Barrier-Test

1996 ◽  
Vol 21 (1) ◽  
pp. 24-28
Author(s):  
Manfred Held
Keyword(s):  
Barrier Test

Evaluation of cytotoxicity of glass ionomer cements by dentin barrier test

2009 ◽  
Vol 25 (5) ◽  
pp. e39
Author(s):  
A. Sengun ◽  
H.E. Botsalı ◽  
M. Yalcın ◽  
F. Ozer ◽  
S.T. Tasdemır ◽  
...  
Keyword(s):  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Barrier Test ◽  
Dentin Barrier Test

Short Apron Drop Tests in Support of Automotive Composites Consortium Focal Project I

1999 ◽  
Author(s):  
Alan L. Browne ◽  
Nancy L. Johnson
Keyword(s):  
Energy Management ◽  
Cross Section ◽  
Full Scale ◽  
Fabric Reinforcement ◽  
Important Contributor ◽  
Barrier Test ◽  
Drop Tests ◽  
The Subject

Abstract This paper documents the short apron drop tests that were conducted in support of ACC Focal Project I. The objective of Focal Project I, which has been successfully completed, was to develop a composite front apron that demonstrated acceptable structural and energy management characteristics while using a manufacturable preform configuration. The purpose of the short apron drop tests described in this paper was to validate various composite apron fabric/reinforcement designs and crush initiation methods in terms of their ability to produce stable progressive crush at acceptable force levels in frontal axial impacts prior to full scale sled, cart, and barrier tests. Most of the design approaches evaluated in these short apron tests were selected on the basis of promising performance in crush tube tests, of both hourglass (apron lower rail) and square-to-rectangular (apron upper rail) cross-section crush tubes. The subject short apron drop tests allowed a full scale check of these concepts on the apron level prior to significantly more expensive and time consuming full scale sled and barrier testing. A total of 17 such drop tests were conducted during the several year duration of Focal Project I, testing in general being in more of an iterative mode where we kept trying to move closer to the desired goal. The fact that these tests proved to be an important contributor to the success of Focal Project I is based on two observations, first the fact that more than one test was necessary, meaning that the first design (and several subsequent iterations) didn’t result in the desired response and second that the final short apron test, which was an unqualified success, gave support for the final successful full scale barrier test.

Cytotoxicity evaluation of dentin bonding agents by dentin barrier test on 3-dimensional pulp cells

2011 ◽  
Vol 112 (3) ◽  
pp. e83-e88 ◽  
Author(s):  
Abdülkadir Şengün ◽  
Muhammet Yalçın ◽  
Hayriye Esra Ülker ◽  
Bora Öztürk ◽  
Sema S. Hakkı
Keyword(s):  
Bonding Agents ◽  
Dentin Bonding ◽  
3 Dimensional ◽  
Dentin Bonding Agents ◽  
Barrier Test ◽  
Pulp Cells ◽  
Dentin Barrier Test

scholarly journals Cytotoxicity Testing of Temporary Luting Cements with Two- and Three-Dimensional Cultures of Bovine Dental Pulp-Derived Cells

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Hayriye Esra Ülker ◽  
Mustafa Ülker ◽  
Hasan Önder Gümüş ◽  
Muhammet Yalçın ◽  
Abdulkadir Şengün
Keyword(s):  
Cell Survival ◽  
Dental Pulp ◽  
Three Dimensional ◽  
T Antigen ◽  
Biologically Active ◽  
Luting Cements ◽  
Cytotoxicity Testing ◽  
Barrier Test ◽  
Cytotoxicity Studies ◽  
Dentin Barrier Test

This study evaluated the cytotoxicity of eugenol-containing and eugenol-free temporary luting cements. For cytotoxicity testing, bovine pulp-derived cells transfected with Simian virus 40 Large T antigen were exposed to extracts of eugenol-containing (Rely X Temp E) and eugenol-free (Provicol, PreVISION CEM, and Rely X Temp NE) temporary luting cements for 24 h. The cytotoxicity of the same materials was also evaluated in a dentin barrier test device using three-dimensional cell cultures of bovine pulp-derived cells. The results of the cytotoxicity studies with two-dimensional cultures of bovine dental pulp-derived cells revealed that cell survival with the extracts of Rely X Temp E, Provicol, PreVISION CEM, and Rely X Temp NE was 89.1%, 84.9%, 92.3%, and 66.8%, respectively. Rely X Temp NE and Provicol showed cytotoxic effects on bovine dental pulp-derived cells (P<0.05). The results of the dentin barrier test revealed that cell survival with the above-mentioned temporary cement was 101.5%, 91.9%, 93.5%, and 90.6%, respectively. None of the temporary luting cements significantly reduced cell survival compared with the negative control in the dentin barrier test (P>0.05). Biologically active materials released from temporary luting cements may not influence the dentine-pulp complex if the residual dentine layer is at least 0.5 mm thick.

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