en
Scientific article
English

Inflammatory suppression by endodontic sealers after aging 12 weeks In vitro

Publication date2009
Abstract

Dental endodontic sealers are in intimate contact with tissues around the root apex (periapical area) for extended periods. New endodontic sealers have been developed in the past decade, but the biological responses to many new products are not well documented. In this study, we assessed in vitro monocytic cytotoxic and inflammatory responses to several contemporary endodontic sealers. AH-Plus (AH), Pulp Canal Sealer (PC), Epiphany (EPH), Endo-Rez (ER), and an experimental Endo-Rez (ERx) were initially placed in buffered-saline for 12 weeks to simulate in vivo use. After "aging," specimens were placed in direct contact with THP1 monocytes for 72 h and their cytotoxicity (mitochondrial response; MTT) or ability to trigger or suppress cytokine secretion (ELISA; TNFalpha, IL1beta, IL=6; +/- lipopolysaccharide (LPS) exposure) were measured relative to Teflon (Tf) negative controls. Cellular responses among conditions were compared with ANOVA and Tukey post-hoc analysis (alpha = 0.05). Two of the five sealers, EPH and PC, still suppressed cell mitochondrial activity by 70% or more after 12 weeks of conditioning in saline. No sealer alone activated monocytic TNFalpha, IL1beta, or IL6 secretion (p > 0.05 vs. +LPS controls). When THP1 were activated by LPS after exposure to the sealers, differential suppression of TNFalpha, IL1beta, and IL6 secretion was observed for two of the five sealers tested. (EPH and PC) This data suggest that common endodontic sealers do not activate monocytic TNFalpha, IL1beta, and IL6 secretion in vitro by themselves, but degradation products of the sealers may suppress activation of monocytes.

Keywords
  • Biocompatible Materials
  • Cell Survival/drug effects
  • Cytokines/metabolism
  • Dental Cements/chemical synthesis/therapeutic use
  • Enzyme-Linked Immunosorbent Assay
  • Humans
  • Lipopolysaccharides/pharmacology
  • Mitochondria/drug effects
  • Monocytes/drug effects/metabolism
  • Pulpitis/prevention & control
Citation (ISO format)
BRACKETT, Martha Goël et al. Inflammatory suppression by endodontic sealers after aging 12 weeks In vitro. In: Journal of biomedical materials research. Part B, Applied biomaterials, 2009, vol. 91, n° 2, p. 839–844. doi: 10.1002/jbm.b.31465
Main files (1)
Article (Published version)
accessLevelRestricted
Identifiers
ISSN of the journal1552-4973
535views
1downloads

Technical informations

Creation02/03/2010 3:41:00 PM
First validation02/03/2010 3:41:00 PM
Update time03/14/2023 3:23:41 PM
Status update03/14/2023 3:23:41 PM
Last indexation01/15/2024 7:31:30 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack