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Related Concept Videos

Blood Flow01:29

Blood Flow

Blood is pumped by the heart into the aorta, the largest artery in the body, and then into increasingly smaller arteries, arterioles, and capillaries. The velocity of blood flow decreases with increased cross-sectional blood vessel area. As blood returns to the heart through venules and veins, its velocity increases. The movement of blood is encouraged by smooth muscle in the vessel walls, the movement of skeletal muscle surrounding the vessels, and one-way valves that prevent backflow.
Inflammation01:38

Inflammation

Overview
Regulation of Angiogenesis and Blood Supply01:24

Regulation of Angiogenesis and Blood Supply

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 hydroxylase and factor...
Vascular Spasm01:16

Vascular Spasm

The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last for...
Vascular Resistance01:20

Vascular Resistance

Vascular resistance is a critical concept in understanding blood flow dynamics in the circulatory system. It refers to the resistance that blood encounters as it flows through the blood vessels. This resistance is a key factor in determining blood pressure and cardiac workload.
The primary determinants of vascular resistance are vessel diameter, blood viscosity, and vessel length. Among these, vessel diameter plays the most significant role due to the fourth power relationship described by...
Autoregulation of Blood Flow01:17

Autoregulation of Blood Flow

Autoregulation mechanisms are characterized by their inherent capacity for self-regulation without necessitating specific nervous stimulation or endocrine control. These mechanisms facilitate the adjustment of blood flow and, therefore, perfusion specific to each tissue region. This self-regulation encompasses chemical signals and myogenic controls.
Chemical Signaling in Autoregulation
Chemical signaling operates at the precapillary sphincter level, inciting either contraction or relaxation.

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Related Experiment Video

Updated: Jul 21, 2026

Two Methods for Decellularization of Plant Tissues for Tissue Engineering Applications
05:20

Two Methods for Decellularization of Plant Tissues for Tissue Engineering Applications

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Influence of pressure on mandibular angiosomes: What implications for decellularization?

Corentin Serra1, Romain Monchaux2, Benjamin Salmon3

  • 1Laboratory of Mechanics and Interfaces, ENSTA, Institut Polytechnique de Paris, 91120, Palaiseau, France; Faculté de Santé, Université Paris Cité, 75005, Paris, France; Maxillofacial and Plastic Surgery, Necker Children Hospital, APHP, 75015, Paris, France.

Bone
|November 20, 2025
PubMed
Summary

This study reveals how blood flow territories in the human mandible change with pressure, crucial for improving bone grafting techniques and decellularization protocols.

Keywords:
AngiosomaBone perfusionDecellularization by perfusionHuman mandibleMassive bone allograftsPressure-controlled perfusionVascular territories

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Area of Science:

  • Biomedical Engineering
  • Anatomy
  • Regenerative Medicine

Background:

  • Bone vascularization is poorly understood, hindering reconstructive surgery and bone graft viability.
  • Current anatomical methods struggle to map complex, pressure-dependent blood flow in bone.

Purpose of the Study:

  • To develop and validate a novel method for analyzing pressure-dependent vascular territories in the human mandible.
  • To optimize decellularization by perfusion protocols for bone allografts.

Main Methods:

  • Integrated pressure-controlled perfusion with 3D imaging (contrast-enhanced cone beam computed tomography) on human cadaveric mandibles.
  • Utilized a custom segmentation pipeline to create pressure maps of mandibular vascular distribution.
  • Systematically increased perfusion pressure to observe territory expansion and resistance patterns.

Main Results:

  • Identified a low-pressure anastomosis between maxillary, facial, and mental arteries, indicating shared intraosseous territories.
  • Observed a radial perfusion pattern from the inferior alveolar artery with increasing resistance towards cortical bone.
  • Determined perfusion saturation around 100-125 hPa, aligning with physiological pressures, and noted higher thresholds for cortical bone.

Conclusions:

  • Pressure-driven perfusion analysis offers critical insights into bone vascularization dynamics.
  • Optimizing pressure parameters can enhance decellularization efficiency for bone allografts, improving integration and viability.
  • Findings challenge static angiosoma models, emphasizing the need for pressure-controlled anatomical studies in bone vascularization research.