DAPSQ治療前柱伴后半橫行髖臼骨折力學(xué)穩(wěn)定性的有限元分析
發(fā)布時(shí)間：2018-07-29 08:29
【摘要】：目的:利用有限元方法研究動(dòng)力化前路方形區(qū)鈦板螺釘系統(tǒng)(DAPSQ)治療前柱伴后半橫行髖臼骨折的生物力學(xué)穩(wěn)定性及合并對(duì)側(cè)恥骨上下支骨折對(duì)其生物力學(xué)穩(wěn)定性的影響,以期為臨床上應(yīng)用提供生物力學(xué)指導(dǎo)。方法:(1)選取一名健康成年男性志愿者(排除各種骨盆病變及畸形),予以知情同意,采用16排螺旋CT機(jī)對(duì)其第四腰椎至股骨上段進(jìn)行0.5mm薄層平掃,獲得全骨盆體層圖像數(shù)據(jù)并以Dicom格式保存,將數(shù)據(jù)導(dǎo)入有限元處理軟件Mimics10.01,進(jìn)行骨盆三維幾何模型重建,再利用Ansys軟件下處理網(wǎng)格的模塊軟件ICEM對(duì)骨盆三維重建模型進(jìn)行六面體網(wǎng)格劃分。再運(yùn)用Hypermesh V10.0軟件調(diào)整網(wǎng)格質(zhì)量,在此基礎(chǔ)上根據(jù)解剖結(jié)構(gòu)加載韌帶,初步建立骨盆三維六面體單元有限元模型,將數(shù)據(jù)導(dǎo)入有限元軟件ABAQUS 6.12進(jìn)行骨盆應(yīng)力計(jì)算分析。模擬坐位骨盆受力,將得到的應(yīng)力云圖與體外實(shí)驗(yàn)及其它模型文獻(xiàn)數(shù)據(jù)進(jìn)行有效性對(duì)比驗(yàn)證。(2)運(yùn)用有限元分析方法構(gòu)建右側(cè)高位前柱伴后半橫行髖臼骨折的全骨盆模型,對(duì)右側(cè)髖臼骨折分別采用DAPSQ(A),前路重建鈦板聯(lián)合后柱拉力螺釘(B),雙柱鈦板內(nèi)固定(C)固定。將建好的有限元模型導(dǎo)入ABAQUS6.12軟件,模擬坐位加載600N生理載荷,比較各組骨折端的位移及應(yīng)力分布情況,分析3種不同內(nèi)固定方式在固定前柱伴后半橫行髖臼骨折的生物力學(xué)穩(wěn)定性;(3)根據(jù)已驗(yàn)證DAPSQ固定前柱伴后半橫行髖臼骨折的穩(wěn)定的情況下,分別構(gòu)建出三組內(nèi)固定模型:對(duì)側(cè)骨盆環(huán)完整(A)、對(duì)側(cè)恥骨上下支骨折內(nèi)固定(B)及對(duì)側(cè)恥骨上下支骨折未固定(C),模擬坐位加載600N生理載荷,比較各組右側(cè)骨折端的位移及應(yīng)力分布情況,分析在3種不同情況下DAPSQ固定前柱伴后半橫行髖臼骨折的生物力學(xué)穩(wěn)定性。結(jié)果:(1)本研究建立了具有詳細(xì)解剖結(jié)構(gòu)的全骨盆三維非線性六面體有限元模型,本模型共包含有限元單元格86444個(gè),節(jié)點(diǎn)88388個(gè),經(jīng)比較,本模型所生理載荷下受到的應(yīng)力分布與體外實(shí)驗(yàn)及其它文獻(xiàn)模型數(shù)據(jù)相符合。(2)在模擬坐位加載600N生理載荷時(shí)3種內(nèi)固定模型髖臼臼頂?shù)目v向位移及后柱內(nèi)壁的橫向位移分布表現(xiàn)為CBA,坐位下A、B、C三組內(nèi)固定模型臼頂縱向位移分別為(0.959±0.216)、(0.970±0.220)、(0.978±0.223)mm,后柱內(nèi)壁橫向位移分別為(0.903±0.034)、(0.930±0.045)、(0.997±0.068)mm,三種內(nèi)固定模型所受應(yīng)力表現(xiàn)為CBA,C與A、B的差異均具有明顯統(tǒng)計(jì)學(xué)意義(P0.05)。(3)在對(duì)側(cè)骨盆環(huán)是否穩(wěn)定的3種情況下的內(nèi)固定模型中,A、B、C三組內(nèi)固定模型臼頂縱向位移差異無顯著意義;后柱內(nèi)壁橫向位移分別為(0.903±0.034)、(0.910±0.038)、(1.117±0.380)mm,DASPQ方形區(qū)處螺釘所受應(yīng)力表現(xiàn)為ABC,差異有統(tǒng)計(jì)學(xué)意義。結(jié)論:(1)本研究建立了一個(gè)具有較高仿真性的正常人體全骨盆三維非線性六面體有限元模型,該模型構(gòu)建了基本的骨盆韌帶組織,解剖結(jié)構(gòu)完整,使得模型能夠基本符合骨盆的真實(shí)情況,通過對(duì)其進(jìn)行相應(yīng)的有效性驗(yàn)證,得出該模型可用來進(jìn)行與臨床相關(guān)的生物力學(xué)研究。(2)DAPSQ治療前柱伴后半橫行髖臼骨折具有良好的生物力學(xué)穩(wěn)定性。(3)DASPQ固定前柱伴后半橫行髖臼骨折時(shí),在對(duì)側(cè)骨盆環(huán)穩(wěn)定的前提下可以提供較好的生物力學(xué)穩(wěn)定性。
[Abstract]:Objective: To study the biomechanical stability of the anterior column of titanium plate screw system (DAPSQ) in the treatment of anterior column with posterior semi transverse acetabular fracture with the finite element method and the effect of the combined upper and lower branch fracture of the pubic symphysis on its biomechanical stability in order to provide a biomechanical guidance for clinical application. Method: (1) select a healthy adult. The male volunteers (excluding the various pelvic lesions and deformities) were given informed consent. The 16 row spiral CT was used to scan the fourth lumbar vertebrae to the upper femur by 0.5mm thin layer scanning. The data of the whole pelvic body layer were obtained and stored in the Dicom format. The data were introduced into the finite element treatment Mimics10.01, and the three-dimensional geometric model of the pelvis was rebuilt. Using the module software ICEM to deal with the grid in Ansys software, the three-dimensional reconstruction model of the pelvis is divided into hexahedral mesh. Then the Hypermesh V10.0 software