background: the biocompatibility of resin-modifi ed glass ionomers (rmgis) as a lining material is still under question. the present study evaluated the response of the pulp-dentin complex following application of resin-modifi ed glass-ionomer cement, calcium hydroxide and conventional glass-ionomer in deep cavities prepared in human teeth. materials and methods: in this controlled clinical tri...

Earlier it has been shown that nucleic acids of high molecular weight can be be introduced into cells by coprecipitation with calcium phosphate. We have studied the requirements for calcium phosphate coprecipitation of shorter nucleotides. The degree of coprecipitation of dodecanucleotides lacking terminal phosphate varied between 25 and 72%. Tetramers with a 5'-monophosphate were coprecipitate...

Glass-ionomer cements were developed by Wilson and McLean at the Laboratory of the Government Chemist in England in 1965. They were a logical addition to the family of water-based dental cements, comprising silicate cement, zinc phosphate cement and zinc polycarboxylate cement. Since their commercial introduction, they are now available in essentially two types. ‘Conventional’ glass-ionomers co...

The authors review the various bone substitutes which are currently available on the market place in Belgium. After describing the requirements for clinical use of such materials, they compare the biological and mechanical values of bone autografts, bone allografts, demineralised bone, xenografts, coral and synthetic materials such as calcium sulfate, calcium phosphate, ionic cement and bioacti...

Oyster shells have received attention for use as a calcium resource. For this study, calcium phosphate was prepared from phosphoric acid and oyster shells. The influences of the concentration of phosphoric acid and pH in the preparation conditions were studied from the yields of calcium phosphate and unreacted carbonate, and the Ca/P ratios in precipitates. The yield of calcium phosphate and ca...

An acidic intravenous source of phosphorus (Addiphos) was compared with dipotassium hydrogen phosphate in 25 preterm infants to study acid-base state. Eight infants were given either Addiphos or dipotassium hydrogen phosphate alternately for 48 hour periods and similar amounts of calcium and phosphorus were delivered. There were no significant differences in calcium and phosphorus intake, calci...

Oligomer Coupling Agents in Phosphate Based Glass Fibre/PLA Composites P Haque, AJ Parsons, I Ahmed, DJ Irvine, GS Walker, CD Rudd (Univ of Nottingham) Polylactic acid oligomers as coupling agents have showed potentially higher interfacial shear strength in phosphate based glass fibre/ PLA composites. To influence bonding on the glass fibre surface, the short chain PLA with different end groups...

Treatment of hyperphosphataemia consists of dietary phosphorus restriction and/or dialysis and phosphate binders. Almost all dialysis patients require phosphate binders (calcium acetate, calcium carbonate, aluminium hydroxide). The use of calcium-based phosphate binders can result in chronic calcium overload, hypercalcemia and soft tissue calcification. Hypercalcemia is particularly common in p...

Aim and objective: The aim of the study is to associate salivary calcium and phosphate in oral health. Background: Salivary glandular secretion which constantly bathes the teeth and oral mucosa. Presence of saliva is vital for healthy oral tissue. Positive correlation has been shown in salivary calcium and phosphate and oral health. Reason: To associate role of salivary calcium and phosphate in...

Calcium hydroxyapatite can be a significant component of black pigment gallstones. Diverse molecules that bind calcium phosphate inhibit hydroxyapatite precipitation. Because glycine-conjugated bile acids, but not their taurine counterparts, bind calcium phosphate, we studied whether glycochenodeoxycholic acid inhibits calcium hydroxyapatite formation. Glycochenodeoxycholic acid (2 mM) totally ...