Accession Number : AD0834894

Title :   SCANNING ELECTRON MICROSCOPY STUDIES OF DENTAL ENAMEL.

Descriptive Note : Research progress rept.,

Corporate Author : NAVAL DENTAL RESEARCH INST GREAT LAKES IL

Personal Author(s) : Hoffman, Seymour ; McEwan, William S. ; Drew, Charles M.

Report Date : 15 APR 1968

Pagination or Media Count : 18

Abstract : Samples of sound, untreated enamel and enamel subjected to a number of different treatment procedures were selected for this study, to determine the potential of the scanning electron micro-scope as applied to the study of dental tissue. Sound enamel specimens were treated with acetate buffer (pH 4.0) and with EDTA (pH 7.94) for varying periods of time. The results were compared to those obtained from sound, untreated enamel specimens. Surface and sub-surface enamel morphology and bacteria-like structures were examined, photographed at magnifications ranging from 20X to over 100,000X, and described in relation to the ultra-structural morphology of enamel. Structures resembling enamel prisms, the 'prism-less' zone of surface enamel, the surface covering of an 'enamel skin' and sequential patterns of acid demineralization occuring preferentially down prism cores are described and illustrated. Comparison with EDTA-treated specimens revealed peripheral dissolution of enamel rods, in contrast to the acid effects. Organic surface coverings suggestive of dental plaque and microbial forms resembling cocci and lactobacilli were also shown. (Author)

Descriptors :   (*TEETH, ELECTRON MICROSCOPY), DENTISTRY, ACETATES, BUFFERS, ETHYLENEDINITRILO TETRAACETATES, BACTERIA, MORPHOLOGY(BIOLOGY).

Subject Categories : Medicine and Medical Research

Distribution Statement : APPROVED FOR PUBLIC RELEASE