Biomechanics of the Deformity of Septal L-Struts
Biomechanics of the Deformity of Septal L-Struts
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DOI：
10.1002/lary.20976
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发表时间：
2010-08-01
期刊：
影响因子：
2.6
通讯作者：
Lee, Heow Pueh
中科院分区：
文献类型：
--
作者：
Lee, Shu Jin;Liong, Kyrin;Lee, Heow Pueh
目的/假设：在鼻中隔成形术中，通常保留或创建鼻中隔L形支柱。其主要目的是提供结构稳定性并拉直鼻中隔。L形支柱的畸形或过度变形可能导致功能或美观并发症。目的是研究材料特性、边界条件、鼻尖支撑和L形支柱的几何形状对鼻中隔L形支柱畸形的影响。研究设计：计算机辅助建模用于创建弹簧支撑的鼻尖和自由鼻尖L形支柱鼻中隔软骨模型，在此模型上进行模拟以分析变形模式。首先从人类受试者的计算机断层扫描创建五面隔膜模型。然后从该隔膜模型构建具有更宽或更窄的背侧支柱以及软骨弧的各种组合的几个模型。假设与骨支撑连接的边缘是固定的，假设鼻尖是弹簧支撑的。进行有限元分析，以确定不同的材料特性和鼻尖弹簧support.Results的组合中的鼻中隔支柱的变形和应力分布：弹簧支持的鼻尖模型提供了一个更准确的表示在鼻子的边界条件。在自由和弹簧支撑的鼻尖中，无论材料特性如何，BC连接处和鼻棘都是最大应力的一致点。保留弧的软骨和更广泛的背支柱增加了稳定性的structure.Conclusions：弹簧支持的鼻尖模型的引入提供了一个更准确的表示在鼻子的边界条件。骨软骨交界处和鼻棘被认为是最大应力的一致点，无论材料特性如何。保留弧形软骨和更宽的背侧支柱增加了结构的稳定性。
Objectives/Hypothesis: A septal L-strut is often preserved or created during septoplasty. The main intention is to provide structural stability and to straighten the nasal septum. Deformity or excessive deformation of the L-strut might cause functional or aesthetic complications. The objectives were to examine the effects of material properties, the boundary conditions, the nasal tip support, and the geometry of the L-struts on the deformity of septal L-struts.Study Design: Computer-aided modeling was used to create a spring-supported nasal tip and free nasal tip L strut septal cartilage models upon which simulation was performed to analyse the deformation patterns.Methods: A five-sided septum model was first created from the computed tomography scan of a human subject. Several models with various combinations of wider or narrower dorsal struts as well as arc of cartilage were then constructed from this septum model. The edges connected to bony supports were assumed to be fixed, and the nasal tip was assumed to be spring supported. Finite element analyses were carried out to determine the deformation and stress distribution in the septal strut for different combinations of material properties and nasal tip spring support.Results: The spring-supported nasal tip model provides a more accurate representation of the boundary conditions in the nose. In both the free and spring-supported nasal tips-the BC junction and the nasal spine are found to be the consistent points of maximum stress regardless of material properties. The preservation of an arc of cartilage and a wider dorsal strut increase the stability of the structure.Conclusions: The introduction of a spring-supported nasal tip model provided a more accurate representation of the boundary conditions in the nose. The bony-cartilaginous junction and the nasal spine were found to be the consistent points of maximum stress, regardless of material properties. The preservation of an arc of cartilage and a wider dorsal strut increased the stability of the structure.