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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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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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Osteochondritis dissecans.

Sophia Sr Hashim1, Catrin Morgan1, Khaled M Sarraf1

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British Journal of Hospital Medicine (London, England : 2005)
|May 1, 2023
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Osteochondritis dissecans involves acquired bone lesions, often affecting adolescents and young adults. Early diagnosis of this condition is crucial for effective treatment and preventing joint osteoarthritis.

Keywords:
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Area of Science:

  • Orthopedics
  • Pediatric Orthopedics
  • Rheumatology

Background:

  • Osteochondritis dissecans (OCD) is characterized by acquired pathological subchondral bone lesions.
  • Its incidence is unknown, and it has a multifactorial etiology involving genetic and acquired risk factors.
  • OCD commonly affects adolescents and young adults, presenting with variable symptoms like trauma, insidious onset, and exercise-exacerbated pain.

Purpose of the Study:

  • To provide an overview of the presentation, assessment, and management of the juvenile form of osteochondritis dissecans.
  • To highlight the importance of early identification for treatment and prevention of future joint osteoarthritis.

Main Methods:

  • This article provides a review of existing literature and clinical guidelines.
  • It synthesizes information on the epidemiology, etiology, clinical presentation, diagnostic approaches, and therapeutic strategies for juvenile OCD.

Main Results:

  • The knee, ankle, and elbow joints are primarily affected by OCD.
  • Variable patient presentations necessitate a thorough diagnostic workup.
  • Early identification and appropriate management are critical for favorable outcomes.

Conclusions:

  • Juvenile osteochondritis dissecans requires a comprehensive understanding of its multifactorial nature.
  • Prompt diagnosis and tailored management are essential to improve patient prognosis and mitigate long-term joint degeneration.
  • Further research into the incidence and specific etiological factors of OCD is warranted.