Simulation of orthodontic tooth movements. A comparison of numerical models.
Simulation of orthodontic tooth movements. A comparison of numerical models.
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DOI：
10.1007/bf01298963
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发表时间：
1999-01-01
期刊：
影响因子：
--
通讯作者：
Jager, A
中科院分区：
文献类型：
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作者：
Bourauel, C;Freudenreich, D;Jager, A
正畸牙齿移动的基础是骨对机械应力的反应能力与牙槽骨的并置和吸收。目前，潜在的生物物理，生物化学和细胞过程是许多研究的主题。然而，目前，正畸牙齿移动的分析描述，包括所涉及的过程的所有组成部分似乎是不可能的。本研究的目的是建立一个能够描述牙槽骨改建的基于力学的现象学模型。因此，开发了两种不同的模型。首先是基于这样的假设，即牙周膜（PDL）的变形是启动正畸牙齿移动的关键刺激。第二种观点认为牙槽骨的变形是正畸骨改建的基础。这两个模型被集成到一个有限元软件包中，计算牙齿和牙齿支撑结构的应力、应变和变形，并由此模拟牙齿及其牙槽通过骨骼的运动。精确测量了5例患者的临床诱导犬齿回缩以及力系统，并使用两种模型模拟了牙齿移动。结果表明，第一个模型允许可靠的模拟正畸牙齿移动，而第二个是被拒绝。
Orthodontic tooth movements are based on the ability of bone to react to mechanical stresses with the apposition and resorption of alveolar bone. Currently, the underlying biophysical, biochemical, and cellular processes are the subject of numerous studies. At present, however, an analytical description of orthodontic tooth movements including all components of the processes involved seems to be impossible. It was the aim of the present study to develop a mechanics-based phenomenological model capable of describing the alveolar bone remodeling. Thus, 2 different models were developed. The first is based on the assumption that deformations of the periodontal ligament (PDL) are the key stimulus to starting orthodontic tooth movement. The second supposes that deformations of the alveolar bone are the basis of orthodontic bone remodeling. Both models were integrated into a finite element package calculating stresses, strains and deformations of tooth and tooth supporting structures and from this simulating the movement of the tooth and its alveolus through the bone. Clinically induced canine retractions in 5 patients as well as force systems were exactly measured and the tooth movements were simulated using both models. The results show that the first model allows reliable simulation of orthodontic tooth movements, whereas the second is to be rejected.