ABOUT ROUND LIGAMENT OF FEMUR (ligament of head of femur)

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Model & Prosthesis

Model & Prosthesis

The introduction of a ligamentum capitis femoris analogue into the endoprosthesis will ensure uniform wear and will prevent dislocation.

Our experimental material: https://kruglayasvyazka.blogspot.com/2024/05/1991-2021.html

Publication in the facebook group 05/30/2025.

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THE MAIN TYPES OF VERTICAL POSTURES

The main types of vertical postures Interaction of muscles and ligaments of the hip joint in the main types of vertical postures. See experiments: 1. https://kruglayasvyazka.blogspot.com/2024/07/blog-post_29.html 2. https://kruglayasvyazka.blogspot.com/2024/07/blog-post_96.html 3. https://kruglayasvyazka.blogspot.com/2024/07/blog-post_81.html 4. https://kruglayasvyazka.blogspot.com/2024/07/blog-post_27.html Publication in the facebook group 05/26/2025. BLOG CONTENT NEWS AND ANNOUNCEMENTS FACEBOOK

THE ROLE OF THE HIP JOINT LIGAMENTS

The role of the hip joint ligaments Ligaments tighten when the pelvis tilts, support the body, and correct the movement of the center of mass. A horizontal position of the pelvis in a single-leg stance and during walking is pathological. See experiments: https://kruglayasvyazka.blogspot.com/2024/07/blog-post_26.html https://kruglayasvyazka.blogspot.com/2024/07/lcf_16.html Publication in the facebook group 05/23/2025. BLOG CONTENT NEWS AND ANNOUNCEMENTS FACEBOOK

SINGLE SUPPORT PHASE

Ligaments of the hip joint during the single support phase of walking. When walking, the reaction forces of the hip joint ligaments offloads the muscles and the femoral head, rotates and stabilizes the pelvis. See experiments and discussion: https://kruglayasvyazka.blogspot.com/2024/07/blog-post_19.html https://kruglayasvyazka.blogspot.com/2024/07/blog-post_22.html Publication in the facebook group 05/21/2025. BLOG CONTENT NEWS AND ANNOUNCEMENTS FACEBOOK

AUTOROTATION EFFECT IN THE HIP JOINT

autorotation effect in the hip joint Discovering the autorotation effect in the hip joint: https://kruglayasvyazka.blogspot.com/2024/07/blog-post_14.html explaining it: https://kruglayasvyazka.blogspot.com/2024/07/blog-post_15.html and demonstrating how it helps move people and animals forward: https://kruglayasvyazka.blogspot.com/2024/07/blog-post_70.html The role of the short supinators of the thigh during walking: control of spontaneous forward rotation of the pelvis. Publication in the facebook group 05/19/2025. BLOG CONTENT NEWS AND ANNOUNCEMENTS FACEBOOK

ACTIVITY OF M. GLUTEUS MEDIUS DURING WALKING

Activity of m. gluteus medius during walking Why does m. gluteus medius activity decrease when walking? Preliminary analysis of experimental material: https://kruglayasvyazka.blogspot.com/2024/07/lcf_12.html https://kruglayasvyazka.blogspot.com/2024/07/lcf_10.html Publication in the facebook group 05/17/2025. BLOG CONTENT NEWS AND ANNOUNCEMENTS FACEBOOK

What is more important?

What is more important? What is more important, m. gluteus medius or ligamentum capitis femoris? See the paradox in the experiment and its analysis: https://kruglayasvyazka.blogspot.com/2024/07/lcf_9.html https://kruglayasvyazka.blogspot.com/2024/07/lcf_10.html Publication in the facebook group 05/15/2025. My comment on the view on LCF as a shock absorber: The elastic modulus of rubber is 5-9 MPa, polyethylene film (LDPE) 10-90 MPa. The elastic modulus of tendon is 160 MPa ( Федорова ВН , Фаустов ЕВ , 2008). The elastic modulus of LCF under tension reaches 252.8±23.0 MPa (Gao F, Yang Y, Ma H, 2008). Mechanical properties show that under load along the fibrils, this structure is not elastic enough. In my opinion, LCF acts not as a spring, but as a low-stretch cord. BLOG CONTENT NEWS AND ANNOUNCEMENTS FACEBOOK

COMBINED MODEL WITH AN ANALOGUE LCF

Combined model with an analogue of the ligamentum capitis femoris Experiments on a combined model, X-ray symptoms, modeling of elongation and damage to the ligamentum capitis femoris, as well as its interaction with muscles, see: https://kruglayasvyazka.blogspot.com/2024/07/blog-post.html https://kruglayasvyazka.blogspot.com/2024/07/lcf.html https://kruglayasvyazka.blogspot.com/2024/06/blog-post_73.html Publication in the facebook group 05/10/2025. BLOG CONTENT NEWS AND ANNOUNCEMENTS FACEBOOK

WHY IS IT NECESSARY TO RECONSTRUCT LCF?

Are you repairing the acetabular labrum without reconstructing the ligamentum capitis femoris (ligamentum teres)? Then expect pain, osteoarthritis, contractures, lameness, and hyperlordosis. See experiments: https://kruglayasvyazka.blogspot.com/2024/06/blog-post_25.html , https://kruglayasvyazka.blogspot.com/2024/06/lcf_26.html Publication in the facebook group 05/07/2025. BLOG CONTENT NEWS AND ANNOUNCEMENTS FACEBOOK

2023ArkhipovSV

My dissertation (2013), transformed into a book, is available for reading at the link: https://kruglayasvyazka.blogspot.com/2025/05/2023.html [Rus]. The text is prepared for machine translation using the service built into the blog from Google or your web browser. Arkhipov S.V. The Ligament of the Femoral Head: Function and Role in the Pathogenesis of Coxarthrosis . 2023. [Rus] Abstract In the research clinically and roentgenologically patients with coxarthrosis and a control group of persons. It is studied pathomorphology of the hip joint and change of the ligamentum capitis femoris at operation performance total hip arthroplasty at coxarthrosis and fracture of the neck of the femur without signs coxarthrosis. The biomechanics of the hip joint was studied on mechanical models, the biomechanics of the ligamentum capitis femoris function was clarified during walking and in an upright position in the norm and with damage to this ligament. Localization...

2025ZhangY_MartinRL

We publish without changes an excellent article on the biomechanics of the ligamentum capitis femoris (LCF) by Zhang Y et al. «A finite element analysis model to support ligamentum teres function» (2025). This is an an Open Access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0, https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. Journal of Hip Preservation Surgery A finite element analysis model to support ligamentum teres function Yongni Zhang , Jianing Wang , Linxia Gu , Hal David Martin , RobRoy L Martin Abstract The function of the ligamentum teres (LT) remains debated, particularly its role in limiting motion. The aim of this study was to use finite element analysis to assess LT stress during hip movements, which included external rotation with flexion. A 3D model of the hip joint, including the femoral hea...