中国组织工程研究
中國組織工程研究
중국조직공정연구
Journal of Clinical Rehabilitative Tissue Engineering Research
2014年
40期
6513-6518
,共6页
植入物%数字化骨科%髋关节撞击综合征%髋关节%有限元分析%生物力学%接触压力
植入物%數字化骨科%髖關節撞擊綜閤徵%髖關節%有限元分析%生物力學%接觸壓力
식입물%수자화골과%관관절당격종합정%관관절%유한원분석%생물역학%접촉압력
hip joint%three-dimensional,imaging%finite element analysis%biomechanics
背景:Cam型髋关节撞击综合征可使关节承受力学过载并最终导致髋关节骨关节炎,然而其诱发骨关节炎的相关力学机制仍不清楚。<br> 目的:运用三维有限元的方法,分析Cam型髋关节撞击综合征的关节内力学环境,进一步了解其病理力学特点。<br> 方法:采用正常髋关节CT数据,利用Mimics和Hypermesh软件准确构建正常髋关节和Cam型髋关节撞击综合征三维有限元模型。在LS-DYNA 软件中,模拟坐下、起立时的力学加载条件,对正常髋关节和Cam型髋关节撞击综合征髋关节的软骨接触力学进行分析。<br> 结果与结论:基于CT数据准确构建了包含关节软骨的正常髋关节和Cam型髋关节撞击综合征髋关节三维有限元力学分析模型。坐下、起立加载过程中,正常髋关节在最大屈髋位时峰值接触压力分别为4.43,4.59 MPa;而Cam型髋关节撞击综合征髋关节分别为14.96,14.86 MPa,髋臼缘前上方出现过高压力和应力集中。提示髋臼软骨过高的接触压力可能是Cam型髋关节撞击综合征导致骨关节炎的力学机制。
揹景:Cam型髖關節撞擊綜閤徵可使關節承受力學過載併最終導緻髖關節骨關節炎,然而其誘髮骨關節炎的相關力學機製仍不清楚。<br> 目的:運用三維有限元的方法,分析Cam型髖關節撞擊綜閤徵的關節內力學環境,進一步瞭解其病理力學特點。<br> 方法:採用正常髖關節CT數據,利用Mimics和Hypermesh軟件準確構建正常髖關節和Cam型髖關節撞擊綜閤徵三維有限元模型。在LS-DYNA 軟件中,模擬坐下、起立時的力學加載條件,對正常髖關節和Cam型髖關節撞擊綜閤徵髖關節的軟骨接觸力學進行分析。<br> 結果與結論:基于CT數據準確構建瞭包含關節軟骨的正常髖關節和Cam型髖關節撞擊綜閤徵髖關節三維有限元力學分析模型。坐下、起立加載過程中,正常髖關節在最大屈髖位時峰值接觸壓力分彆為4.43,4.59 MPa;而Cam型髖關節撞擊綜閤徵髖關節分彆為14.96,14.86 MPa,髖臼緣前上方齣現過高壓力和應力集中。提示髖臼軟骨過高的接觸壓力可能是Cam型髖關節撞擊綜閤徵導緻骨關節炎的力學機製。
배경:Cam형관관절당격종합정가사관절승수역학과재병최종도치관관절골관절염,연이기유발골관절염적상관역학궤제잉불청초。<br> 목적:운용삼유유한원적방법,분석Cam형관관절당격종합정적관절내역학배경,진일보료해기병리역학특점。<br> 방법:채용정상관관절CT수거,이용Mimics화Hypermesh연건준학구건정상관관절화Cam형관관절당격종합정삼유유한원모형。재LS-DYNA 연건중,모의좌하、기립시적역학가재조건,대정상관관절화Cam형관관절당격종합정관관절적연골접촉역학진행분석。<br> 결과여결론:기우CT수거준학구건료포함관절연골적정상관관절화Cam형관관절당격종합정관관절삼유유한원역학분석모형。좌하、기립가재과정중,정상관관절재최대굴관위시봉치접촉압력분별위4.43,4.59 MPa;이Cam형관관절당격종합정관관절분별위14.96,14.86 MPa,관구연전상방출현과고압력화응력집중。제시관구연골과고적접촉압력가능시Cam형관관절당격종합정도치골관절염적역학궤제。
BACKGROUND:Cam-type femoroacetabular impingement can impose elevated mechanical loading in the hip, and may eventual y result in hip osteoarthritis, while mechanical mechanism on how this deformity leads to osteoarthritis is stil unclear. <br> OBJECTIVE:To analyze intra-articular mechanical environment of Cam-type femoroacetabular impingement in hip joint using three-dimensional finite element method, and to further understand the features of pathological mechanics. <br> METHODThree-dimensional geometry models of normal and Cam-type femoroacetabular impingement joints were constructed using Mimics and Hypermesh software with the CT data of normal hip joint. These hip models were imported into LS-DYNA analysis system, then dynamic loads and motions for standing up and sitting down were applied to al joint models. Intra-articular cartilage contact pressures and stresses were analyzed in normal hip joint and hip joint with Cam-type femoroacetabular impingement. <br> RESULTS AND CONCLUSION:Based on CT data, models of normal hip joint and hip joint with Cam-type femoroacetabular impingement including articular cartilage for three-dimensional finite element analysis were accurately constructed. Peak contact pressures were 4.43 and 4.59 MPa at the anterosuperior region of the acetabular rim during sitting down and standing up. The peaks of Cam-type femoroacetabular impingement hip joint were 14.96 and 14.86 MPa. Peak pressures and stress concentration were found at the anterosuperior area of acetabular rim. High contact pressure at the acetabular cartilage may be the mechanical mechanism of osteoarthritis induced by Cam-type femoroacetabular impingement.