Biomaterial Database

Vascular reactions in the dental pulp during inflammation. 1983

K J Tønder

This article deals with blood flow and tissue pressure changes in the inflamed dental pulp. While detailed patho-physiological studies of the circulation in the inflamed pulp are still partly lacking, available data from studies of the normal pulp tissue are also discussed. Knowledge of the normal physiological adjustments may indicate which circulatory changes would take place during inflammation. One of the focal points in the present article is how a localized increased tissue pressure may persist in the inflamed area without a circumferential spread to the rest of the pulp. The article is organized in the following manner: First a short review is given of the vascular changes during inflammation in general. Then available data from morphological and functional studies of the pulpal circulation are treated in some detail. Particular attention is given to the transcapillary fluid flow and the so-called 'self-strangulation theory'. The effect of a localized increased tissue pressure on pulpal blood flow is thereafter discussed.

UI	MeSH Term	Description	Entries
D011312	Pressure	A type of stress exerted uniformly in all directions. Its measure is the force exerted per unit area. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)	Pressures
D011671	Pulpitis	Inflammation of the DENTAL PULP, usually due to bacterial infection in dental caries, tooth fracture, or other conditions causing exposure of the pulp to bacterial invasion. Chemical irritants, thermal factors, hyperemic changes, and other factors may also cause pulpitis.	Inflammation, Endodontic,Endodontic Inflammation,Endodontic Inflammations,Inflammations, Endodontic,Pulpitides
D002199	Capillary Permeability	The property of blood capillary ENDOTHELIUM that allows for the selective exchange of substances between the blood and surrounding tissues and through membranous barriers such as the BLOOD-AIR BARRIER; BLOOD-AQUEOUS BARRIER; BLOOD-BRAIN BARRIER; BLOOD-NERVE BARRIER; BLOOD-RETINAL BARRIER; and BLOOD-TESTIS BARRIER. Small lipid-soluble molecules such as carbon dioxide and oxygen move freely by diffusion. Water and water-soluble molecules cannot pass through the endothelial walls and are dependent on microscopic pores. These pores show narrow areas (TIGHT JUNCTIONS) which may limit large molecule movement.	Microvascular Permeability,Permeability, Capillary,Permeability, Microvascular,Vascular Permeability,Capillary Permeabilities,Microvascular Permeabilities,Permeabilities, Capillary,Permeabilities, Microvascular,Permeabilities, Vascular,Permeability, Vascular,Vascular Permeabilities
D003782	Dental Pulp	A richly vascularized and innervated connective tissue of mesodermal origin, contained in the central cavity of a tooth and delimited by the dentin, and having formative, nutritive, sensory, and protective functions. (Jablonski, Dictionary of Dentistry, 1992)	Dental Pulps,Pulp, Dental,Pulps, Dental
D004108	Dilatation, Pathologic	The condition of an anatomical structure's being dilated beyond normal dimensions.	Ectasia,Dilatation, Pathological,Dilatations, Pathologic,Dilatations, Pathological,Pathologic Dilatation,Pathologic Dilatations,Pathological Dilatation,Pathological Dilatations
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D014664	Vasodilation	The physiological widening of BLOOD VESSELS by relaxing the underlying VASCULAR SMOOTH MUSCLE.	Vasodilatation,Vasorelaxation,Vascular Endothelium-Dependent Relaxation,Endothelium-Dependent Relaxation, Vascular,Relaxation, Vascular Endothelium-Dependent,Vascular Endothelium Dependent Relaxation