Diseases of the soft structures of the teeth and their treatment; a text-book for students and practitioners . uence, ptomains are of much lessinterest than they were twenty years ago. In decomposing pro-tein material quite a large number of ptomains are more or lesspresent as a result of the cleavage action of enzymes and otherhydrolytic agencies. Cadaverin, putrescin, sepsin, musearin, leucin,tyrosin, neuridin, etc., are some of the more important representa-tives of this interesting group. Ptomains do not act as specificpoisons, but many produce diseases when taken into the body withthe foo
Diseases of the soft structures of the teeth and their treatment; a text-book for students and practitioners . uence, ptomains are of much lessinterest than they were twenty years ago. In decomposing pro-tein material quite a large number of ptomains are more or lesspresent as a result of the cleavage action of enzymes and otherhydrolytic agencies. Cadaverin, putrescin, sepsin, musearin, leucin,tyrosin, neuridin, etc., are some of the more important representa-tives of this interesting group. Ptomains do not act as specificpoisons, but many produce diseases when taken into the body withthe food in which they have been produced by bacterial is claimed that pathogenic bacteria present in living tissue can 166 DISE VSES OF THE DENTAL PI LP doI produce sufficient ptomains to seriously affecl the health ofthe individual. Moist gangrene of the i>ul|) is a ready source of ptoinain format ion. ( Vitaiii pathogenic bacteria produce definite synthetic poisonoussubstances of a specific nature, /. e,s the toxins. Toxins arc thesecretions of cells, and arc readily taken up by the surrounding. Fio. 81. \ arioua types of bacilli isolated from gangrenous dental pulps. I [dman.) tissues. The intense poisonous nature of these toxins is respons-ible for the chief symptoms which we recognize in infectious bacillus of diphtheria and tetanus are know n to secrete typicaltoxins. These toxins are always of the same poisonous nature, nematter how or where they are obtained, while the ptomains varywith the nature of the substances from which they are are \cr\ labile substances, and they are readily destroyed NECROSIS AND GANGRENE OF THE DENTAL PULP 167 by heat, direct sunlight and oxygen. Antibodies or antitoxins canbe prepared against toxins, but not against ptomains. As veryfew bacilli are known that produce specific toxins, it is plain whyso few true antitoxins have been artificially prepared. Again, bacteria may produce poisons within their own
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