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Related Concept Videos

Bone Remodeling01:40

Bone Remodeling

Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
Fractures: Bone Repair01:27

Fractures: Bone Repair

Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the procedure...
Bone Remodeling and Repair01:31

Bone Remodeling and Repair

Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during bone...
Deformation of Member under Multiple Loadings01:11

Deformation of Member under Multiple Loadings

When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...

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Articles linked to this work by shared authors, journal, and citation graph.

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Same author

Combined Reconstruction of the Posterolateral Corner, Anterior Cruciate Ligament, and Lateral Extra-articular Tenodesis Using Autografts and a Single Femoral Tunnel.

Arthroscopy techniques·2026
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[Protocol for a Randomized Clinical Trial to Assess the Effects of Extra-Articular Strengthening in Anterior Cruciate Ligament Reconstruction on the Clinical and Functional Condition of High-Performance Athletes].

Revista brasileira de ortopedia·2026
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Protocol for a Randomized Clinical Trial to Assess the Effects of Extra-Articular Strengthening in Anterior Cruciate Ligament Reconstruction on the Clinical and Functional Condition of High-Performance Athletes.

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[Update on Meniscal Injury Treatment].

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Update on Meniscal Injury Treatment.

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Correction: DEEP lateral femoral notch sign is associated with lateral meniscus tear and non-spherical lateral femoral condyle in ACL deficient knee.

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Related Experiment Video

Updated: Jun 20, 2026

Surgical Retrieval, Isolation and In vitro Expansion of Human Anterior Cruciate Ligament-derived Cells for Tissue Engineering Applications
08:30

Surgical Retrieval, Isolation and In vitro Expansion of Human Anterior Cruciate Ligament-derived Cells for Tissue Engineering Applications

Published on: April 30, 2014

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Re-tensioning Anterior Cruciate Ligament Reconstruction Using an Adjustable Femoral Button.

José Leonardo Rocha de Faria1,2, Douglas Mello Pavão1, Rafael Erthal de Paula1,2

  • 1Instituto Nacional de Traumatologia e Ortopedia Jamil Haddad, Rio de Janeiro, Brazil.

Video Journal of Sports Medicine
|May 1, 2025
PubMed
Summary

This modified anterior cruciate ligament (ACL) reconstruction technique uses hamstring grafts and re-tensioning to reduce postoperative laxity. The method aims to improve functional outcomes and patient quality of life after surgery.

Keywords:
ACLACL reconstructionfemoral fixationhamstringsknee

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Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering
  • Sports Medicine

Background:

  • Persistent functional impairment after anterior cruciate ligament (ACL) reconstruction remains a challenge.
  • Current rehabilitation protocols and surgical techniques do not always restore full function or quality of life.
  • This study addresses limitations in traditional ACL treatment by modifying the reconstruction method.

Purpose of the Study:

  • To present a modified ACL reconstruction technique involving hamstring tendon grafts and graft re-tensioning.
  • To reduce postoperative residual laxity and improve physical examination findings.
  • To enhance overall clinical outcomes following ACL surgery.

Main Methods:

  • Utilizes hamstring tendon grafts for ACL reconstruction.
  • Employs femoral fixation with an adjustable button and tibial fixation with an interference screw.
  • Incorporates a novel graft re-tensioning step after initial tibial fixation and uses the braid graft technique for augmentation.

Main Results:

  • The modified technique results in reduced postoperative residual laxity.
  • Enhanced graft tension is achieved through the re-tensioning maneuver.
  • Improved physical examination results are anticipated postoperatively.

Conclusions:

  • The ACL re-tensioning technique is easily implemented and minimally invasive.
  • It effectively counteracts the loss of graft tension that can occur during interference screw fixation.
  • This approach is expected to yield superior clinical outcomes and patient satisfaction.