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首页> 外文期刊>IJIDeM: International Journal on Interactive Design and Manufacturing >Computer aided modelling to simulate the biomechanical behaviour of customised orthodontic removable appliances
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Computer aided modelling to simulate the biomechanical behaviour of customised orthodontic removable appliances

机译：计算机辅助建模，可模拟定制的正畸可移动器械的生物力学行为

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摘要

In the field of orthodontics, the use of Removable Thermoplastic Appliances (RTAs) to treat moderate malocclusion problems is progressively replacing traditional fixed brackets. Generally, these orthodontic devices are designed on the basis of individual anatomies and customised requirements. However, many elements may affect the effectiveness of a RTA-based therapy: accuracies of anatomical reference models, clinical treatment strategies, shape features and mechanical properties of the appliances. In this paper, a numerical model for customised orthodontic treatments planning is proposed by means of the finite element method. The model integrates individual patient's teeth, periodontal ligaments, bone tissue with structural and geometrical attributes of the appliances. The anatomical tissues are reconstructed by a multi-modality imaging technique, which combines 3D data obtained by an optical scanner (visible tissues) and a computerised tomography system (internal tissues). The mechanical interactions between anatomical shapes and appliance models are simulated through finite element analyses. The numerical approach allows a dental technician to predict how the RTA attributes affect tooth movements. In this work, treatments considering rotation movements for a maxillary incisor and a maxillary canine have been analysed by using multi-tooth models.
机译：在正畸领域，使用可移动的热塑性矫治器（RTA）来治疗中度咬合不正的问题正在逐步取代传统的固定支架。通常，这些正畸装置是基于个体解剖学和定制要求而设计的。但是，许多因素可能会影响基于RTA的治疗的有效性：解剖参考模型，临床治疗策略，矫治器的形状特征和机械性能的准确性。本文通过有限元方法提出了一种定制化正畸治疗计划的数值模型。该模型将单个患者的牙齿，牙周膜，骨组织与矫治器的结构和几何属性整合在一起。解剖组织是通过多模态成像技术重建的，该技术结合了由光学扫描仪（可见组织）和计算机断层扫描系统（内部组织）获得的3D数据。解剖形状和矫治器模型之间的机械相互作用是通过有限元分析来模拟的。数值方法使牙科技术人员能够预测RTA属性如何影响牙齿移动。在这项工作中，已经通过使用多齿模型分析了考虑上颌切牙和上颌犬牙旋转运动的治疗方法。

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