Biomaterial Database

Microvascular pressure in the dental pulp and gingiva in cats. 1979

K J Tønder, and G Naess

Pressure in selected microvessels was measured directly on the exposed coronal or apical pulp in one of the upper canine teeth or on the gingiva in a total of 36 cats. The vessels were punctured with glass micropipettes, diameter 1-4 micrometer, and the pressure measured with a modified Wiederhielm servocontrolled counter-pressure technique. Pressures in corresponding vessels in coronal and apical pulp were similar. The pressure in pulpal arterioles, diameter 10-70 micrometer averaged 43 mm Hg, or 36% of mean systemic arterial pressure (PA), while pressure in the pulpal venules, diameter 10-80 micrometer, was on an average 19 mm Hg or 16% of PA. Capillary pressure measured in the coronal pulp averaged 35 mm Hg. Mean arterial systemic pressure was 124 mm Hg. The total vascular pressure drop within the pulp was only 20% of the total systemic arteriovenous pressure difference. Accordingly, only one fifth of the vascular resistance governing pulpal blood flow is situated within the pulp itself. This means that blood flow in the dental pulp in cats may be influenced by mechanisms located extrapulpally. In gingiva only venular pressure was measured, which averaged 19 mm Hg.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D008833	Microcirculation	The circulation of the BLOOD through the MICROVASCULAR NETWORK.	Microvascular Blood Flow,Microvascular Circulation,Blood Flow, Microvascular,Circulation, Microvascular,Flow, Microvascular Blood,Microvascular Blood Flows,Microvascular Circulations
D001794	Blood Pressure	PRESSURE of the BLOOD on the ARTERIES and other BLOOD VESSELS.	Systolic Pressure,Diastolic Pressure,Pulse Pressure,Pressure, Blood,Pressure, Diastolic,Pressure, Pulse,Pressure, Systolic,Pressures, Systolic
D002415	Cats	The domestic cat, Felis catus, of the carnivore family FELIDAE, comprising over 30 different breeds. The domestic cat is descended primarily from the wild cat of Africa and extreme southwestern Asia. Though probably present in towns in Palestine as long ago as 7000 years, actual domestication occurred in Egypt about 4000 years ago. (From Walker's Mammals of the World, 6th ed, p801)	Felis catus,Felis domesticus,Domestic Cats,Felis domestica,Felis sylvestris catus,Cat,Cat, Domestic,Cats, Domestic,Domestic Cat
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
D005260	Female		Females
D005881	Gingiva	Oral tissue surrounding and attached to TEETH.	Gums,Interdental Papilla,Papilla, Interdental,Gum
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
D014655	Vascular Resistance	The force that opposes the flow of BLOOD through a vascular bed. It is equal to the difference in BLOOD PRESSURE across the vascular bed divided by the CARDIAC OUTPUT.	Peripheral Resistance,Total Peripheral Resistance,Pulmonary Vascular Resistance,Systemic Vascular Resistance,Peripheral Resistance, Total,Resistance, Peripheral,Resistance, Pulmonary Vascular,Resistance, Systemic Vascular,Resistance, Total Peripheral,Resistance, Vascular,Vascular Resistance, Pulmonary,Vascular Resistance, Systemic
D014690	Venous Pressure	The blood pressure in the VEINS. It is usually measured to assess the filling PRESSURE to the HEART VENTRICLE.	Blood Pressure, Venous,Blood Pressures, Venous,Pressure, Venous,Pressure, Venous Blood,Pressures, Venous,Pressures, Venous Blood,Venous Blood Pressure,Venous Blood Pressures,Venous Pressures