Loss of residual monomer from resilient lining materials processed by different methods

Blanca Liliana Torres León, Altair Antoninha Del Bel Cury, Renata Cunha Matheus Rodrigues Garcia

Abstract


Purpose: To evaluate residual monomer release from resilient denture lining materials polymerized by different methods.
Methods: Two materials were assessed: Ever-Soft polymerized by hot water bath or microwave energy, and Light Liner polymerized by chemical reaction and visible light (dual polymerization). Residual monomer release was measured in 12 specimens (40x10x0.3mm) made of each material and polymerization method. The specimens were stored in distilled water for 168 hours at 37ºC, and analyzed daily by ultraviolet spectrometry (Light Liner: 204nm, Ever-Soft: 206nm). Data were analyzed by one-way ANOVA and Bonferroni test (α=0.05). The residual monomer released as a function of time was determined by polynomial regression analysis.
Results: Residual monomer amount released at 168 hours from specimens polymerized by hot water bath (0.27±0.01μg/cm2) was significantly greater (P < 0.05) than from those processed by microwave energy (0.25±0.02μg/cm2). Ever-Soft showed decrease in monomer release over time, tending to stabilize at 96 hours. Light Liner continued to release monomer over time.
Conclusion: Ever-Soft may be polymerized by microwave energy. Residual monomer release values were low, and the monomer levels decreased over time.
Key words: Laboratory research; resilient lining material; residual monomer

Keywords


resilient lining material; residual monomer

Full Text:

PDF


e-ISSN: 1980-6523

ISSN-L: 0102-9460

 

This journal is a member of, and subscribes to the principles of, the Committee on Publication Ethics (COPE) http://www.publicationethics.org


SJR (SCImago Journal & Country Rank) IMPACT FACTOR:

SCImago Journal & Country Rank

Licença Creative Commons

Except where otherwise noted, content of this journal is licensed under a Creative Commons Attribution 4.0 International license.

 

Editorial Policies of Brazilian Scientific Journals. Deposit availability: Blue .

 

Copyright: © 2006-2019 EDIPUCRS