Adhesion of carboxylate cements to hydroxyapatite. I. The effect of the structure of aliphatic carboxylates on their uptake by hydroxyapatite.
An investigation was made into the effect of the structure and functionality of aliphatic carboxylates on their sorption onto hydroxyapatite with a view to ascertaining factors affecting the adhesion of polyacrylate cements to tooth materials. In general, the amount of carboxylate sorbed was found to increase with the number of groups contained in the molecule. Thus, polyacrylate was found to be much more strongly sorbed than low molecular weight species. Sorption of the low molecular weight species appeared to be related to stereochemical factors rather than to the stability constants of their calcium chelates.
Adhesion of carboxylate cements to hydroxyapatite. II. Adsorption of aromatic carboxylates.
An investigation was made into the effect of structure and functionality of aromatic carboxylates on their adsorption on to hydroxyapatite (HAP) with a view to identifying factors affecting the adhesion of polyacrylate cements to tooth materials. In general, the amount of carboxylate adsorbed was found to increase with the number of groups contained in the molecule. The arrangement of these groups around the benzene ring also affected adsorption. These results suggested that adsorption was the result of a cooperative effect between carboxylate groups. An adsorption isotherm for mellitate on to HAP was constructed.
The science of adhesion
The present paper, Part 1, reviews surface and interfacial phenomena, including mechanisms of adhesion, which are relevant to the adhesive joining of materials with the aim of outlining the current philosophies, and relating them, where possible, to the practice of adhesive bonding. Part 2 will examine the mechanics of adhesive joint fracture and the effects of various operating environments on joint performance.