Resin-modified Glass-ionomer Setting Reaction Competition

Authors

David W. Berzins, Marquette UniversityFollow
S. Abey, Marquette University
M. C. Costache, Marquette University
Charles A. Wilkie, Marquette UniversityFollow
H. W. Roberts, USAF Dental Evaluation & Consultation Service

Document Type

Article

Publication Date

2010

Publisher

SAGE

Source Publication

Journal of Dental Research

Source ISSN

0022-0345

Original Item ID

DOI: 10.1177/0022034509355919

Abstract

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.

Comments

Accepted version. Journal of Dental Research, Vol. 89, No. 1 (2010): 82-86. DOI. © 2010 SAGE. Used with permission.

Recommended Citation

Berzins, David W.; Abey, S.; Costache, M. C.; Wilkie, Charles A.; and Roberts, H. W., "Resin-modified Glass-ionomer Setting Reaction Competition" (2010). Chemistry Faculty Research and Publications. 19.
https://epublications.marquette.edu/chem_fac/19