CAJ | 학술논문

目的探讨数字化三维重建技术建立的肱骨髁上部位有限元模型在肱骨髁上骨折研究的应用价值.方法1具新鲜成人上肢标本灌注后行CT扫描,选取肱骨髁上部位CT图像并将CT数据导入MIMICS 13.1软件,对肱骨髁上部位主要解剖结构进行三维构建.提取肱骨髁上部位三维模型,导入ANSYS 10.0软件中建立三维有限元模型.将模型按正常人体解剖位置固定,给予上端固定,要求远端各结点于X、Y、Z轴的位移为0,在内髁肱骨滑车施加尺骨作用力,在外髁肱骨小头施加桡骨作用力,分析尺桡侧加载外力后肱骨髁上部位应力分布情况.结果成功对肱骨髁上部位进行三维构建,并建立肱骨髁上部位有限元模型,该模型可以清楚显示肱骨髁上部位骨骼、血管、神经等主要解剖结构.在100~500 N负载压力下,肱骨髁上区尺侧平均应力值高于桡侧(P<0.05).结论肱骨髁上部位主要解剖结构三维构建和有限元模型建立可为临床肱骨髁上骨折的研究提供损伤机制模型,外力加载后肱骨髁上部位尺侧受到的应力较大,肱骨内髁肱骨滑车上施加尺骨作用力更易导致肱骨髁上发生骨折.
목적탐토수자화삼유중건기술건립적굉골과상부위유한원모형재굉골과상골절연구적응용개치.방법1구신선성인상지표본관주후행CT소묘,선취굉골과상부위CT도상병장CT수거도입MIMICS 13.1연건,대굉골과상부위주요해부결구진행삼유구건.제취굉골과상부위삼유모형,도입ANSYS 10.0연건중건립삼유유한원모형.장모형안정상인체해부위치고정,급여상단고정,요구원단각결점우X、Y、Z축적위이위0,재내과굉골활차시가척골작용력,재외과굉골소두시가뇨골작용력,분석척뇨측가재외력후굉골과상부위응력분포정황.결과성공대굉골과상부위진행삼유구건,병건립굉골과상부위유한원모형,해모형가이청초현시굉골과상부위골격、혈관、신경등주요해부결구.재100~500 N부재압력하,굉골과상구척측평균응력치고우뇨측(P<0.05).결론굉골과상부위주요해부결구삼유구건화유한원모형건립가위림상굉골과상골절적연구제공손상궤제모형,외력가재후굉골과상부위척측수도적응력교대,굉골내과굉골활차상시가척골작용력경역도치굉골과상발생골절.
Objective To explore the application value of finite element model of supracondylar part of humerus based on digital 3D reconstruction technology for the research of supracondylar fractures. Methods A fresh specimen of adult upper limb was chosen to undergo CT scan after perfusion. Data of selected CT images of humeral supracondylar part were imported into MIMICS 13.1 software, and then major anatomic structures of supracondylar part were constructed for building 3D finite element model with ANSYS 10.0 software. Upper end of sample was fixed according to normal human anatomic position, and the displacement of each node at distal end in X, Y, Z axis was set to 0. Stress distribution of supracondylar humerus site were analyzed after being added ulnar force on trochlea of the humerus condyle as well as radial force on the capitulum of lateral humeral condyle. Results 3D construction model and element finite model of supracondylar part of humerus were established successfully. Models showed major anatomic structures such as skin, bone, blood vessel, nerve tissue at supracondylar site clearly. Under the loading pressure of 100-500 N, the average stress force value at ulnaris side was higher than that at radialis side (P <0.05). Conclusions 3D construction of the mainly anatomical structure of supracondylar part of humerus and its finite element modeling can provide clinical injury model for supracondylar fracture mechanism. When external force loading on the ulnar or radial side of supracondylar part of humerus, stress force at ulnar side is bigger than radial side which we can conclude that ulna force on the humeral trochlea will more likely lead to supracondylar fractures.