CAJ | 학술논문

目的：建立胫骨远端后侧不同类型骨折三维有限元模型，探讨骨折块高度与关节面受累比例对骨折稳定性的影响。方法获取男性成年人正常足踝CT数据，采用minics 14.0软件进行三维重建，使用geomagic 2012、Solidwork和ANSYS软件制作踝关节有限元模型，利用Solidwork及ANSYS软件，制作两种胫骨远端后侧骨折有限元模型(后外侧型和内侧延伸型)，在对其有限性进行验证基础上，模拟中立位垂直加载全部体重600N的工况，对不同高度(2cm-5cm)以及不同关节面受累比例的骨折模型(共16组)进行有限元分析，分析两种模型的骨折块最大位移程度以及骨折块的高度和关节面受累比例与骨折稳定性的关系。结果(1)两种胫骨远端后侧骨折模型的建立：建立模型还原性良好，关节面接触关系等结果与相关文献中相同加载条件下的生物力学试验结果相符合，可以进行下一步有限元分析。(2)两种模型的有限元分析：两种模型中，胫骨远端关节面受累比例和骨折块高度均与骨折稳定性呈负相关。骨折块高度越大，关节面受累比例越大，则骨折块稳定性越差。结论建立胫骨远端后侧骨折切实可靠。对于累及胫骨远端后方的骨折，胫骨远端关节面受累比例可以作为反映踝关节稳定性的相关指标。
목적：건립경골원단후측불동류형골절삼유유한원모형，탐토골절괴고도여관절면수루비례대골절은정성적영향。방법획취남성성년인정상족과CT수거，채용minics 14.0연건진행삼유중건，사용geomagic 2012、Solidwork화ANSYS연건제작과관절유한원모형，이용Solidwork급ANSYS연건，제작량충경골원단후측골절유한원모형(후외측형화내측연신형)，재대기유한성진행험증기출상，모의중립위수직가재전부체중600N적공황，대불동고도(2cm-5cm)이급불동관절면수루비례적골절모형(공16조)진행유한원분석，분석량충모형적골절괴최대위이정도이급골절괴적고도화관절면수루비례여골절은정성적관계。결과(1)량충경골원단후측골절모형적건립：건립모형환원성량호，관절면접촉관계등결과여상관문헌중상동가재조건하적생물역학시험결과상부합，가이진행하일보유한원분석。(2)량충모형적유한원분석：량충모형중，경골원단관절면수루비례화골절괴고도균여골절은정성정부상관。골절괴고도월대，관절면수루비례월대，칙골절괴은정성월차。결론건립경골원단후측골절절실가고。대우루급경골원단후방적골절，경골원단관절면수루비례가이작위반영과관절은정성적상관지표。
Objective The purpose of this finite element analysis was to construct the finite element models of posterior malleolar fracture and posterior pilon fracture, and then analy whether the stability affecting factors proper that fragment height and the ratio of articular surfaced involved when used for both two fracture models. Methods The CT data of ankle obtained from a normal male volunteer was used to make a three-dimensional reconstruction by mimics 14.0 and geomagic 2012 software. After the building of three-dimensional finite element model of the ankle with the stimulated ligaments in ANSYS software, the validity of the model was verified. The mainly two models of distal tibial posterior fractures in various fragment height and the ratio of articular surfaced involved were cut according to the established methods. The displacements of fragments which reflecting the stability were calculated by finite element analysis and then decided the possible relationship between them and stability. Results The models of distal tibial posterior fractures were established with a relatively good persistence with the results in previous study. Fragment height and the ratio of articular surfaced involved both affect the fracture stability with a similar trend. Both the relationship in the two models was determined. Conclusions The models of distal tibial posterior fractures could be constructed persistent with the real model in the previous study. Fragment height and the ratio of articular surfaced involved both affect the fracture stability with a similar trend for distal tibial posterior fractures.