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Clinical Oral Investigations

Published in:

01-06-2018 | Original Article

Porous zirconia ceramic as an alternative to dentin for in vitro dentin barriers cytotoxicity test

Authors: Meng-Long Hu, Hong Lin, Ruo-Dan Jiang, Li-Min Dong, Lin Huang, Gang Zheng

Published in: Clinical Oral Investigations | Issue 5/2018

Abstract

Objectives

This study assessed the potential of porous zirconia ceramic as an alternative to dentin via an in vitro dentin barrier cytotoxicity test.

Methods

The permeability of dentin and porous zirconia ceramic was measured using a hydraulic-conductance system, and their permeability was divided into two groups: high and low. Using an in vitro dentin barrier test, the cytotoxicity of dental materials by dentin and porous zirconia ceramic was compared within the same permeability group. The L-929 cell viability was assessed by MTT assay.

Results

The mean (SD) permeability of the high and low group for dentin was 0.334 (0.0873) and 0.147 (0.0377) μl min⁻¹ cm⁻² cm H₂O⁻¹ and for zirconia porous ceramic was 0.336 (0.0609) and 0.146 (0.0340) μl min⁻¹ cm⁻² cm H₂O⁻¹. The cell viability of experimental groups which are the low permeability group was higher than that of the high permeability group for both dentin and porous zirconia ceramic as a barrier except for Maxcem Elite^™ by porous zirconia ceramic. There was no significant difference between dentin and porous zirconia ceramic in cell viability, within either the high or low permeability group for all materials. The SD for cell viability of the porous zirconia ceramic was less than that of the dentin, across all materials within each permeability group, except for Maxcem Elite^™ in the high permeability group.

Conclusions

Porous zirconia ceramic, having similar permeability to dentin at the same thickness, can be used as an alternative to dentin for in vitro dentin barrier cytotoxicity tests.

Clinical relevance

In vitro dentin barrier cytotoxicity tests when a standardized porous zirconia ceramic was used as a barrier could be useful for assessing the potential toxicity of new dental materials applied to dentin before applying in clinical and may resolve the issue of procuring human teeth when testing proceeds.

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Title: Porous zirconia ceramic as an alternative to dentin for in vitro dentin barriers cytotoxicity test
Authors: Meng-Long Hu
Hong Lin
Ruo-Dan Jiang
Li-Min Dong
Lin Huang
Gang Zheng
Publication date: 01-06-2018
Publisher: Springer Berlin Heidelberg
Published in: Clinical Oral Investigations / Issue 5/2018
Print ISSN: 1432-6981
Electronic ISSN: 1436-3771
DOI: https://doi.org/10.1007/s00784-017-2302-0

At a glance: The STEP trials

Springer Medicine

Porous zirconia ceramic as an alternative to dentin for in vitro dentin barriers cytotoxicity test

Abstract

Objectives

Methods

Results

Conclusions

Clinical relevance

At a glance: The STEP trials

Springer Medicine

Abstract

Objectives

Methods

Results

Conclusions

Clinical relevance

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