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首页> 外文期刊>American Journal of Orthodontics and Dentofacial Orthopedics >Three-dimensional computed tomographic analysis of changes to the external features of the nose after surgically assisted rapid maxillary expansion and orthodontic treatment: A prospective longitudinal study
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Three-dimensional computed tomographic analysis of changes to the external features of the nose after surgically assisted rapid maxillary expansion and orthodontic treatment: A prospective longitudinal study

机译：外科辅助上颌快速扩张和正畸治疗后鼻子外部特征变化的三维计算机断层扫描分析：一项前瞻性纵向研究

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Introduction: The aim of this prospective, longitudinal study was to evaluate changes to the external shape and form of the nose after surgically assisted rapid maxillary expansion and orthodontic treatment. The changes were registered using a 3-dimensional computer tomography technique, based on superimposition on the anterior base of the skull. Methods: The subjects comprised 35 patients (mean age, 19.7 years; range, 16.1-43.9 years). Low-dose, helical computerized tomography images were taken at treatment start and after orthodontic treatment, about 18 months postsurgery. The 3-dimensional models were registered and superimposed on the anterior cranial base. Results: There were in general significant widening and overall anterior and inferior displacement of the nasal soft tissues. The changes varied in size and direction. No correlation was found between the initial and final widths of the nose, or between the initial and final widths of the nostrils. Conclusions: After surgically assisted rapid maxillary expansion, the most obvious changes to the external features of the nose were at the most lateral alar bases. The difference in lateral displacement profoundly influenced the perception of a more rounded nose. Patients with narrow and constrained nostrils can benefit from these changes. The 3-dimensional superimposition applied in this study is a reliable method, circumventing projection and measurement errors.
机译：简介：这项前瞻性，纵向研究的目的是评估通过外科手术辅助的快速上颌骨扩张和正畸治疗后鼻子外部形状和形态的变化。基于叠加在头骨前基底上的3维计算机断层扫描技术记录了这些变化。方法：受试者包括35例患者（平均年龄19.7岁;范围16.1-43.9岁）。在治疗开始后和正畸治疗后（约术后18个月）拍摄低剂量螺旋计算机断层扫描图像。 3维模型已注册并叠加在前颅底。结果：鼻部软组织总体上明显变宽，整体前，下移位。变化的大小和方向各不相同。在鼻子的初始和最终宽度之间，或在鼻孔的初始和最终宽度之间，没有发现相关性。结论：手术辅助的上颌快速扩张后，鼻子外部特征最明显的变化是在最多的外侧翼基部。横向位移的差异深刻影响了鼻子更圆滑的感觉。鼻孔狭窄和受限的患者可以从这些变化中受益。本研究中使用的3维叠加是一种可靠的方法，可以避免投影和测量误差。

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