Abstract
Objectives
The objective of this study was to evaluate the cytotoxic reaction of transfected human pulp derived cells (tHPDC) and transfected bovine pulp derived cells (tBPDC) after exposure to resin cements [RelyX UnicemClicker (RX), MaxCem (MC), Panavia F 2.0 (PF), BisCem (BC), and Bistite II DC (BII)] and to compare it to the generation of reactive oxygen species (ROS).
Materials and methods
Set materials were extracted in culture medium, cell survival as a measure of cytotoxicity was determined photometrically using crystal violet after cells were exposed to the extracts for 24 h. The generation of ROS was detected by flow cytometry after cells were exposed to extract dilutions for 1 h.
Results
The ranking of the least to the most cytotoxic material was: RX < BII < PF < BC < MC for both cell lines, but for tHPDC, only MC and PF eluates were different from untreated controls. Generally, tBPDC were more susceptible to materials than tHPDC, but only for RX and BC was this difference statistically significant. All undiluted extracts increased ROS production in both cell lines but to a higher amount in tHPDC than in tBPDC.
Conclusions
tHPDC reacted less sensitive than tBPDC in the cytotoxicity test but with the same rank order of materials. In contrast, the cellular oxidative stress reaction was more pronounced in tHPDC than in tBPDC.
Clinical relevance
Depending on the residual dentine layer in deep cavities, biologically active resin monomers or additives released from resin cements may influence the dentine–pulp complex, for instance, its regenerative and reparative capacities.
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Acknowledgements
This study was based on the work performed by H. Esra Ulker for the fulfillment of the degree of Doctor of Philosophy, Selcuk University, Turkey. This study was supported by the Department of Operative Dentistry and Periodontology, University of Regensburg, Germany; the Scientific and Technological Research Council of Turkey (TUBITAK); and Selcuk University BAP (06102038) and IADR (John Gray Fellowship—2007).
The authors gratefully acknowledge the skillful technical assistance of Carola Bolay (Department of Operative Dentistry and Periodontology, University of Regensburg) and special thanks to Dr. Mustafa Ulker (Department of Operative Dentistry, Selcuk University, Konya, Turkey) for his valuable contributions.
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The authors do not have any conflict of interests.
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Ülker, H.E., Hiller, K.A., Schweikl, H. et al. Human and bovine pulp-derived cell reactions to dental resin cements. Clin Oral Invest 16, 1571–1578 (2012). https://doi.org/10.1007/s00784-011-0657-1
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DOI: https://doi.org/10.1007/s00784-011-0657-1