic Treatment in Adolescent vs Adult Patients Treated With Maxillary First Premolar Extraction: Observational -Analytical Study
试验速览
- 阶段
- 不适用
- 入组人数
- 180
- 主要终点
- Frequency of Good Root Parallelism
研究概览
简要总结
Panoramic radiographs of finished orthodontic cases will be collected after fulfilling the inclusion and exclusion criteria. Then the collected data will be divided into two groups according to age either adolescent (12-18 years old) or adult group (after 18 years old).
in the panoramic views the long axes of canines and second premolar will be traced digitally using Digital softwares (microDicom vierwer Simeo Antonov Stoykov 0.7.7) & (IC Measure 2.0.0.161).
The objective of this study is to assess the root parallelism between maxillary canines and second premolars in adolescents versus adults group of patients requiring maxillary first premolar extraction during the orthodontic treatment.
研究设计
- 研究类型
- Observational
- 观察模型
- Other
- 时间视角
- Retrospective
入排标准
- 年龄范围
- 12 Years 至 —（Child, Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Adults group of Patients (above 18 years old). .
- •Adolescent group of patients (from 12 to 18 years old).
- •Extraction of permanent maxillary first premolar in at least one quadrant.
- •Same head position at scanning time.
- •Same machine: Orthopantomograph Planmeca Promax 2P (Planmeca USA) with a kilovoltage of 55 to 85 and an exposure time of 15 seconds at a focal distance of 46 cm.
- •Same type of bracket (Roth prescription, slot size #22).
- •Full set of teeth (not necessarily including third molars)
排除标准
- •Systematic diseases.
- •non extraction cases.
- •severe divergence or convergence between roots of maxillary canine and second premolar.
结局指标
主要结局
Frequency of Good Root Parallelism
时间窗: 8 months
root paralellism between canine and second premolar
次要结局
未报告次要终点
研究者
Mina adly kaldas
principal investigator
Cairo University