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Bone Remodeling

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.

Growth of Cartilage and Bone Tissue

Growth of Cartilage and Bone Tissue

Chondrocytes form a temporary cartilaginous model by dividing and secreting a thick gel-like extracellular matrix. Once the chondrocytes undergo programmed cell death, osteoblasts enter the site of the cartilaginous model. The process of replacing the temporary cartilaginous model with bone in an ordered manner is called endochondral ossification. In endochondral ossification, not all of the cartilage is replaced by bone tissue. Some cartilage that performs a protective and supportive function...

Bone as Supporting Connective Tissue

Bone as Supporting Connective Tissue

Bone tissue forms the internal skeleton of vertebrate animals, providing structure to the body.
Bone Matrix
Bone, or osseous tissue, is a connective tissue that has a large amount of two different types of matrix material. The organic matrix is similar to the matrix material found in other connective tissues, including some amount of collagen and elastic fibers. This gives strength and flexibility to the tissue. The inorganic matrix consists of mineral salts— mostly calcium salts— that give the...

Bone Formation by Intramembranous Ossification

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.
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into...

Bone Remodeling and Repair

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 Formation by Endochondral Ossification

Bone Formation by Endochondral Ossification

Bone formation, or ossification, begins around the sixth to seventh week of embryonic development. Most bones develop from a cartilaginous template through the process of endochondral ossification. Cartilage formation begins when clusters of mesenchymal cells differentiate into chondrocytes. These chondrocytes proliferate rapidly and secrete an extracellular matrix that becomes encased in a membrane called the perichondrium. The resulting cartilage model provides a template that resembles the...

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Related Experiment Video

Updated: Jul 2, 2026

Ceramic Omnidirectional Bioprinting in Cell-Laden Suspensions for the Generation of Bone Analogs

Ceramic Omnidirectional Bioprinting in Cell-Laden Suspensions for the Generation of Bone Analogs

Published on: August 8, 2022

Periosteum Organoid: Biomimetic Design Inspired From the Bone Healing Process.

Shuyue Hao^1,2,3,4, Fuxiao Wang^1,2, Jingtao Huang⁵

¹Organoid Research Center Institute of Translational Medicine Shanghai University Shanghai China.

Exploration (Beijing, China)

|January 1, 2026

Summary

Periosteum organoids offer a promising solution for large bone defects, overcoming limitations of traditional bone grafts. This regenerative medicine approach enhances bone repair with multiple biological functions.

Keywords:

Angiogenesis Bone Healing Immunomodulation Neuromodulation Periosteal Biomaterials Periosteum Organoid

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Last Updated: Jul 2, 2026

Ceramic Omnidirectional Bioprinting in Cell-Laden Suspensions for the Generation of Bone Analogs

Ceramic Omnidirectional Bioprinting in Cell-Laden Suspensions for the Generation of Bone Analogs

Published on: August 8, 2022

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Author Spotlight: Advancing Tendon Tissue Engineering with 3D Organoid Models

Author Spotlight: Advancing Tendon Tissue Engineering with 3D Organoid Models

Published on: June 21, 2024

Area of Science:

Regenerative Medicine
Biomaterials Science
Tissue Engineering

Background:

Large bone defects pose significant challenges in reconstructive surgery, with current bone graft methods having limitations.
The periosteum is crucial for bone regeneration but is often damaged in large defects, impairing its function.
Existing tissue-engineered bone constructs often fail to fully replicate native bone's biological complexity.

Purpose of the Study:

To review the structure and function of periosteum in bone regeneration.
To explore the design, application, and integration of periosteum organoids with bone organoids.
To highlight advances and future directions for periosteum organoids in regenerative medicine for bone repair.

Main Methods:

Development of periosteum organoids using advanced organoid technology.
Incorporation of natural/synthetic materials and biologically derived factors into organoids.
Endowing organoids with key regenerative functions: antimicrobial, immunomodulatory, neuromodulatory, angiogenic, and osteogenic.

Main Results:

Periosteum organoids show potential for accelerated bone regeneration.
Organoids can be engineered with multiple biological functions critical for bone healing.
Integration with bone organoids presents a novel strategy for complex bone defect repair.

Conclusions:

Periosteum organoids represent a significant advancement in regenerative medicine for bone repair.
This technology offers a promising alternative to traditional bone grafts for large bone defects.
Future research should focus on optimizing organoid design and clinical integration for enhanced bone regeneration.