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J Dent Res 40(1): 97-104, 1961
© 1961 International and American Associations for Dental Research
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Vascular Anastomoses in the Region of the Mandibular Symphysis

DAVID R. REDDEN 1, JACK G. BISHOP 1, JAMES L. MATTHEWS 1, and HOMER L. DORMAN 1

1 Department of Physiology, Baylor University College of Dentistry, Dallas, Texas

The back-pressure in the distal segment of the ligated right mandibular artery of dogs was found to average 115 mm/Hg. A back-pressure of 53 mm/Hg remained after clamping both common carotid arteries and the mandibular symphysis, and zero back-pressure could be obtained only after clamping the ascending branch of the aorta.

Numerous anastomotic blood vessels were visualized radiographically by infusion of thorium dioxide into the right mandibular artery. Crossover between the left and right mandibular arteries occurred only at perfusion pressures above 100 mm/Hg.

The presence of this anastomotic complex offers an explanation for the continued vitality of tissues distal to severed or ligated mandibular arteries following fracture or mandibular resection.

Submitted on May 6, 1960






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