is used to adjust the quality of the grid. On this basis, the ligaments are loaded according to the anatomical structure, and the finite element model of the three-dimensional hexahedral element in the pelvis is preliminarily established, and the data are introduced into the finite element software ABAQUS 6.12. The pelvic stress was analyzed. The stress of the sitting pelvis was simulated, and the effectiveness of the stress cloud map was compared with the other model literature data. (2) the whole pelvis model of the right high position anterior column with the posterior half transverse acetabular fracture was constructed by the finite element analysis method, and DAPSQ (A) was used for the right acetabular fracture, and the anterior approach was used. The titanium plate combined with posterior column pull screw (B) and double column titanium plate internal fixation (C) were fixed. The established finite element model was introduced into ABAQUS6.12 software to simulate the physiological load of loading 600N at the seat position, to compare the displacement and stress distribution of the fracture ends of each group, and to analyze the biomechanical stability of 3 different internal fixation methods in the anterior column with the posterior half transverse acetabular fracture. (3) three groups of internal fixation models were constructed on the basis of the stability of DAPSQ fixed anterior column with posterior half transverse acetabular fracture: contralateral pelvic ring integrity (A), contralateral suprapubic fracture internal fixation (B) and contralateral suprapubic fracture (C), simulated sitting position loading 600N physiological load, and comparing the right fracture ends of each group. The biomechanical stability of DAPSQ fixed anterior column with posterior half transverse acetabular fracture was analyzed in 3 different cases. Results: (1) this study established a three-dimensional nonlinear hexahedral finite element model with detailed anatomical structure. This model includes 86444 finite element cells, 88388 nodes, and a comparison. The stress distribution under the physiological load of this model is in accordance with the in vitro experiment and other literature model data. (2) the longitudinal displacement of the acetabular top and the lateral displacement of the inner wall of the rear column of the 3 internal fixed models at the simulated sitting position when loading 600N physiological load are CBA, and the longitudinal displacement of the fixed model molars in the three groups of A, B and C groups under the sitting position. Not (0.959 + 0.216), (0.970 + 0.220), (0.978 + 0.223) mm, the lateral displacement of the inner wall of the post column is (0.903 + 0.034), (0.930 + 0.045), (0.997 + 0.068), and the stress in the three internal fixation models is CBA, and the difference between C and A, B has obvious statistical significance (P0.05). In the A, B, C three groups, there was no significant difference in the longitudinal displacement of the fixed model in the three groups. The lateral displacement of the inner wall of the post column was (0.903 + 0.034), (0.910 + 0.038), (1.117 + 0.380) mm, and the stress in the DASPQ square area was ABC, and the difference was statistically significant. (1) a high simulation normal human body