Microimplant-assisted Rapid Palatal Expansion Appliance to Orthopedically Correct Midface Deficiency in Patients With Cleft Lip and Palate: a Randomized Clinical Trial
试验速览
- 阶段
- 不适用
- 发起方
- 入组人数
- 44
- 试验地点
- 2
- 主要终点
- The primary outcome will be the degree of anterior movement of the maxilla after treatment).
研究概览
简要总结
The objective of this randomized controlled study will be to evaluate the dental and skeletal effects of maxillary protraction with a facemask, associated with MARPE and Class III elastics in patients with unilateral cleft lip and palate (CLP) with maxillary retrusion, compared to HYRAX type maxillary expanders. The investigators will examine differences in treatment times, along with skeletal, dental and soft tissue changes.
详细描述
The CONSORT statement will be used as a guide for this study. This work will be a parallel group study, randomized, with active control, with an allocation ratio of 1: 1.
This study was submitted to the Research Ethics Committee of the Pontifical Catholic University of Minas Gerais. Participants will be recruited in the Master's Degree in Orthodontics at PUC Minas, based on inclusion criteria.
Interventions:
Palatal expanders of the HYRAX type, with bands on the first permanent molars or second deciduous molars will be used for patients in both groups. The hooks for the use of Class III elastics will be welded on the vestibular of the upper molar bands. In the experimental group, the expander will be anchored mesially and bilaterally in mini-implants, in a technique known as rapid maxillary expansion assisted by mini-implants (MARPE). The control group will be active, with conventional dento-mucus-supported HYRAX expanders. All expanders will be manufactured by the same orthodontic technician.
Both groups will be treated with maxillary protraction with a Petit-type face mask at night (12 hours a day). The direction of the elastics for the maxillary traction force will be between 15˚ to 30˚ below the occlusal plane, providing a force between 400 and 500 g per side. During the day (12 hours a day), patients will use a lower expansion plate with an occlusal stop, which will be activated once a week (0.25 mm), with hooks in the region of the lower canines for the use of Class III elastics. size 3/16 "(150g). The time-frame of the experiment will be 6 months.
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
- 6 Years 至 13 Years（Child）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Patients with cleft lip and palate;
- •6 to 13 years before orthodontic treatment, with sagittal deficiency of the facial middle third;
- •Angle Class III malocclusion, or mesial step of the deciduous second molars, and anterior crossbite;
- •ANB less than 0˚, Wits less than -2 mm and the distance from point A to the perpendicular nasion less than 0 mm.
排除标准
- •Previous orthodontic treatment;
- •Other craniofacial anomalies;
- •Inadequate maxillary denture for placement of a expander.
结局指标
主要结局
The primary outcome will be the degree of anterior movement of the maxilla after treatment).
时间窗: 6 months
Cone beam computed tomography (CBCT) will be performed at the beginning and at the end of the treatment. Three-dimensional virtual models, built from the CBCT's scans, will allow to measure the changes between T0 and T1. The processing of the TCFC and virtual models will be done using the ITK-SNAP 2.2 software (free software, www.itksnap.org), SLICER CMF 4.0 (free software, www.slicer.org).
次要结局
- Secondary outcomes will be changes in other cephalometric variables and treatment time.(6 months)
研究者
Ildeu Andrade Jr.
Principal Investigator
Pontifícia Universidade Católica de Minas Gerais