scholarly journals Nickel ion release from stainless steel brackets in chlorhexidine and Piper betle Linn mouthwash

2018 ◽  
Vol 51 (1) ◽  
pp. 5
Author(s):  
Tanti Deriaty ◽  
Indra Nasution ◽  
Muslin Yusuf
Keyword(s):  
Stainless Steel ◽  
High Risk ◽  
Dental Caries ◽  
Orthodontic Treatment ◽  
Artificial Saliva ◽  
Atomic Absorption Spectrophotometry ◽  
Piper Betle ◽  
Ion Release ◽  
Nickel Ion ◽  
Absorption Spectrophotometry

Background: Orthodontist prescribe mouthwash for their patients especially since most of patients do not have a satisfactory oral hygiene and have high risk of dental caries. Stainless steel brackets that exposed by mouthwash may have nickel ion release. Corrosion and nickel ion release can induced allergic reaction and make more friction during orthodontic treatment. Purpose: This study aimed to measure nickel ion release of stainless steel bracket that immersed in chlorhexidine and Piper betle Linn mouthwash. Methods: Thirty-six stainless steel bracket immersed in artificial saliva, chlorhexidine, and Piper betle Linn mouthwash. All brackets stored in incubator for 1, 3, 5, and 7 weeks. Nickel ion release was measured by Atomic Absorption Spectrophotometry (AAS). Results: The results showed a significant differences of nickel ion release in all groups (p<0.05). Conclusion: In conclusion, among the mouthwash, chlorohexidine has the highest nickel ion release from stainless steel brackets, followed with Piper betle Linn mouthwash.

scholarly journals Trimming and pH Effects on Nickel Ion Release from Stainless Trimming and pH Effects on Nickel Ion Release from Stainless Steel Crowns of Primary Teeth Steel Crowns of

2020 ◽  
Vol 27 (3) ◽  
Author(s):  
Milad Arab-Nozari ◽  
◽  
Mohammad Shokrzadeh ◽  
Nastaran Zamehran ◽  
Jamshid Yazdani Charati ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Primary Teeth ◽  
Artificial Saliva ◽  
Atomic Absorption Spectrophotometry ◽  
Ph Effects ◽  
Ion Release ◽  
Nickel Ion ◽  
Nickel Release ◽  
Solution Methods ◽  
Decreasing Ph

Objective: Stainless steel crowns (SSCs) are preformed metal crowns used to restore severely decayed primary teeth. The aim of this study is to evaluate the effects of pH changes and SSC margin trimming on nickel release in artificial saliva solution. Methods: A total of 90 SSCs were divided into three groups and placed in 35 ml of artificial saliva of pH 6.8, 5, and 3.5. Another group consisting 30 SSCs with trimmed margins was placed in saliva of pH 6.8. All SSCs were incubated at 37°C. The concentration of released nickel was assessed on days 1, 7, 14, 21, and 28 by atomic absorption spectrophotometry. Results: The highest concentrations of nickel were released on the first day in all groups. Nickel release increased with decreasing pH, and the differences observed were statistically significant on days 1, 7, 14, and 28. SSC trimming caused a significant increase in nickel release on all days except day 21. Conclusion: The concentration of nickel increased in saliva of low pH. The highest levels of nickel were released with SSC margin trimming because of the loss of integrity of the margins.

scholarly journals Release of nickel ions and changes in surface microstructure of stainless steel archwire after immersion in tomato and orange juice

2021 ◽  
Vol 912 (1) ◽  
pp. 012018
Author(s):  
H F Lubis ◽  
G H Simamora
Keyword(s):  
Stainless Steel ◽  
Orange Juice ◽  
Artificial Saliva ◽  
Tomato Juice ◽  
Surface Microstructure ◽  
Orthodontic Appliances ◽  
Ion Release ◽  
Nickel Ion ◽  
Nickel Ions ◽  
Significant Difference

Abstract Stainless steel archwire is an important component of orthodontic appliances that have the potential to corrode. Consumption of foods and beverages with a low pH, such as fruit-based juices, can trigger the release of nickel ions in stainless steel archwire. This study aimed to determine the difference in the amount of nickel ions release and the surface microstructure of stainless steel archwire after immersed in tomato and orange juice. The sample used is stainless steel archwire with a diameter of 0.016 inches and length of 5 cm immersed in 15 ml of solution and then stored at 37°C in an incubator for 24 hours. The samples were divided into three groups (immersed in tomato juice,orange juice and artificial saliva), each group consisted of 9 samples. The solution was tested using an Inductively Coupled Plasma Mass Spectrometer (ICP-MS) to determine the number of nickel ions released. The archwire surface microstructure was tested using a Scanning Electron Microscope (SEM). The results showed that the average amount of nickel ion release in orange juice is more than tomato juice. There was a significant difference between the amount of nickel ion released and surface microstructure on stainless steel archwire after being immersed in tomato and orange juice.

