scholarly journals Effect of Argon Plasma on Root Dentin after Use of 6% NaOCl

2016 ◽  
Vol 27 (1) ◽  
pp. 41-45 ◽  
Author(s):  
Maíra do Prado ◽  
Rafael Nigri Roizenblit ◽  
Laura Villela Pacheco ◽  
Carlos Augusto de Melo Barbosa ◽  
Carolina Oliveira de Lima ◽  
...  
Keyword(s):  
Free Energy ◽  
Plasma Treatment ◽  
Surface Free Energy ◽  
Argon Plasma ◽  
Control Group ◽  
Ftir Analysis ◽  
Root Canal Sealer ◽  
Dentin Surface ◽  
Ah Plus ◽  
Root Dentin

Abstract The aim of this study was to evaluate the effect of argon plasma on dentin surface after use of 6% NaOCl. Sixty bovine incisors had their crowns removed, the roots split, and the segments planed. One hundred twenty segments of the cervical third were used. The samples were divided in two groups (n=60): Control group: immersed in 6% NaOCl, washed, dried and then immersed in 17% EDTA, washed and dried and Argon group: after treatment described for the Control group, non-thermal argon plasma was applied for 30 s. Ten samples were evaluated by scanning electron microscopy in each group. Other ten samples were analyzed by Fourier transform infrared spectroscopy (FTIR). Thirty samples were analyzed with a goniometer to measure the contact angle between the dentin surfaces and solutions, to determine the surface free energy. The last ten samples were used to evaluate the wettability of AH Plus sealer. Data were statistically analyzed using Kruskal Wallis and Mann-Whitney tests (p<0.05). The results of this study showed that argon plasma did not modify the surface topography. FTIR analysis showed chemical modifications after plasma treatment. Argon plasma increased the surface free energy of dentin and AH Plus wettability. In conclusion, argon plasma treatment modified chemically the dentin surface. This treatment increased the surface free energy and wettability of an epoxy resin root canal sealer, favoring its bonding to dentin surfaces.

scholarly journals Investigation of Surface Free Energy for PTFE Polymer by Bipolar Argon Plasma Treatment

2012 ◽  
Vol 02 (02) ◽  
pp. 132-136 ◽  
Author(s):  
S. M. Pelagade ◽  
N. L. Singh ◽  
R. S. Rane ◽  
S. Mukherjee ◽  
U. P. Deshpande ◽  
...  
Keyword(s):  
Free Energy ◽  
Plasma Treatment ◽  
Surface Free Energy ◽  
Argon Plasma

scholarly journals Influence of ethanol on dentin roughness, surface free energy, and interaction between AH Plus and root dentin

2018 ◽  
Vol 32 (0) ◽  
Author(s):  
Carlos Augusto de Morais Souto Pantoja ◽  
Diogo Henrique da Silva ◽  
Adriana de Jesus Soares ◽  
Caio Cezar Randi Ferraz ◽  
Brenda Paula Figueiredo de Almeida Gomes ◽  
...  
Keyword(s):  
Free Energy ◽  
Surface Free Energy ◽  
Roughness Surface ◽  
Ah Plus ◽  
Root Dentin

The influence of X-rays on the stability of selected properties of polyethylene

2018 ◽  
Vol 23 (1) ◽  
pp. 3-11
Author(s):  
Anna Wiśniewska ◽  
Gabriela Chwalik ◽  
Sylwia Łagan
Keyword(s):  
Free Energy ◽  
Surface Free Energy ◽  
Living Organism ◽  
Degradation Process ◽  
Material Surface ◽  
Control Group ◽  
X Rays ◽  
X Ray ◽  
The Stability

The evaluation of a degradation process of polyethylene (PE) in in vitro conditions under the influence of X-rays (X) and an in-cubation in two solutions simulating the environment of a living organism (SBF – simulated body fluid) was carried out. A dose corresponding to 10 standard X-ray pictures of the skeletal system as well as Ringer's and saline solutions at 40°C were used in the study. The paper presents the results of the influence of the 12-month studies on the selected surface properties of the material: surface wettability and abrasiveness. The value of surface free energy (SFE) was determined on the basis of the wetting angle measurements. The conductivity of the incubation fluids was also analyzed. The obtained results indicate that the adopted dose of X-ray radiation has no significant effect on the wettability of the surface of polyethylene. The nature of the surface layer of polyethylene did not change as a result of the 12-month incubation and remained hydrophilic. For the samples incubated in both immersion fluids, a decrease in surface free energy (SFE) was observed. For both the irradiated material and the control group, no significant changes in the mass of the samples and the conductivity of the incubation fluids were found, which indicates the stability of polyethylene. However, the abrasion value increased by approximately 26%. With the passage of the incubation time, a decrease in the value of this parameter was observed for the polyethylene subjected to radiation. No significant changes were found for the control group.

scholarly journals Adhesion capacity of bioceramic and resin-based root canal sealer to root dentin: an integrative review

2020 ◽  
Vol 77 ◽  
pp. 1
Author(s):  
Carolyne De Pinho Quintão ◽  
Sabrina Teixeira Pinto Costa ◽  
Mariane Floriano Lopes Santos Lacerda ◽  
Caroline Felipe Magalhães Girelli ◽  
Carolina Oliveira De Lima
Keyword(s):  
Root Canal ◽  
Web Of Science ◽  
Integrative Review ◽  
Root Canal Sealer ◽  
Ah Plus ◽  
Root Dentin

Objetivo: comparar a capacidade de adesão do cimento biocerâmico EndoSequence BC e do cimento resinoso AH Plus através de uma revisão integrativa. Material e Métodos: os bancos de dados online Medline/PubMed, Scopus, Web of Science e BVS foram utilizados para a revisão da literatura. Os critérios de elegibilidade incluíram artigos disponíveis na íntegra nas bases de dados pesquisadas, em inglês, e o conteúdo referente à adesão do cimento Endosequence BC sealer em comparação ao AH Plus. Resultados: foram encontrados 45 artigos. Após a remoção duplicada, 22 artigos foram selecionados. Após a leitura dos resumos, textos completos e aplicação dos critérios de inclusão, foram incluídos no total oito artigos. Em relação à capacidade de adesão dos cimentos testados, o AH Plus apresentou melhor adesão do que o cimento BC sealer em três artigos e menor adesão em dois artigos. Força de adesão semelhante foi observada entre os grupos em três estudos. Conclusões: com base nos estudos incluídos, o AH Plus apresenta maior resistência de união quando comparado ao BC Sealer

Surface Free Energy Modification of PET by Plasma Treatment—Influence on Adhesion

1993 ◽  
Vol 42 (4) ◽  
pp. 249-254 ◽  
Author(s):  
R. Cueff ◽  
G. Baud ◽  
J. P. Besse ◽  
M. Jacquet ◽  
M. Benmalek
Keyword(s):  
Free Energy ◽  
Plasma Treatment ◽  
Surface Free Energy

scholarly journals Influence of Low-Pressure RF Plasma Treatment on Aramid Yarns Properties

Molecules ◽  
2020 ◽  
Vol 25 (15) ◽  
pp. 3476
Author(s):  
Alicja Nejman ◽  
Irena Kamińska ◽  
Izabela Jasińska ◽  
Grzegorz Celichowski ◽  
Małgorzata Cieślak
Keyword(s):  
Weight Loss ◽  
Free Energy ◽  
Radio Frequency ◽  
Plasma Treatment ◽  
Surface Free Energy ◽  
Low Pressure ◽  
Rf Plasma ◽  
Polar Component ◽  
Specific Strength ◽  
Dispersion Component

The aim of the study was to modify the surface free energy (SFE) of meta- (mAr) and para-aramid (pAr) yarns by their activation in low-pressure air radio frequency (RF) (40 kHz) plasma and assessment of its impact on the properties of the yarns. After 10 and 90 min of activation, the SFE value increased, respectively, by 14% and 37% for mAr, and by 10% and 37% for pAr. The value of the polar component increased, respectively by 22% and 57% for mAr and 20% and 62% for pAr. The value of the dispersion component for mAr and pAr increased respectively by 9% and 25%. The weight loss decreased from 49% to 46% for mAr and 62% to 50% for pAr after 90 min of activation. After 90 min, the specific strength for mAr did not change and for pAr it decreased by 40%. For both yarns, the 10 min activation in plasma is sufficient to prepare their surface for planned nanomodification.

Plasma treatment of heat treated beech wood – investigation on surface free energy

Holzforschung ◽  
2008 ◽  
Vol 62 (4) ◽  
Author(s):  
Arndt Wolkenhauer ◽  
Georg Avramidis ◽  
Holger Militz ◽  
Wolfgang Viöl
Keyword(s):  
Free Energy ◽  
Plasma Treatment ◽  
Surface Free Energy ◽  
Beech Wood ◽  
Heat Treated

scholarly journals Surface free energy analysis for bipolar pulsed argon plasma treated polymer films

2010 ◽  
Vol 208 ◽  
pp. 012107 ◽  
Author(s):  
S Pelagade ◽  
N L Singh ◽  
Sejal Shah ◽  
Anjum Qureshi ◽  
R S Rane ◽  
...  
Keyword(s):  
Free Energy ◽  
Surface Free Energy ◽  
Polymer Films ◽  
Energy Analysis ◽  
Argon Plasma ◽  
Free Energy Analysis
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