Journal
JOURNAL OF ENDODONTICS
Volume 40, Issue 8, Pages 1149-1155Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.joen.2014.03.022
Keywords
Endodontic sealers; osteoblastic cells; osteoclastic cells; quaternary ammonium polyethylenimine nanoparticles
Categories
Funding
- FEDER funds through the program COMPETE-Programa Operacional Factores de Competitividade [PEst-C/EME/UI0285/2011]
- Faculty of Dentistry, University of Porto
Ask authors/readers for more resources
Introduction: The incorporation of quaternary ammonium polyethylenimine (QPEI) nanoparticles into endodontic sealers induces alterations in their structure and surface properties, which may affect the compatibility with the periapical tissues. This work addressed the behavior of human bone cells exposed to extracts from commercial and QPEI containing AH Plus (DeTrey, Konstanz, Germany) and Pulp Canal Sealer EWT (PCS; Kerr Italia Srl, Salerno, Italy). Methods: Freshly mixed AH Plus and PCS or containing 2% QPEI (0.3 mL spread over the well bottom of a 24-well plate) were extracted with culture medium (1:5 mL for 24 hours at 37 C) and diluted (1:20-1:5000). Osteoblastic or osteoclastic cells were cultured in the presence of QPEI particles (1%-10%) and were exposed to the extracts from unmodified and QPEI containing sealers. Results: QPEI nanopartides, at 1% and 2%, did not affect cell behavior. On osteoblastic cells, AH Plus and PCS increased DNA at 1:2500 dilution (levels <= 1:100 were cytotoxic). Alkaline phosphatase activity decreased at dilutions <= 1:500. Comparatively, QPEI containing AH Plus increased DNA at 1:2500 and 1:500 dilutions, and QPEI containing PCS induced ALP activity at 1:2500 and 1:500 dilutions. Regarding osteoclastic cells, DNA increased (AH Plus) or was not affected (PCS) at dilutions up to 1:500 and decreased with more concentrated extracts. Tartrate-resistant acid phosphatase activity decreased with dilutions <= 1:500 for both sealers. QPEI containing sealers presented a similar behavior. The sealers affected some intracellular signaling pathways, and QPEI containing sealers further modulate these mechanisms. Conclusions: QPEI nanoparticles, at 2%, did not affect cell behavior. However, the incorporation of 2% QPEI particles into AH Plus and PCS modulates the proliferation and differentiation of bone cells, depending on the sealer and the cell type, without increasing the sealers' cytotoxicity.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available