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Bone Formation by Endochondral Ossification01:24

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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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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...
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Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
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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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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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Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
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Autologous Microfractured and Purified Adipose Tissue for Arthroscopic Management of Osteochondral Lesions of the Talus
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[Osteochondritis dissecans].

Per Gorm Jørgensen1, Per Hölmich

  • 1pergorm@gmail.com.

Ugeskrift for Laeger
|December 7, 2017
PubMed
Summary

Osteochondritis dissecans (OCD) is a knee condition known for over a century, potentially caused by trauma or genetic factors. Treatment ranges from conservative rest and bracing to surgical interventions like drilling or fixation.

Area of Science:

  • Orthopedics
  • Sports Medicine
  • Pediatric Orthopedics

Background:

  • Osteochondritis dissecans (OCD) is a joint condition affecting bone and cartilage.
  • It has been recognized for over 100 years, with various etiological factors proposed.
  • The knee is the most common site for OCD development.

Purpose of the Study:

  • To provide an overview of Osteochondritis dissecans (OCD).
  • To discuss the causes, diagnosis, and treatment options for OCD, particularly in adolescents.

Main Methods:

  • Review of existing literature on Osteochondritis dissecans.
  • Discussion of diagnostic imaging techniques including X-ray and MRI.
  • Overview of conservative and operative treatment strategies.

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Main Results:

  • Osteochondritis dissecans (OCD) can stem from trauma, microtrauma, ischemia, or genetic predispositions.
  • Diagnosis in adolescents typically involves knee X-rays and MRI scans.
  • Treatment varies from conservative management (rest, bracing) to surgical options (drilling, fixation).

Conclusions:

  • Osteochondritis dissecans (OCD) requires a tailored treatment approach based on diagnostic findings.
  • Early diagnosis and appropriate management are crucial for favorable outcomes in patients with knee OCD.