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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.
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...
Bone Structure01:55

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Within the skeletal system, the structure of a bone, or osseous tissue, can be exemplified in a long bone, like the femur, where there are two types of osseous tissue: cortical and cancellous.
Gross Anatomy of Bone01:17

Gross Anatomy of Bone

The two main features of a long bone are the diaphysis and the epiphysis.
The diaphysis is the tubular shaft that runs between the proximal and distal ends of the bone. The walls of the diaphysis are composed of dense and hard compact bone made of numerous osteons — the functional unit of the compact bone. The hollow region in the diaphysis is called the medullary cavity, which harbors the bone marrow. In infants and children, this marrow cavity is filled with red marrow, whereas in adults, it...
Bone Formation by Intramembranous Ossification01:29

Bone Formation by Intramembranous Ossification

Intramembranous ossification is one of the two processes involved in the development of bones within an embryo. The flat bones of the face, most of the cranial bones, and the clavicles are formed via this process. During intramembranous ossification, the bones develop directly from sheets of undifferentiated mesenchymal connective tissue.
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Spongy Bone01:09

Spongy Bone

All bones comprise an outer layer of compact bone, and an interior made up of spongy bone tissue, also called cancellous or trabecular bone. In long bones, spongy bone tissue is mainly found in the interior of the epiphyses (broad ends of the bone).
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Related Experiment Video

Updated: Jul 11, 2026

The Establishment of a Murine Maxillary Orthodontic Model
04:11

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Published on: October 27, 2023

A topology optimization based model of bone adaptation.

Jean-Marie Rossi1, Sylvie Wendling-Mansuy

  • 1CNRS-USR 2164 Laboratoire d'Aérodynamique et Biomécanique du Mouvement, Marseille Cedex 9, France. jean-marie.rossi@ec-marseille.fr

Computer Methods in Biomechanics and Biomedical Engineering
|September 27, 2007
PubMed
Summary

This study introduces a new computational model to predict bone density and anisotropy, mimicking how bone optimizes its stiffness. The model accurately reflects natural bone structure, aiding in understanding bone diseases and healing.

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Area of Science:

  • Biomechanics
  • Computational Biology
  • Materials Science

Background:

  • Bone remodeling is a complex biological process.
  • Understanding bone density distribution is crucial for diagnosing and treating bone diseases.
  • Existing models may not fully capture bone's self-optimizing nature.

Purpose of the Study:

  • To develop a novel topology optimization model for predicting bone density and anisotropy.
  • To simulate bone as a self-optimizing material maximizing structural stiffness.
  • To validate the model using a 2D proximal femur model.

Main Methods:

  • Utilized homogenization methods for topology optimization.
  • Developed a 2D computational model of the proximal femur.
  • Applied single and multiple loading conditions to the model.
  • Computed homogenized optimal designs with laminated microstructures.

Main Results:

  • Predicted high bone density along the diaphysis and arching struts in the femoral head.
  • Model accurately replicated natural bone density distribution and anisotropy under multiple loads.
  • Demonstrated good agreement with the structural architecture of natural femora.

Conclusions:

  • The novel topology optimization model effectively predicts bone density and anisotropy.
  • This approach offers insights into bone remodeling, fracture repair, and bone disease treatment.
  • The model's accuracy validates its potential for understanding bone's structural optimization.