The composition of dental calculus—III

摘要: Abstract 4192 individual samples of supragingival calculus from the molar and lingual areas were analysed both chemically chromatographically for amino acid saccharide composition. The nitrogen content upper was consistently higher than that lower anterior calculus. concentration in correspondingly but differed Lower contained serine, alanine, glycine, glutamic almost always arginine lysine. These acids not found, when concentrations Histidine, ornithine, taurine, methionine, homoserine, homocysteine-thio-lactone hydroxyproline found any Limited quantities hydroxylysine, tyrosine tryptophane inconsistently. amounted to about 20 per cent matrix consisted galactose, glucose, rhamnose, mannose, glucuronic acid, galactosamine sometimes arabinose, galacturonic glucosamine. Fucose, xylose, desoxyribose, raffinose, glucuronolactone sialic found. No difference content, or chromatographically, between same different mouths. It concluded is a reflection plaque origin, plus residues microflora, salivary mucoid precipitation.