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Related Concept Videos

Bone Formation by Endochondral Ossification01:24

Bone Formation by Endochondral Ossification

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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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Bone Formation by Intramembranous Ossification01:29

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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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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.
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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...
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Related Experiment Video

Updated: Mar 21, 2026

Calvarial Model of Bone Augmentation in Rabbit for Assessment of Bone Growth and Neovascularization in Bone Substitution Materials
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Hydroxyapatite Dome for Bone Neoformation in Rabbit Tibia.

Nancy Tiaki Maeda, Marcelo Yoshimoto, Sergio Allegrini

    The International Journal of Oral & Maxillofacial Implants
    |May 17, 2016
    PubMed
    Summary
    This summary is machine-generated.

    Hydroxyapatite (HA) domes effectively promote bone growth over rabbit cortical bone. Beta-tricalcium phosphate (β-TCP) filler resulted in superior bone formation compared to blood clot, while vitamin complex hindered it.

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    Area of Science:

    • Biomaterials Science
    • Orthopedic Research
    • Tissue Engineering

    Background:

    • Hydroxyapatite (HA) scaffolds are utilized for bone regeneration.
    • Understanding osteogenesis promotion is crucial for orthopedic applications.

    Purpose of the Study:

    • To evaluate supracortical bone neoformation using hydroxyapatite (HA) hollow domes.
    • To assess the influence of different fillers on HA dome osteogenesis.

    Main Methods:

    • Nine rabbits received 18 HA domes with fillers: blood clot, vitamin complex, or β-tricalcium phosphate (β-TCP).
    • A 8-week healing period was followed by microscopic and spectroscopic analysis of neoformed bone tissue.

    Main Results:

    • β-TCP filler yielded the highest bone formation (14.1%) with organized structures.
    • HA domes with blood clot demonstrated osteoconductivity via cell migration (7.5% bone formation).
    • Vitamin complex filler impeded bone neoformation due to poor blood penetration.

    Conclusions:

    • HA hollow domes serve as stable, well-integrated scaffolds for rabbit cortical bone neoformation.
    • β-TCP filler significantly enhanced bone formation compared to blood clot.
    • HA domes exhibit osteoconductive properties, particularly with blood clot filler, facilitating cell migration.