Accession Number : AD0433105


Title :   SIMULATION WITH CARBON PARTICLES OF BACTERIAL INVASION OF HUMAN GINGIVAL TISSUES,


Corporate Author : SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TEX


Personal Author(s) : GIBSON,William A ; Shannon,Ira L


Report Date : Feb 1964


Pagination or Media Count : 8


Abstract : Carbon particles as a suspension of lamp-black powder in physiologic saline were used to simulate the size range and concentration of bacteria as they occur in the gingival sulcus. Gingival strip biopsies were taken from 24 systemically healthy, young adult males with minimal gingival inflammation. For 12 of the subjects, a thorough tooth scaling was performed in the presence of the carbon particles while the remaining 12 subjects, serving as controls, received no dental treatment of any type. In the unscaled group, no carbon particles were found in the underlying connective tissue, indicating that the biopsy procedure and tissue processing did not produce artifacts. Carbon particles were found, however, in the underlying conne-tive tissues of all subjects in the scaled group. The distribution of the carbon particles was identical to the distribution of bacteria reported in previous histologic studies purporting to demonstrate active bacterial invasion of human gingiva. (Author)


Descriptors :   *MOUTH , MEASUREMENT , BACTERIA , TISSUES(BIOLOGY) , DENTISTRY , TEETH , CARBON , DISTRIBUTION


Distribution Statement : APPROVED FOR PUBLIC RELEASE