scholarly journals Robust low friction performance of graphene sheets embedded carbon films coated orthodontic stainless steel archwires

Friction ◽  
2021 ◽  
Author(s):  
Zonglin Pan ◽  
Qinzhao Zhou ◽  
Pengfei Wang ◽  
Dongfeng Diao
Keyword(s):  
Stainless Steel ◽  
Friction Coefficient ◽  
Orthodontic Treatment ◽  
Artificial Saliva ◽  
Carbon Film ◽  
Carbon Films ◽  
Graphene Sheets ◽  
Substrate Bias ◽  
Low Friction ◽  
Substrate Bias Voltage

AbstractReducing the friction force between the commercial archwire and bracket during the orthodontic treatment in general dental practice has attracted worldwide interest. An investigation on the friction and wear behaviors of the uncoated and carbon film coated stainless steel archwires running against stainless steel brackets was systematically conducted. The carbon films were prepared at substrate bias voltages from +5 to +50 V using an electron cyclotron resonance plasma sputtering system. With increasing substrate bias voltage, local microstructures of the carbon films evolved from amorphous carbon to graphene nanocrystallites. Both static and stable friction coefficients of the archwire-bracket contacts sliding in dry and wet (artificial saliva) conditions decreased with the deposition of carbon films on the archwires. Low friction coefficient of 0.12 was achieved in artificial saliva environment for the graphene sheets embedded carbon (GSEC) film coated archwire. Deterioration of the friction behavior of the GSEC film coated archwire occurred after immersion of the archwire in artificial saliva solution for different periods before friction test. However, moderate friction coefficient of less than 0.30 sustained after 30 days immersion periods. The low friction mechanism is clarified to be the formation of salivary adsorbed layer and graphene sheets containing tribofilm on the contact interfaces. The robust low friction and low wear performances of the GSEC film coated archwires make them good candidates for clinical orthodontic treatment applications.

scholarly journals Evaluation of cytotoxicity and corrosion resistance of orthodontic mini-implants

2016 ◽  
Vol 21 (5) ◽  
pp. 39-46 ◽  
Author(s):  
Celha Borges Costa Alves ◽  
◽  
Márcio Nunes Segurado ◽  
Miriam Cristina Leandro Dorta ◽  
Fátima Ribeiro Dias ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Statistical Analysis ◽  
Atomic Absorption ◽  
Artificial Saliva ◽  
Atomic Absorption Spectrophotometry ◽  
Sem Images ◽  
Absorption Spectrophotometry ◽  
Mini Implants ◽  
Vanadium Ions

ABSTRACT Objective: To evaluate and compare in vitro cytotoxicity and corrosion resistance of mini-implants from three different commercial brands used for orthodontic anchorage. Methods: Six mini-implants (Conexão(tm), Neodent(tm) and SIN(tm)) were separately immersed in artificial saliva (pH 6.76) for 30 and 60 days. The cytotoxicity of the corrosion extracts was assessed in L929 cell cultures using the violet crystal and MTT assays, as well as cell morphology under light microscopy. Metal surface characteristics before and after immersion in artificial saliva were assessed by means of scanning electron microscopy (SEM). The samples underwent atomic absorption spectrophotometry to determine the concentrations of aluminum and vanadium ions, constituent elements of the alloy that present potential toxicity. For statistical analysis, one-way ANOVA/Bonferroni tests were used for comparisons among groups with p < 0.05 considered significant. Statistical analysis was carried out with Graph Pad PRISM software Version 4.0. Results: No changes in cell viability or morphology were observed. Mini-implants SEM images revealed smooth surfaces with no obvious traces of corrosion. The extracts assessed by means of atomic absorption spectrophotometry presented concentrations of aluminum and vanadium ions below 1.0 µg/mL and 0.5 µg/mL, respectively. Conclusion: Orthodontic mini-implants manufactured by Conexão(tm), Neodent(tm) and SIN(tm) present high corrosion resistance and are not cytotoxic.

scholarly journals New Bactericide Orthodonthic Archwire: NiTi with Silver Nanoparticles

Metals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 702
Author(s):  
F. Javier Gil ◽  
Eduardo Espinar-Escalona ◽  
Nuria Clusellas ◽  
Javier Fernandez-Bozal ◽  
Montserrat Artes-Ribas ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Martensitic Transformation ◽  
Inductively Coupled Plasma ◽  
Artificial Saliva ◽  
Bacterial Strains ◽  
Ion Release ◽  
Critical Temperatures ◽  
Nickel Ion ◽  
Bacteria Culture ◽  
Nanoparticles Of Silver

