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Related Concept Videos

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.
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into...
Bone Formation by Endochondral Ossification01:24

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...
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...
Growth of Cartilage and Bone Tissue01:27

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 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 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.

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Related Experiment Video

Updated: May 18, 2026

Direct Mouse Trauma/Burn Model of Heterotopic Ossification
07:01

Direct Mouse Trauma/Burn Model of Heterotopic Ossification

Published on: August 6, 2015

Heterotopic ossification in orthopaedic trauma.

Aaron Nauth1, Erica Giles, Benjamin K Potter

  • 1Department of Surgery, Division of Orthopaedics, St. Michael's Hospital, University of Toronto, Toronto, Ontario, Canada.

Journal of Orthopaedic Trauma
|September 27, 2012
PubMed
Summary

Heterotopic ossification (HO) is bone formation in soft tissues. Recent research clarifies evidence-based prophylaxis and treatment strategies, particularly for orthopaedic trauma patients.

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Direct Mouse Trauma/Burn Model of Heterotopic Ossification
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Creating Rigidly Stabilized Fractures for Assessing Intramembranous Ossification, Distraction Osteogenesis, or Healing of Critical Sized Defects
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Area of Science:

  • Orthopaedic Surgery
  • Pathology
  • Bone Biology

Background:

  • Heterotopic ossification (HO) involves abnormal bone development in non-skeletal tissues.
  • HO is a significant concern in orthopaedic trauma, impacting patient recovery.
  • Recent research has focused on understanding HO's mechanisms and management.

Purpose of the Study:

  • To review current literature on HO pathophysiology.
  • To summarize evidence-based prophylaxis and treatment strategies for HO.
  • To highlight the application of these findings in orthopaedic trauma.

Main Methods:

  • Comprehensive literature review.
  • Analysis of recent research on HO.
  • Focus on studies relevant to orthopaedic trauma.

Main Results:

  • Advances in understanding HO pathophysiology.
  • Clarification of evidence-based prophylaxis methods.
  • Established treatment protocols for HO.

Conclusions:

  • HO management requires a thorough understanding of its pathophysiology.
  • Evidence-based prophylaxis and treatment are crucial for orthopaedic trauma.
  • Continued research is vital for improving HO outcomes.