Endochondral Ossification
Endochondral Ossification - Related Videos
07:23
Culture of Murine Embryonic Metatarsals: A Physiological Model of Endochondral Ossification
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Cited by 24 •
2016
We present a protocol to dissect and culture embryonic day 15 (E15) murine metatarsal bones. This highly physiological ex vivo model of endochondral ossification provides conditions closer to the in vivo situation than cells in monolayer or 3D culture and is a vital tool for investigating bone growth and development.
01:24
Bone Formation by Endochondral Ossification
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2025
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...
06:05
Integrated Bone Formation Through In Vivo Endochondral Ossification Using Mesenchymal Stem Cells
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2023
Bone therapy via endochondral ossification by implanting artificial cartilage tissue produced from mesenchymal stem cells has the potential to circumvent the drawbacks of conventional therapies. Hyaluronic acid hydrogels are effective in scaling up uniformly differentiated cartilage grafts as well as creating integrated bone with vascularization between fused grafts in vivo.
01:29
Bone Formation by Intramembranous Ossification
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2025
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...
07:35
Creating Rigidly Stabilized Fractures for Assessing Intramembranous Ossification, Distraction Osteogenesis, or Healing of Critical Sized Defects
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Cited by 20 •
2012
This article describes a method for stabilizing long bone fractures that is based on the application of modified Ilizarov external fixators 1-3. After application of the fixators and creation of the bone injury, healing can be assessed, distraction osteogenesis can be performed, or non-union or critical sized defect can be created and used to study therapeutic interventions.
FAQs
Chondrocytes drive successive changes in the cartilage model by proliferating, enlarging, and modifying the surrounding matrix. Their enlargement and matrix alterations prepare cartilage for calcification and the later arrival of blood vessels. These cell behaviors create the changing scaffold that allows osteoblasts to deposit bone during skeletal development.
Matrix calcification changes the cartilage environment before bone deposition occurs, while blood-vessel invasion accompanies the transition toward developing bone. Together, these events help transform the altered cartilage scaffold into a site where osteoblasts can deposit mineralized tissue. Their sequence links cartilage remodeling with the formation of bone.
The growth plate coordinates cartilage production and replacement so that long bones expand in length rather than only becoming thicker. Its organized activity supports continued lengthwise growth during development. When the growth plate closes, this coordinated source of longitudinal expansion ends, limiting further lengthening of the bone.
Because skeletal development depends on correctly timed changes in chondrocytes, cartilage matrix, vascular invasion, and osteoblast activity, disruption at any stage can affect bone formation or growth. Studying endochondral ossification therefore helps researchers investigate congenital skeletal disorders by connecting developmental abnormalities with specific stages of the cartilage-to-bone transition.
The process provides a framework for understanding how cell behavior and tissue transitions control skeletal growth. In particular, activity within the growth plate links chondrocyte changes to lengthwise expansion of long bones, while eventual plate closure marks the end of that growth phase. This makes the system useful for examining regulation of body development.
Endochondral ossification offers a biological model for understanding how cartilage transitions into mineralized bone. That transition is relevant to fracture repair, where cartilage-to-bone changes influence healing, and to regenerative medicine, which seeks to guide tissue formation. Studying the sequence of matrix alteration, vascular invasion, and osteoblast deposition can inform these areas.