Zinc-Oxide Nanocoating for Improvement of the Antibacterial and Frictional Behavior of Nickel-Titanium Alloy

Kachoei, Mojgan; Nourian, Azin; Divband, Baharak; Kachoei, Zahra; Shirazi, Sajjad

doi:10.2217/nnm-2016-0171

Cited by 59 publications

(64 citation statements)

References 43 publications

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“…Nanosilver ascertained to combine good antibacterial effect in the lack of cytotoxicity ( 14 ). The antibacterial effect of nanosilver is due to binding to crucial cellular structure components like enzymes and other proteins, mainly to their SH-groups ( 15 ). Silver ions interfere with the integrity of the bacterial cell, its energy production and preservation ( 5 , 6 , 15 ).…”

Section: Discussionmentioning

confidence: 99%

“…The antibacterial effect of nanosilver is due to binding to crucial cellular structure components like enzymes and other proteins, mainly to their SH-groups ( 15 ). Silver ions interfere with the integrity of the bacterial cell, its energy production and preservation ( 5 , 6 , 15 ). This multilevel antimicrobial mode guarantees that resistance cannot be simply acquired by single point mutations in compare with aminoglycoside antibiotics, where resistance can be acquired much easier ( 14 ).…”

Section: Discussionmentioning

confidence: 99%

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Sealing efficacy of mineral trioxide aggregate with and without nanosilver for root end filling: An in-vitro bacterial leakage study

Eskandarinezhad¹,

Shahveghar-Asl²,

Sharghi³

et al. 2016

J Clin Exp Dent

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BackgroundVarious materials have been added to mineral trioxide aggregate to enhance its properties. This study was aimed to compare the sealing efficacy of MTA with and without nanosilver using bacterial leakage approach.Material and MethodsSeventy canine teeth were prepared and obturated. Then, after apical resection, the root-end cavities were prepared by ultrasonic retrotips. Teeth were randomly divided into 4 groups containing two experimental groups (n=30) and two negative and positive controls (n=5). In group 1 and 2, root-end cavities were respectively filled with MTA and MTA with nanosilver (by 1% weight). Leakage assessment was carried out by bacterial leakage apparatus with Enterococcus faecalis species. Leakage comparison between experimental groups was done using Mann-Whitney test by Spss 16 software at significancy level of 0.05.ResultsThe median bacterial leakages for MTA and MTA with nanosilver were 19 and 2, respectively. The mean bacterial leakages for MTA and MTA with nanosilver were 30.06±28.67 and 9.66±14.25, respectively. Mann-Whitney test indicated that there was a significant difference in bacterial leakage day between two experimental groups (P=0.002).ConclusionsBased on the findings of this in-vitro bacterial leakage study, adding nanosilver to MTA decreased its sealing ability. Key words:Root canal therapy, root canal obturation, root canal filling materials, nanosilver, MTA.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Sealing efficacy of mineral trioxide aggregate with and without nanosilver for root end filling: An in-vitro bacterial leakage study

Eskandarinezhad¹,

Shahveghar-Asl²,

Sharghi³

et al. 2016

J Clin Exp Dent

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“…The cells were incubated at 37°C and 5% CO2 for 4 h and then the media was discarded and dimethyl sulfoxide and Sorenson buffer were added to each well as a solubilizer buffer. Finally, absorbance was read using an ELISA plate reader (BioTeck, Bad Friedrichshall, Germany) at a wavelength of 570nm (17,18). …”

Section: Methodsmentioning

confidence: 99%

“…Post hoc Tukey test was used for pairwise comparisons of the groups (22). Data on cell viability was analyzed with T-test (17). P <0.05 was considered statistically significant.…”

Section: Methodsmentioning

confidence: 99%

Zeolite-silver-zinc nanoparticles: Biocompatibility and their effect on the compressive strength of mineral trioxide aggregate

