上颌骨骨锚定牵引相关上颌骨变化的三维评估。
Three-dimensional assessment of maxillary changes associated with bone anchored maxillary protraction.
机构信息
Department of Orthodontics, School of Dentistry, University of North Carolina, Chapel Hill, NC 27599-7450, USA.
出版信息
Am J Orthod Dentofacial Orthop. 2011 Dec;140(6):790-8. doi: 10.1016/j.ajodo.2011.04.025.
INTRODUCTION
Bone-anchored maxillary protraction has been shown to be an effective treatment modality for the correction of Class III malocclusions. The purpose of this study was to evaluate 3-dimensional changes in the maxilla, the surrounding hard and soft tissues, and the circummaxillary sutures after bone-anchored maxillary protraction treatment.
METHODS
Twenty-five consecutive skeletal Class III patients between the ages of 9 and 13 years (mean, 11.10 ± 1.1 years) were treated with Class III intermaxillary elastics and bilateral miniplates (2 in the infrazygomatic crests of the maxilla and 2 in the anterior mandible). Cone-beam computed tomographs were taken before initial loading and 1 year out. Three-dimensional models were generated from the tomographs, registered on the anterior cranial base, superimposed, and analyzed by using color maps.
RESULTS
The maxilla showed a mean forward displacement of 3.7 mm, and the zygomas and the maxillary incisors came forward 3.7 and 4.3 mm, respectively.
CONCLUSIONS
This treatment approach produced significant orthopedic changes in the maxilla and the zygomas in growing Class III patients.
简介
骨锚定上颌骨前牵引已被证明是治疗 III 类错颌畸形的有效方法。本研究旨在评估骨锚定上颌骨前牵引治疗后上颌骨、周围硬组织和颅周缝的三维变化。
方法
25 例连续的骨骼 III 类患者，年龄在 9 至 13 岁之间（平均年龄 11.10 ± 1.1 岁），使用 III 类颌间弹性体和双侧微型板治疗（上颌骨的颧下嵴 2 个，下颌骨的前牙 2 个）。在初始加载前和 1 年后拍摄锥形束计算机断层扫描。从断层扫描中生成三维模型，在前颅底上进行注册，叠加并通过彩色图谱进行分析。
结果
上颌骨平均向前移位 3.7 毫米，颧骨和上颌切牙分别向前移动 3.7 毫米和 4.3 毫米。
结论
这种治疗方法在生长中的 III 类患者中对上颌骨和颧骨产生了显著的矫形变化。
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