Please use this identifier to cite or link to this item:
|Title:||Influence of environmental calcium/phosphate and pH on glass ionomers||Authors:||Wang, X.Y.
|Issue Date:||2007||Citation:||Wang, X.Y., Jin, A.Y.U., Ngo, H.C. (2007). Influence of environmental calcium/phosphate and pH on glass ionomers. European Journal of Oral Sciences 115 (3) : 224-229. ScholarBank@NUS Repository. https://doi.org/10.1111/j.1600-0722.2007.00443.x||Abstract:||This study investigated the effects of environmental calcium/phosphate and pH on the hardness and elastic modulus of two glass-ionomer cements (GICs) [Fuji IX Fast (FN) and KetacMolar (KM)[. Specimens were randomly subjected to storage media of pH 3, 5, and 7. The calcium and phosphate levels of the storage solutions ranged from 0 to 2.4 mM. After 4 wk of conditioning, hardness and elastic modulus were determined using a depth-sensing microindentation test. Sectioned surfaces were observed with scanning electron microscopy. For both FN and KM, no significant change in hardness, elastic modulus, or surface structure were observed at pH 7 and 5, regardless of the concentration of calcium and phosphate. FN and KM specimens conditioned at pH 3 had lower hardness and modulus in comparison to those conditioned at pH 7. An increased level of environmental phosphate led to higher hardness and elastic modulus of FN and KM at pH 3. In general, a microscopic surface reaction layer was observed in specimens conditioned at pH 3. The thickness and structure of the reaction layer varied depending on environmental phosphate levels. The results suggest that the influence of environmental calcium and phosphate on GICs was pH dependent. © 2007 Eur J Oral Sci.||Source Title:||European Journal of Oral Sciences||URI:||http://scholarbank.nus.edu.sg/handle/10635/46897||ISSN:||09098836||DOI:||10.1111/j.1600-0722.2007.00443.x|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Feb 27, 2020
WEB OF SCIENCETM
checked on Feb 20, 2020
checked on Feb 18, 2020
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.