et al. 2017

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Background This study was carried out to evaluate the biocompatibility of zeolite-silver-zinc (Ze-Ag-Zn) nanoparticles and their effect on the compressive strength of Mineral Trioxide Aggregate (MTA). Material and Methods Biocompatibility was evaluated by an MTT assay on the pulmonary adenocarcinoma cells with 0.05, 0.1, 0.25, 0.5, 1 and 5 mg/mL concentrations of Ze-Ag-Zn. For compressive strength test, four groups containing 15 stainless-steel cylinders with an internal diameter of 4 and a height of 6 mm were prepared and MTA (groups 1 and 2) or MTA + 2% Ze-Ag-Zn (groups 3 and 4) were placed in the cylinders. The compressive strength was evaluated using a universal testing machine 4 days after mixing in groups 1 and 3, and 21 days after mixing in groups 2 and 4. Results There was no significant difference between cytotoxicity of different concentrations. The highest (52.22±18.92 MPa) and lowest (19.57±5.76 MPa) compressive strength were observed in MTA group after 21 days and in MTA + 2% Ze-Ag-Zn group after four days, respectively. The effect of time and 2% Ze-Ag-Zn on the compressive strength were significant (P<0.05). Mixing MTA with Ze-Ag-Zn significantly reduced and passage of time from day four to 21 significantly increased the compressive strength. Conclusions Mixing MTA with 2% Ze-Ag-Zn had an adverse effect on the compressive strength of MTA, but this combination had no cytotoxic effects. Key words:Compressive strength, Cytotoxicity, Mineral Trioxide Aggregate, Nanoparticle, Zeolite-Silver-Zinc.

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“…5 During orthodontic treatment, there is a significant increase in the number of some microorganisms, such as Streptococcus mutans and Lactobacillus acidophilus, 6,7 which have been identified as major pathogens in periodontal diseases and dental caries and increase the risk of declassification. 8 In the past decade, the antibacterial activity of some metal and metal oxide films such as TiO 2 , 9 ZnO, 10 and Ag, 11 has been considered. Among these materials, TiO 2 has gained attention due to its specific properties.…”

Section: Introductionmentioning

confidence: 99%

Effects of TiO2-Coated Stainless Steel Orthodontic Wires on Streptococcus mutans Bacteria: A Clinical Study

Mollabashi¹,

Farmany²,

Alikhani³

et al. 2020

IJN

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Introduction The aim of this study was to clinically evaluate Streptococcus mutans adhesion on titanium dioxide–coated stainless steel orthodontic wires to decrease white-spot formation. Methods In this study, four groups of 17 patients each (n=68) aged 12–25 years participated. A titanium dioxide coating layer was deposited on 0.4572 mm stainless steel orthodontic wires using physical vapor deposition. The coated wires were randomly assigned to one jaw, and the opposite jaw received an uncoated wire as control. Patients were divided into groups according to the duration that wires were in their mouths: A) 1 week, B) 2 weeks, C) 3 weeks, and D) 4 weeks. Block randomization was used to assign patients to each group. At the end of the experiment, 20 mm of each wire (canine-to-canine area) was cut and cultured in S. mutans –specific medium. The culture plates were placed in an incubator containing 5% CO 2 for 72 hours at 37°C, and then colonies were counted. MTT was used to test the biocompatibility of the coated and uncoated wires. To evaluate the stability of the coated titanium dioxide layer on the wires, titanium concentration on the saliva was determined using inductively coupled plasma mass spectroscopy. Results The Kruskal–Wallis test showed that there was no significant difference in colony counts among the coated wires during 1–4 weeks ( p <0.48). In the uncoated-wire groups, colonys count at week 1 were higher than weeks 24 –( p <0.022). Wilcoxon’s test showed that the number of colonies was significantly different in groups A and C, but there was no significant difference in groups B or D. MTT-assay results showed that there was not a significant difference between cell viability in the coated-wire group and the control. The Kruskal–Wallis test showed that there was no significant difference in titanium concentration in the studied groups ( p <0.834). Conclusion Application of titanium dioxide coating is effective in reducing bacterial adhesion at wire insertion.

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Zinc-Oxide Nanocoating for Improvement of the Antibacterial and Frictional Behavior of Nickel-Titanium Alloy

Abstract: This unique coating could be implemented into practice for safer and faster treatment to the benefit of both patient and clinician.

Cited by 59 publications

References 43 publications

Sealing efficacy of mineral trioxide aggregate with and without nanosilver for root end filling: An in-vitro bacterial leakage study

Sealing efficacy of mineral trioxide aggregate with and without nanosilver for root end filling: An in-vitro bacterial leakage study

Zeolite-silver-zinc nanoparticles: Biocompatibility and their effect on the compressive strength of mineral trioxide aggregate

<p>Effects of TiO<sub>2</sub>-Coated Stainless Steel Orthodontic Wires on <em>Streptococcus mutans</em> Bacteria: A Clinical Study</p>

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