The Dental cosmos . A section of decalcified dentin about 100 microns thick undergoing dissolutionin a solution of acid calcium phosphate in the presence of a mold Fig. Action of a pure culture of aspergillus in a few drops of a 1 per cent, solutionof lactic acid, on decalcified dentin. vol. xnx.—U) 242 THE DEXTAL COSMO*. of the dentin or enamel, practically thisacceleration is but slight, even where so-lutions are used which are many timesmore powerful than any which are foundin the mouth. In the mouth itself I aminclined to think that this action is aquantity altogether negligible. From
The Dental cosmos . A section of decalcified dentin about 100 microns thick undergoing dissolutionin a solution of acid calcium phosphate in the presence of a mold Fig. Action of a pure culture of aspergillus in a few drops of a 1 per cent, solutionof lactic acid, on decalcified dentin. vol. xnx.—U) 242 THE DEXTAL COSMO*. of the dentin or enamel, practically thisacceleration is but slight, even where so-lutions are used which are many timesmore powerful than any which are foundin the mouth. In the mouth itself I aminclined to think that this action is aquantity altogether negligible. From a teleological point of view itseems highly improbable that compoundsnormally occurring in the mouth, of what-ever nature, have any deleterious effectson the teeth, and in particular on the en-amel; we should, furthermore, be forcedto expect such effects to appear in exces-sive degree in the dog, horse, and otheranimals whose saliva is intensely alkalineas compared with human saliva. Stillless probable does it appear that otherneutral or indifferent constituents of thesaliva have any deleterious effect uponthe hard tooth tissue, or take any partin the production o
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