was established in this study. The three-dimensional nonlinear hexahedron finite element model of the pelvis is used to construct the basic pelvic ligament tissue, and the anatomical structure is complete so that the model can basically conform to the true situation of the pelvis. Through the corresponding validation of the model, the model can be used to carry out the biomechanical study related to the clinical. (2) the DAPSQ column is accompanied by the post treatment. The semi transverse acetabular fracture has good biomechanical stability. (3) DASPQ fixed anterior column with posterior half transverse acetabular fracture can provide better biomechanical stability on the premise of the stability of the contralateral pelvic ring.
【學(xué)位授予單位】：湖北中醫(yī)藥大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：R687.3
本文編號(hào)：2152095
[Abstract]:Objective: To study the biomechanical stability of the anterior column of titanium plate screw system (DAPSQ) in the treatment of anterior column with posterior semi transverse acetabular fracture with the finite element method and the effect of the combined upper and lower branch fracture of the pubic symphysis on its biomechanical stability in order to provide a biomechanical guidance for clinical application. Method: (1) select a healthy adult. The male volunteers (excluding the various pelvic lesions and deformities) were given informed consent. The 16 row spiral CT was used to scan the fourth lumbar vertebrae to the upper femur by 0.5mm thin layer scanning. The data of the whole pelvic body layer were obtained and stored in the Dicom format. The data were introduced into the finite element treatment Mimics10.01, and the three-dimensional geometric model of the pelvis was rebuilt. Using the module software ICEM to deal with the grid in Ansys software, the three-dimensional reconstruction model of the pelvis is divided into hexahedral mesh. Then the Hypermesh V10.0 software is used to adjust the quality of the grid. On this basis, the ligaments are loaded according to the anatomical structure, and the finite element model of the three-dimensional hexahedral element in the pelvis is preliminarily established, and the data are introduced into the finite element software ABAQUS 6.12. The pelvic stress was analyzed. The stress of the sitting pelvis was simulated, and the effectiveness of the stress cloud map was compared with the other model literature data. (2) the whole pelvis model of the right high position anterior column with the posterior half transverse acetabular fracture was constructed by the finite element analysis method, and DAPSQ (A) was used for the right acetabular fracture, and the anterior approach was used. The titanium plate combined with posterior column pull screw (B) and double column titanium plate internal fixation (C) were fixed. The established finite element model was introduced into ABAQUS6.12 software to simulate the physiological load of loading 600N at the seat position, to compare the displacement and stress distribution of the fracture ends of each group, and to analyze the biomechanical stability of 3 different internal fixation methods in the anterior column with the posterior half transverse acetabular fracture. (3) three groups of internal fixation models were constructed