Short-term Soft and Hard Tissue Changes Following Skeletal Anterior Open Bite Treatment Using the Rapid Molar Intruder
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 40
- 试验地点
- 1
- 主要终点
- Change in the SN-OCP angle
研究概览
简要总结
This study evaluated the efficacy of rapid molar intruder (RMI) in treating anterior open bite in the mixed dentition. The study sample consisted of 40 patients who had a skeletal anterior open bite. The sample was allocated randomly into two groups: the RMI group and the control group. The skeletal, dentoalveolar and soft tissue changes occurring after treatment were assessed by using lateral cephalometric images.
详细描述
Many appliances have been used to treat skeletal anterior open bite (AOB) malocclusion, such as removable appliances, extra-oral appliances (vertical chin cup and vertical head gear), fixed appliances, Orthognathic surgery and functional appliances. Treatment with these appliances produces soft and hard dentofacial tissue changes. Many studies have been carried out in order to study these changes.
In this study, the investigators treated AOB using RMI. Patients were divided into two groups to evaluate the efficacy of RMI.
RMI group: Rapid molar intruder was applied. Control group: Untreated control group. In order to evaluate the changes occurring, lateral cephalometric images were taken in both groups at the beginning of the treatment (T1) and after 9 months of the first cephalograms (T2).
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 12 Years（Child）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Patients in the mixed dentition
- •Chronological age between 8 and 12 years
- •skeletal class I or II malocclusion
- •Skeletal anterior open bite was assessed clinically and then confirmed radiographically: SN/GoMe was greater than 33°, MM was greater than 27
- •No general problems
- •Good oral health
排除标准
- •Presence of periodontal diseases
- •Presence of general diseases, syndromes or cleft lip and palate
- •Patients with previous orthodontic treatment
结局指标
主要结局
Change in the SN-OCP angle
时间窗: Time 1: One week before the beginning of the treatment, Time 2: after nine months from the beginning of active treatment.
Lateral cephalometric images were taken for each patient, and this angle was measured in degrees. This angle represents the relationship between the occlusion plane and the cranial base in the cephalometric analysis in the vertical direction.
Change in the anterior facial height (N-Me)
时间窗: Time 1: One week before the beginning of the treatment, Time 2: after nine months from the beginning of active treatment.
Lateral cephalometric images were taken for each patient. This was measured in millimetres vertically from N point to Me point.
Change in the SNB angle.
时间窗: Time 1: One week before the beginning of the treatment, Time 2: after nine months from the beginning of active treatment.
Lateral cephalometric images were taken for each patient, and this angle was measured in degrees. This angle represents the position of the lower jaw in the cephalometric analysis in the anteroposterior direction.
Change in the MM angle
时间窗: Time 1: One week before the beginning of the treatment, Time 2: after nine months from the beginning of active treatment.
Lateral cephalometric images were taken for each patient, and this angle was measured in degrees. This angle represents the amount of vertical divergence between the upper and lower jaws in the cephalometric analysis.
Change in the SN-MP angle
时间窗: Time 1: One week before the beginning of the treatment, Time 2: after nine months from the beginning of active treatment.
Lateral cephalometric images were taken for each patient, and this angle was measured in degrees. This angle represents the relationship between the lower jaw plane and the cranial base in the cephalometric analysis in the vertical direction.
Change in the NS-GN angle
时间窗: Time 1: One week before the beginning of the treatment, Time 2: after nine months from the beginning of active treatment.
Lateral cephalometric images were taken for each patient, and this angle was measured in degrees. This angle represents the growth pattern of the mandible in the cephalometric analysis in the vertical direction.
Change in the ANB angle
时间窗: Time 1: One week before the beginning of the treatment, Time 2: after nine months from the beginning of active treatment.
Lateral cephalometric images were taken for each patient, and this angle was measured in degrees. This angle represents the spatial relationship between the upper and lower jaws in the cephalometric analysis in the anteroposterior direction.
Change in the overbite (Ovb)
时间窗: Time 1: One week before the beginning of the treatment, Time 2: after nine months from the beginning of active treatment.
Lateral cephalometric images were taken for each patient. This was measured in millimetres vertically from the upper to the lower central incisors.
Change in the SNA angle
时间窗: Time 1: One week before the beginning of the treatment, Time 2: after nine months from the beginning of active treatment.
Lateral cephalometric images were taken for each patient, and this angle was measured in degrees. This angle represents the position of the upper jaw in the cephalometric analysis in the anteroposterior direction.
Change in the Bjork sum (NS-Ar + S-Ar-Go +Ar-Go-Me)
时间窗: Time 1: One week before the beginning of the treatment, Time 2: after nine months from the beginning of active treatment.
Lateral cephalometric images were taken for each patient, and this angle was measured in degrees.
Change in the UI- LI angle
时间窗: Time 1: One week before the beginning of the treatment, Time 2: after nine months from the beginning of active treatment.
Lateral cephalometric images were taken for each patient, and this angle was measured in degrees. This angle represents the relationship between the upper and the lower incisor axis in the cephalometric analysis in the anteroposterior direction.
Change in the posterior facial height (S-Go)
时间窗: Time 1: One week before the beginning of the treatment, Time 2: after nine months from the beginning of active treatment.
Lateral cephalometric images were taken for each patient. This was measured in millimetres vertically from S point to GO point.
Change in the U1-Palatal plane measurement
时间窗: Time 1: One week before the beginning of the treatment, Time 2: after nine months from the beginning of active treatment.
Lateral cephalometric images were taken for each patient. This was measured in millimetres vertically from the upper central incisor apex and the palatal plane.
Change in the U6-Palatal plane measurement
时间窗: Time 1: One week before the beginning of the treatment, Time 2: after nine months from the beginning of active treatment.
Lateral cephalometric images were taken for each patient. This was measured in millimetres vertically from the tip of the mesial cusp of the upper first molar and the palatal plane.
Change in the overjet (Ovj)
时间窗: Time 1: One week before the beginning of the treatment, Time 2: after nine months from the beginning of active treatment.
Lateral cephalometric images were taken for each patient. This was measured in millimetres Horizontally from the upper to the lower central incisors.
Change in the SN-SPP angle
时间窗: Time 1: One week before the beginning of the treatment, Time 2: after nine months from the beginning of active treatment.
Lateral cephalometric images were taken for each patient, and this angle was measured in degrees. This angle represents the relationship between the upper jaw plane and the cranial base in the cephalometric analysis in the vertical direction.
Change in the L1-GoMe measurement
时间窗: Time 1: One week before the beginning of the treatment, Time 2: after nine months from the beginning of active treatment.
Lateral cephalometric images were taken for each patient. This was measured in millimetres vertically from the lower central incisor apex and the mandibular plane.
Change in the L6-GoMe measurement
时间窗: Time 1: One week before the beginning of the treatment, Time 2: after nine months from the beginning of active treatment.
Lateral cephalometric images were taken for each patient. This was measured in millimetres vertically from the tip of the mesial cusp of the lower first molar and the mandibular plane.
次要结局
- Change in the Li-Esth measurement(Time 1: One week before the beginning of the treatment, Time 2: after nine months from the beginning of active treatment.)
- Change in the Nasolabial angle(Time 1: One week before the beginning of the treatment, Time 2: after nine months from the beginning of active treatment.)
- Change in the Ls-Esth measurement(Time 1: One week before the beginning of the treatment, Time 2: after nine months from the beginning of active treatment.)
- Change in the Mentolabial angle(Time 1: One week before the beginning of the treatment, Time 2: after nine months from the beginning of active treatment.)