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Related Concept Videos

Bone Formation by Intramembranous Ossification01:29

Bone Formation by Intramembranous Ossification

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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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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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Compact Bone01:27

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Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone's overall function.
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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 in Bone Remodeling01:31

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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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Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
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Osteogenesis imperfecta

L L Tosi1

  • 1Department of Orthopedic Surgery, Children's National Medical Center, Washington, DC 20010-2970, USA.

Current Opinion in Pediatrics
|February 1, 1997
PubMed
Summary
This summary is machine-generated.

Significant advancements in understanding osteogenesis imperfecta (OI) genetics and biochemistry have improved prenatal diagnosis. While treatments advance, managing complications like basilar impression requires further research.

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Area of Science:

  • Biochemistry
  • Genetics
  • Pediatric Medicine

Background:

  • Osteogenesis imperfecta (OI) is a group of genetic disorders characterized by fragile bones.
  • Understanding of OI's biochemical and genetic basis has significantly improved over the last two decades.
  • Current management strategies for OI continue to evolve.

Purpose of the Study:

  • To review the progress in understanding osteogenesis imperfecta.
  • To highlight advancements in prenatal diagnostics for OI.
  • To discuss the ongoing challenges and future directions in OI management.

Main Methods:

  • Literature review of recent advancements in OI research.
  • Analysis of progress in diagnostic techniques, including molecular defect identification.
  • Evaluation of current medical and surgical treatment approaches for OI patients.

Main Results:

  • Substantial progress in elucidating biochemical and genetic abnormalities in OI.
  • Improved prenatal detection rates, especially when the specific molecular defect is known.
  • Ongoing development in medical and surgical interventions for OI patients.

Conclusions:

  • Molecular-level understanding and treatment of OI show encouraging progress.
  • Further research is needed to optimize the management of OI complications, such as basilar impression.
  • Continued advancements promise better outcomes for individuals with osteogenesis imperfecta.