Date of Award

1972

Document Type

Thesis - Restricted

Degree Name

Master of Science (MS)

Department

Dentistry

First Advisor

Davies, Ernest E.

Second Advisor

Maher, William P.

Third Advisor

Foshager, Vernon D.

Abstract

Currently, opinion is divided and basic concepts are muddled concerning microarterial, microvenous and capillary distribution in the gingival mucoperiosteum of mammals and especially of man. For nearly a century many microangiologists, each in his own turn and each in his own way, perfused blood vessels of the stomatognathic apparatus with a variety of media in an effort to demonstrate microvessel distribution. Earlier investigators used either India ink in water or carmine gelatine in water. Tissues were cleared and pathway replicas of vascular lumina were examined with the light microscope. Somewhat later, radioangiology became an important diagnostic procedure for clinicians as well as a convenient method for researchers. More recently, latex rubber and plastic resin media became popular. These media permit maceration, subsequent to vascular perfusion, producing thereby cast replicas of microvascular lumina. Most recently plastic microspheres have been injected in vivo. Precalibrated diameters of microspheres have been used as a means to measure vessel diameter. Some of the many factors that influence the extent to which microvessels become filled with the various media are: differences in viscosity of the injection mass, particle size, injection pressure and techniques of tissue preparation prior to and also subsequent to perfusion methods. Consequently there are differences in degree to which vessels are filled, and these differences may be responsible for differences in interpretation of the evidence and subsequent descriptions concerning pathway arrangements. One might expect to find dissimilarities in arrangement of microvessels among various animal classes due to specie differences. One might also expect to find individual differences within the same species. But, in spite of specie or individual difference, one should also expect to find in the literature some expression of basic similarity regarding distribution of microarterial, microvenous, and capillary pathway in mammalian gingiva. There is none to date. A basic arrangement has not emerged even after a century of investigation. Hopefully a fundamental archetypical arrangement of arterial, venous, and blood capillary distribution will emerge.

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