Jongwon Choi , Junwoo Park , Seyoung Lee , Kitaek Lim , Chunghwi Yi , Stephen Robinovitch , Woochol Joseph Choi
{"title":"髋关节旋转对侧落时股骨粗隆力和软组织厚度的影响","authors":"Jongwon Choi , Junwoo Park , Seyoung Lee , Kitaek Lim , Chunghwi Yi , Stephen Robinovitch , Woochol Joseph Choi","doi":"10.1016/j.medengphy.2025.104436","DOIUrl":null,"url":null,"abstract":"<div><div>We measured the trochanteric soft tissue thickness (TSTT) to determine the force magnitude delivered to the proximal femur (<em>F<sub>trochanteric</sub></em>), and examined how the TSTT and <em>F<sub>trochanteric</sub></em> were affected by hip rotation during sideways falls.</div><div>Twenty individuals participated in pelvis release experiments. Trials were acquired with three hip rotations: 15° external, 0° (neutral), and 15° internal. During trials, kinetics and kinematics of the pelvis and lower extremities were recorded. Outcome variables included the effective stiffness of the pelvis (<em>k</em>), <em>F<sub>trochanteric</sub></em>, TSTT, and force magnitude attenuated by the TSTT (<em>F<sub>attenuation</sub></em>).</div><div>The <em>k</em> and <em>F<sub>trochanteric</sub></em> were associated with hip rotation (<em>F</em>= 5.06, <em>p</em>= 0.011; <em>F</em>= 5.49, <em>p</em>= 0.008, respectively). Both outcome variables were 14 % and 15 % smaller in external compared to neutral and internal rotation, respectively (45.3 versus 52.8 kN/m; 5448 versus 6425 N). However, neither the TSTT nor the <em>F<sub>attenuation</sub></em> was associated with hip rotation (<em>F</em>= 2.92, <em>p</em>= 0.066; <em>F</em>= 2.30, <em>p</em>= 0.114, respectively).</div><div>The <em>F<sub>trochanteric</sub></em> decreased with hip external rotation at impact. This was attributed to decreased pelvis stiffness rather than enhanced protective benefits (i.e., force attenuation) provided by the trochanteric soft tissue. These findings offer valuable insights into the distribution of hip impact forces and may contribute to a better understanding of hip impact biomechanics during falls.</div></div>","PeriodicalId":49836,"journal":{"name":"Medical Engineering & Physics","volume":"146 ","pages":"Article 104436"},"PeriodicalIF":2.3000,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effects of hip joint rotation on the trochanteric force and soft tissue thickness during sideways falls\",\"authors\":\"Jongwon Choi , Junwoo Park , Seyoung Lee , Kitaek Lim , Chunghwi Yi , Stephen Robinovitch , Woochol Joseph Choi\",\"doi\":\"10.1016/j.medengphy.2025.104436\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>We measured the trochanteric soft tissue thickness (TSTT) to determine the force magnitude delivered to the proximal femur (<em>F<sub>trochanteric</sub></em>), and examined how the TSTT and <em>F<sub>trochanteric</sub></em> were affected by hip rotation during sideways falls.</div><div>Twenty individuals participated in pelvis release experiments. Trials were acquired with three hip rotations: 15° external, 0° (neutral), and 15° internal. During trials, kinetics and kinematics of the pelvis and lower extremities were recorded. Outcome variables included the effective stiffness of the pelvis (<em>k</em>), <em>F<sub>trochanteric</sub></em>, TSTT, and force magnitude attenuated by the TSTT (<em>F<sub>attenuation</sub></em>).</div><div>The <em>k</em> and <em>F<sub>trochanteric</sub></em> were associated with hip rotation (<em>F</em>= 5.06, <em>p</em>= 0.011; <em>F</em>= 5.49, <em>p</em>= 0.008, respectively). Both outcome variables were 14 % and 15 % smaller in external compared to neutral and internal rotation, respectively (45.3 versus 52.8 kN/m; 5448 versus 6425 N). However, neither the TSTT nor the <em>F<sub>attenuation</sub></em> was associated with hip rotation (<em>F</em>= 2.92, <em>p</em>= 0.066; <em>F</em>= 2.30, <em>p</em>= 0.114, respectively).</div><div>The <em>F<sub>trochanteric</sub></em> decreased with hip external rotation at impact. This was attributed to decreased pelvis stiffness rather than enhanced protective benefits (i.e., force attenuation) provided by the trochanteric soft tissue. These findings offer valuable insights into the distribution of hip impact forces and may contribute to a better understanding of hip impact biomechanics during falls.</div></div>\",\"PeriodicalId\":49836,\"journal\":{\"name\":\"Medical Engineering & Physics\",\"volume\":\"146 \",\"pages\":\"Article 104436\"},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2025-09-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Medical Engineering & Physics\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1350453325001559\",\"RegionNum\":4,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENGINEERING, BIOMEDICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Medical Engineering & Physics","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1350453325001559","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, BIOMEDICAL","Score":null,"Total":0}
Effects of hip joint rotation on the trochanteric force and soft tissue thickness during sideways falls
We measured the trochanteric soft tissue thickness (TSTT) to determine the force magnitude delivered to the proximal femur (Ftrochanteric), and examined how the TSTT and Ftrochanteric were affected by hip rotation during sideways falls.
Twenty individuals participated in pelvis release experiments. Trials were acquired with three hip rotations: 15° external, 0° (neutral), and 15° internal. During trials, kinetics and kinematics of the pelvis and lower extremities were recorded. Outcome variables included the effective stiffness of the pelvis (k), Ftrochanteric, TSTT, and force magnitude attenuated by the TSTT (Fattenuation).
The k and Ftrochanteric were associated with hip rotation (F= 5.06, p= 0.011; F= 5.49, p= 0.008, respectively). Both outcome variables were 14 % and 15 % smaller in external compared to neutral and internal rotation, respectively (45.3 versus 52.8 kN/m; 5448 versus 6425 N). However, neither the TSTT nor the Fattenuation was associated with hip rotation (F= 2.92, p= 0.066; F= 2.30, p= 0.114, respectively).
The Ftrochanteric decreased with hip external rotation at impact. This was attributed to decreased pelvis stiffness rather than enhanced protective benefits (i.e., force attenuation) provided by the trochanteric soft tissue. These findings offer valuable insights into the distribution of hip impact forces and may contribute to a better understanding of hip impact biomechanics during falls.
期刊介绍:
Medical Engineering & Physics provides a forum for the publication of the latest developments in biomedical engineering, and reflects the essential multidisciplinary nature of the subject. The journal publishes in-depth critical reviews, scientific papers and technical notes. Our focus encompasses the application of the basic principles of physics and engineering to the development of medical devices and technology, with the ultimate aim of producing improvements in the quality of health care.Topics covered include biomechanics, biomaterials, mechanobiology, rehabilitation engineering, biomedical signal processing and medical device development. Medical Engineering & Physics aims to keep both engineers and clinicians abreast of the latest applications of technology to health care.