A new laboratory method for evaluating the relative solubility and erosion of dental cements

Abstract

A method for accelerating the dissolution and erosion of 'acidic' dental cements has been developed which gave relative solubilities in accordance with in vivo observations, in contrast to the conventional test. It involves subjecting 24-h-old specimens to a jet of dilute acid (lactic or citric) and determining weight loss. The relative ranking for 'acidic' cements in the apparatus and in vivo was: glass ionomer less than silicophosphate less than zinc phosphate less than polycarboxylate. The method was not valid for reinforced zinc oxide/eugenol/EBA cements. Of the two polycarboxylate cements studied, a brand which has the acid in the powder was found to be more soluble than the conventional material. It is proposed that the method be the basis of a new solubility/erosion test in national and international standards for 'acidic' dental cements.

Evaluation of Flowable Resin Composite Surfaces Eroded by Acidic and Alcoholic Drinks

“…This method evaluates the depth loss of cement in order to quantify the erosion and thus enables material comparisons to be made. This is a slight variation of the method originally proposed by Beech and Bandyopadhyay 7) . In contrast, orange juice, whisky and cola cause degradation in resin composite materials 8) .…”

Morphological analysis of flowable resins after long-term storage or surface polishing with a mini-brush

“…Acid erosion has clinical significance for dental materials, because acidic conditions can occur orally either as a result of the ingestion of acidic foods or as a result of the degradation of polysaccharides to acids in stagnant areas of the mouth 1) . For this reason, the lactic acid erosion experiment method has been used to test the stability of dental materials 2,3) . On the other hand, it is apparent that a long-term observation of several years' duration is necessary to evaluating resin materials in the complex oral environment.…”

Comparative Evaluation of Shear Bond Strength of Luting Cements to Different Core Buildup Materials in Lactic Acid Buffer Solution

“…This was done to simulate the in vivo conditions. The lactic acid of pH 4 was used based on the previous invitro studies [9,[20][21][22][23][24][25][26][27].…”