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Related Concept Videos

Bone Markings01:26

Bone Markings

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Bones have various surface features that help form joints and attach to other soft tissues. Depending on the function, bone markings are categorized into articulating projections, processes for attachment, depressions, and openings.
Articulating Projections
Articulating projections are found where two bones meet to form a joint. These structures are usually found at the ends of bones. The largest articulation is a rounded projection called the head, supported by a narrow neck at the ends of...
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Blood and Nerve Supply to the Bones01:29

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Bones are dynamic organs that require a rich supply of oxygen and nutrients. Around 5% to 10% of the cardiac output supplies blood to the bones. A typical long bone has three main sources: the nutrient artery, the metaphyseal and epiphyseal arteries, and the periosteal arteries.
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The nutrient artery is the main blood vessel that enters the diaphysis via the nutrient foramen. While most long bones have only one nutrient foramen, large bones, such as the femur, may have two. This...
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Fractures: Bone Repair01:27

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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...
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Regulation of Angiogenesis and Blood Supply01:24

Regulation of Angiogenesis and Blood Supply

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Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits.  Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
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Development of Blood Vessels01:07

Development of Blood Vessels

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The development of the vascular system in a fetus is a complex and intricate process that begins as early as 15 to 16 days post-conception. This process starts outside the embryo, specifically in the mesoderm of the yolk sac, chorion, and connecting stalk. Approximately two days later, the formation of blood vessels occurs within the embryo itself.
The initial formation of this system is facilitated by the small amount of yolk present in the ovum and yolk sac. Blood vessels originate from...
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Related Experiment Video

Updated: Jul 3, 2025

Computed Tomography and Optical Imaging of Osteogenesis-angiogenesis Coupling to Assess Integration of Cranial Bone Autografts and Allografts
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Vascularization of a bone stump.

Viktor Shevchuk1, Yurii Bezsmertnyi1, Yankai Jiang1

  • 1Scientific Department, Scientific and Research Institute of Rehabilitation of National Pirogov Memorial Medical University, Vinnytsia, Ukraine.

Medicinski Glasnik : Official Publication of the Medical Association of Zenica-Doboj Canton, Bosnia and Herzegovina
|February 11, 2024
PubMed
Summary

Tight closure of the bone marrow cavity using cortical autografts promotes faster blood circulation recovery in bone stumps after amputation. This method enhances vascular restoration compared to loose closure with myoplasty alone.

Keywords:
amputationbone graftcanalmicrocirculation

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Related Experiment Videos

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Use of Human Perivascular Stem Cells for Bone Regeneration
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Area of Science:

  • Orthopedic Surgery
  • Vascular Biology
  • Regenerative Medicine

Background:

  • Bone stump healing after amputation is critical for patient recovery.
  • Understanding blood circulation dynamics in bone stumps is essential for optimizing surgical techniques.
  • Current methods for medullary cavity closure vary, impacting vascularization and healing outcomes.

Purpose of the Study:

  • To investigate the impact of tight versus loose medullary cavity closure on blood circulation in bone stumps.
  • To compare the vascular recovery patterns following different closure techniques in a rabbit femoral amputation model.

Main Methods:

  • Experiments were conducted on 39 rabbits undergoing mid-third femoral amputation.
  • Two groups were established: tight closure with cortical autograft and loose closure with myoplasty only.
  • Histological analysis using ink-gelatin infusion and morphometry assessed macro- and microcirculation over various time points.

Main Results:

  • The tight closure group (cortical autograft) demonstrated rapid restoration of macro- and microcirculation.
  • Vascular recovery in the tight closure group was supported by reserve blood supply and enhanced extravascular pathways.
  • The loose closure group (myoplasty only) showed significantly slower blood circulation recovery, primarily through extravascular pathways.

Conclusions:

  • Tight closure of the bone marrow cavity with cortical autografts significantly accelerates blood circulation recovery in bone stumps.
  • This technique offers a superior approach for optimizing vascularization and potentially improving healing outcomes post-amputation.
  • The findings highlight the importance of secure medullary closure for effective bone stump regeneration.