本文選題：股骨 + Mimics�。� 參考：《太原理工大學(xué)》2014年碩士論文

【摘要】：股骨是人體最長的骨,在人體運(yùn)動(dòng)系統(tǒng)中主要起支撐作用,上段股骨頭是構(gòu)成髖關(guān)節(jié)的一部分,下段股骨內(nèi)、外側(cè)髁是構(gòu)成膝關(guān)節(jié)的一部分,解剖結(jié)構(gòu)分為骨皮質(zhì)和骨松質(zhì)。股骨受損和壞死困擾著大多數(shù)股骨患者,傳統(tǒng)的假體置換手術(shù)在臨床上存在很多不足,諸如排異反應(yīng)、假體掉落和個(gè)體差異性。隨著有限元法廣泛應(yīng)用于生物醫(yī)學(xué)工程領(lǐng)域,個(gè)性化股骨置換手術(shù)在骨缺損的研究中是個(gè)很熱的話題。本文使用計(jì)算機(jī)進(jìn)行了股骨三維重建、有限元建模及分析。本文所建模型能有效地分析股骨的力學(xué)特性,為下一步定制個(gè)性化人工髖關(guān)節(jié)奠定基礎(chǔ)。 本文選取新鮮豬股骨上的三個(gè)點(diǎn)貼應(yīng)變片,在材料實(shí)驗(yàn)性能機(jī)INSTRON5544進(jìn)行單軸壓縮實(shí)驗(yàn),獲得三個(gè)位置的實(shí)驗(yàn)應(yīng)變值；實(shí)驗(yàn)前對其行CT掃描,獲得DICOM格式文件并刻入光盤,其后導(dǎo)入Mimics10.01試用版中進(jìn)行三維重建,用Ansys12.0試用版體網(wǎng)格劃分,由于骨材質(zhì)分布呈非均勻性特性,再導(dǎo)入Mimics10.01賦材料屬性,最后導(dǎo)入Ansys12.0進(jìn)行有限元計(jì)算,獲得對應(yīng)位置的模擬應(yīng)變值,通過與實(shí)驗(yàn)數(shù)據(jù)對比吻合,說明本文有限元建模的方法可信。 然后采用同樣的方法進(jìn)行人體股骨有限元建模,該模型符合真實(shí)情況,并能夠模擬正常人體站立時(shí),在不同載荷情況下股骨的von Mises應(yīng)力。研究結(jié)果表明用灰度值與材料屬性關(guān)系所建立的人體股骨有限元模型能模擬真實(shí)情況,可用于股骨治療的臨床模擬。
[Abstract]:The femur is the longest bone in the human body and plays a supporting role in the human motor system. The upper femoral head is a part of the hip joint, the lower femur, the lateral condyle is a part of the knee joint, and the anatomical structure is divided into bone cortex and cancellous bone. The damage and necrosis of the femur have troubled most of the femur patients. The traditional prosthesis replacement surgery has many shortcomings in clinic, such as rejection reaction, prosthesis fall and individual difference. With the wide application of finite element method in biomedical engineering, personalized femoral replacement is a hot topic in bone defect research. In this paper, three-dimensional reconstruction, finite element modeling and analysis of femur are carried out by computer. The model can effectively analyze the mechanical properties of femur and lay a foundation for customization of artificial hip joint. In this paper, three strain gauges of fresh pig femur were used to carry out uniaxial compression experiment on material performance machine INSTRON5544, and the experimental strain values of three positions were obtained. Before the experiment, CT scan was performed, DICOM format file was obtained, and the disc was engraved in DICOM format. Then it was imported into Mimics 10.01 trial edition for 3D reconstruction, and the Ansys12.0 trial version was used to mesh the body. Due to the uneven distribution of bone material, Mimics10.01 was imported into Mimics10.01 to assign material properties. Finally, Ansys12.0 was imported to calculate the finite element. The simulated strain values of the corresponding position are obtained, and the results are in good agreement with the experimental data, which shows that the finite element modeling method in this paper is reliable. Then the finite element model of human femur is established by the same method. The model accords with the real situation and can simulate the von stress of the femur under different loads when the normal human body is standing. The results show that the finite element model of human femur based on the relationship between gray value and material properties can simulate the real situation and can be used in the clinical simulation of femur therapy.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：R681.8

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本文編號：2014213