Associations Between Radiographic Inclination of Premolars and Maxillary Expansion: Retrospective Observational Study
试验速览
- 阶段
- 不适用
- 状态
- Enrolling By Invitation
- 入组人数
- 200
- 试验地点
- 1
- 主要终点
- Number of required activation for maxillary expansion
研究概览
简要总结
Recruitment of patients treated using rapid maxillary expanders with dental anchorage, with pre-treatment panoramic X-rays and post-treatment models. In the initial phase of the study, the objective is to correlate the radiographic inclination of the upper permanent premolars in the pre-treatment orthopantomography to the expansion obtained at the end of therapy using a palatal expander with dental anchorage.
详细描述
Maxillary transverse deficiency is a common malocclusion, frequently associated with unilateral or bilateral posterior crossbite, with a prevalence ranging from 8% to 22%. Since transverse development occurs earlier than vertical and sagittal development, inadequate transverse growth can also affect overall craniofacial development. This deficiency can impact aesthetics and functions such as creating excessive buccal corridor spaces, causing dental crowding, and reducing nasal cavity volume, which can lead to breathing difficulties. Thus, timely correction of maxillary transverse deficiency is crucial for harmonizing the relationship between the upper and lower jaws, as well as for enhancing aesthetics and functionality. Currently, rapid maxillary expansion (RME) is a widely accepted and established treatment for correcting maxillary constriction in patients during their peak growth period.
There is no protocol in the literature that investigates the need for transverse expansion of the upper jaw through the analysis of the inclination of the long axis of the upper premolars and canines. Therefore, the aim of this study is to investigate the predictability of the necessary expansion through the analysis of the inclination of the upper premolars and canines in orthopantomography.
In this retrospective study, patients who are scheduled for treatment using rapid palatal expanders with dental anchorage will be recruited. A requirement for recruitment will be the presence of pre-treatment orthopantomography.
The inclination of the tooth will be calculated between the long axis of the tooth and the middle line as previously described by Baccetti et all. In their works regarding impacted canines.
The achieved expansion will be evaluated based on the number of activations recorded in each individual patient's chart clinical records.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Retrospective
入排标准
- 年龄范围
- 6 Years 至 14 Years（Child）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Patients scheduled for orthopedic treatment with rapid palatal expander
- •Pre-treatment orthopantomography
- •Pre and post treatment intraoral scan
排除标准
- •Previous maxillofacial surgery
- •cleft lip and palate
- •premolar agenesis or extraction for fracture ecc.
- •Previous orthopedic-orthodontic treatments
结局指标
主要结局
Number of required activation for maxillary expansion
时间窗: T0 (pre-treatment casts/x-rays) and T1 (post-treatment casts/x-rays)
Correlation between the number of activations of the rapid palatal expander and premolar inclination (angle between the long axis of the premolars with the occlusal plane)
次要结局
- Canine inclination(T0 (pre-treatment x-rays) and T1 (post-treatment x-rays))
研究者
Andrea Scribante
Associate Professor, Principal Investigator
University of Pavia