Can hip abduction reduce the risk of femoral head necrosis deteriorated into osteoarthritis?A 3D finite element analysis

作     者：Guang-Quan Zhou Hong-Lai Zhang 

作者机构：The First Affiliated HospitalGuangzhou University of Chinese MedicineGuangzhouChina School of Medical Information EngineeringGuangzhou University of Chinese MedicineGuangzhouChina 

出 版 物：《Traditional Medicine Research》 (TMR传统医学研究)

年 卷 期：2018年第3卷第5期

页      面：230-236页

学科分类：1002[医学-临床医学] 10[医学] 

基　　金：The authors received grants from Natural Science Foundation of Guangdong Province(2014A030310214) Science and Technology Project of Guangdong Province(2014A020221041) and the Medical Science and Technology Foundation of Guangdong Province(A2015039) 

主　　题：Lower extremity abduction Contact stress Femoral head necrosis Stress transfer path Osteoarthritis Computational biomechanics 

摘      要：The purpose of this study was to investigate biomechanical behavior changes of femoral head necrosis(FHN)by increasing lower extremity abduction(LEA)angle,offering scientific basis on choosing the LEA procedure for the exact ***:Thirty computational models were constructed and used to simulate six different abducent angles with five different progresses of *** initial model was validated by the bony density distribution in X-rays images and the photograph of the cadaver bone in *** stress transfer path(STP)of each model was analyzed and the contact stresses were ***:During the midstance phase,STP of type A showed strong similarities with the healthy level;STP distribution was from the top of the femoral head to the calcar;the damage area of STP of type B was approximately 25%of the *** STPs in both type C1 and C2 were broken *** the increase of the abduction angle,STP of type B transformed into type A,STP of type C1 transformed into type *** of type C2 transformed into type *** was no significant difference in contact stress between the four settings of FHN and normal femoral ***:We found computational biomechanical technique to be a sensitive and useful method for distinguishing the biomechanical difference of FHN during abduction *** results showed that LEA motion could effectively reduce collapse risk and interrupt the disease pathway of FHN deteriorated into ***,our findings indicated that the LEA procedure was suitable for type A,B and C1,while type C2 of FHN involved surgical intervention might get a better clinical outcome.