Resin-modified glass-ionomer setting reaction competition. J Dent Res 2010 Jan;89(1):82-6
Date
12/08/2009Pubmed ID
19966038Pubmed Central ID
PMC3318046DOI
10.1177/0022034509355919Scopus ID
2-s2.0-72449181838 (requires institutional sign-in at Scopus site) 84 CitationsAbstract
Resin-modified glass ionomers (RMGI) set by at least 2 mechanisms dependent upon reactant diffusion prior to gelation. Each reaction's kinetics and setting mechanism may rely on and/or compete with the other. In this study, we investigated RMGI setting reaction interactions using differential scanning calorimetry (DSC) by varying light-cure initiation times. A RMGI was analyzed with isothermal and dynamic temperature scan DSC with light-curing occurring immediately, or at 5 or 10 minutes after mixing as well as without light-activation. Results show that as time allowed for the acid-base reaction increased, the light-activation polymerization exotherm decreased. Conversely, analysis of DSC data suggests that earlier light-activation may limit the acid-base reaction and result in a different structured material. During early RMGI development, acid-base and light-polymerization reactions compete with and inhibit one another.
Author List
Berzins DW, Abey S, Costache MC, Wilkie CA, Roberts HWAuthor
David Berzins BS,PhD Graduate Program Director for Dental Biomaterials in the General Dental Sciences/Dental Biomaterials department at Marquette UniversityMESH terms used to index this publication - Major topics in bold
Acid-Base EquilibriumCalorimetry, Differential Scanning
Chemical Phenomena
Composite Resins
Glass Ionomer Cements
Light-Curing of Dental Adhesives
Polymers
Resins, Synthetic