on the basis of the stability of DAPSQ fixed anterior column with posterior half transverse acetabular fracture: contralateral pelvic ring integrity (A), contralateral suprapubic fracture internal fixation (B) and contralateral suprapubic fracture (C), simulated sitting position loading 600N physiological load, and comparing the right fracture ends of each group. The biomechanical stability of DAPSQ fixed anterior column with posterior half transverse acetabular fracture was analyzed in 3 different cases. Results: (1) this study established a three-dimensional nonlinear hexahedral finite element model with detailed anatomical structure. This model includes 86444 finite element cells, 88388 nodes, and a comparison. The stress distribution under the physiological load of this model is in accordance with the in vitro experiment and other literature model data. (2) the longitudinal displacement of the acetabular top and the lateral displacement of the inner wall of the rear column of the 3 internal fixed models at the simulated sitting position when loading 600N physiological load are CBA, and the longitudinal displacement of the fixed model molars in the three groups of A, B and C groups under the sitting position. Not (0.959 + 0.216), (0.970 + 0.220), (0.978 + 0.223) mm, the lateral displacement of the inner wall of the post column is (0.903 + 0.034), (0.930 + 0.045), (0.997 + 0.068), and the stress in the three internal fixation models is CBA, and the difference between C and A, B has obvious statistical significance (P0.05). In the A, B, C three groups, there was no significant difference in the longitudinal displacement of the fixed model in the three groups. The lateral displacement of the inner wall of the post column was (0.903 + 0.034), (0.910 + 0.038), (1.117 + 0.380) mm, and the stress in the DASPQ square area was ABC, and the difference was statistically significant. (1) a high simulation normal human body was established in this study. The three-dimensional nonlinear hexahedron finite element model of the pelvis is used to construct the basic pelvic ligament tissue, and the anatomical structure is complete so that the model can basically conform to the true situation of the pelvis. Through the corresponding validation of the model, the model can be used to carry out the biomechanical study related to the clinical. (2) the DAPSQ column is accompanied by the post treatment. The semi transverse acetabular fracture has good biomechanical stability. (3) DASPQ fixed anterior column with posterior half transverse acetabular fracture can provide better biomechanical stability on the premise of the stability of the contralateral pelvic ring.
【學(xué)位授予單位】：湖北中醫(yī)藥大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：R687.3
【參考文獻(xiàn)】
相關(guān)期刊論文 前5條
1 樊艷平;雷建銀;劉海波;李志強(qiáng);陳維毅;;站位骨盆有限元模型的建立[J];太原理工大學(xué)學(xué)報(bào);2015年01期
2 蘇佳燦,張春才,陳維華,陳學(xué)強(qiáng),王保華,吳建國,丁祖泉;骨盆及髖臼三維有限元模型單元選擇及構(gòu)建生物力學(xué)意義[J];中國臨床康復(fù);2004年26期
3 李力更;安志剛;鄭煦光;張瑞杰;馬愛國;王樂;楊海濤;;198例復(fù)雜髖臼骨折的手術(shù)治療[J];中國矯形外科雜志;2010年18期
4 王志杰;丁自海;鐘世鎮(zhèn);;有限元法在骨應(yīng)力分析及骨科內(nèi)外固定系統(tǒng)研究中的應(yīng)用[J];中國臨床解剖學(xué)雜志;2006年01期
5 畢大衛(wèi);韓雷;祖罡;鄭琦;費(fèi)駿;魏威;顧軍;馬海濤;陳億民;胡鋼鋒;;髖臼四方區(qū)復(fù)雜型骨折手術(shù)入路的選擇[J];中國骨傷;2013年11期
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