A potential new bactericide treatment for NiTi orthodontic archwires based in the electrodeposition of silver nanoparticles on the surface was studied. Twenty-five archwires were treated by electrodeposition, obtaining nanoparticles of silver embedded on the archwire surface. These were evaluated in order to investigate the possible changes on the superelastic characteristics (critical temperatures and stresses), the nickel ion release, and the bacteria culture behavior. The chemical composition was analyzed by Energy Dispersive X-Ray Spectroscopy-microanalysis; the singular temperatures of the martensitic transformation were obtained by a flow calorimeter. Induced martensitic transformation stresses were obtained by mechanical testing apparatus. Nickel ion release was analyzed by inductively coupled plasma-mass spectrometry (ICP-MS) equipment using artificial saliva solution at 37 °C. Bacterial tests were studied with the most used oral bacterial strains: Streptococcus sanguinis and Lactobacillus salivarius. NiTi samples were immersed in bacterial suspensions for 2 h at 37 °C. Adhered bacteria were separated and seeded on agar plates: Tood-Hewitt (TH) and Man-Rogosa-Sharpe (MRS) for S. sanguinis and for L.salivarius, respectively. These were then incubated at 37 °C for 1 day and the colonies were analyzed. The results showed that the transformation temperatures and the critical stresses have not statistically significant differences. Likewise, nickel ion release at different immersion times in saliva at 37 °C does not present changes between the original and treated with silver nanoparticles archwires. Bacteria culture results showed that the reduction of the bacteria due to the presence to the nanoparticles of silver is higher than 90%. Consequently, the new treatment with nanoparticles of silver could be a good candidate as bactericidic orthodontic archwire.

scholarly journals JUMLAH ION KROMIUM (Cr) DAN NIKEL (Ni) KAWAT ORTODONTIK STAINLESS STEEL YANG TERLEPAS DALAM PERENDAMAN SALIVA

e-GIGI ◽  
2015 ◽  
Vol 3 (2) ◽  
Author(s):  
Ciendy O. Jura ◽  
Lydia E. N. Tendean ◽  
P. S. Anindita
Keyword(s):  
Stainless Steel ◽  
Oral Cavity ◽  
Artificial Saliva ◽  
Steel Wire ◽  
Stainless Steel Wire ◽  
Control Group ◽  
Ion Release ◽  
Control Group Design ◽  
Orthodontic Wire ◽  
Experimental Laboratory

Abstract: Orthodontic stainless steel wire is one of the instrument components oftenly used in orthodontic treatment and may persist in the oral cavity for a long period of time. Orthodontic stainless steelwire in the oral cavity can be corrosive in the presence of Cr and Ni ion release which can be harmful to the human body and the stainless steel wire itself. This study aimed to determine the amount of Cr and Ni ions released from the stainless steel orthodontic wire that was immersed in artificial saliva. This was an experimental laboratory study with a posttest only control group design. Samples were analyzed by using a UV-Vis spectrophotometry to determine the released Cr and Ni ions in the saliva. Samples consisted of 4 brands of orthodontic stainless steel wires immersed in artificial saliva for 30 days with a temperature of 370C. Data were analyzed by using a computer program. The results showed that the release of Cr ions in samples A, B, C, and D respectively were: 0.302 ppm, 0.331ppm, 0,311 ppm, and 0.483 ppm meanwhile of Ni ions were 1.930 ppm, 1.778 ppm, 1.654 ppm, and 1.391ppm. Conclusion: The release of Cr and Ni ions varied in each sample of orthodontic stainless steel wire .Keywords: orthodontic stainless steel, Cr, Ni, artificial saliva, UV-Vis spectrophotometryAbstrak: Kawat ortodontik stainless steel merupakan salah satu komponen alat yang sering digunakan dalam perawatan ortodontik dan dapat bertahan dalam rongga mulut untuk jangka waktu yang lama. Kawat ortodontik stainless steel yang berada di dalam rongga mulut dapat mengalami korosi dengan adanya pelepasan ion Cr dan Ni yang bersifat merugikan bagi tubuh manusia dan kawat ortodontik itu sendiri. Penelitian ini bertujuan untuk mengetahui besarnya jumlah pelepasan ion Cr dan Ni dari kawat ortodontik stainless steel yang direndam dalam saliva buatan. Penelitian ini menggunakan metode eksperimental laboratorium dengan rancangan posttest only control group. Sampel diuji dengan menggunakan spektrofotometri UV-Vis untuk mengetahui pelepasan ion Cr dan Ni dalam saliva. Sampel terdiri dari 4 merek kawat ortodontik stainless steel direndam dalam saliva buatan selama 30 hari dengan suhu 370C. Data hasil penelitian dianalisis menggunakan program komputer. Hasil penelitian menunjukkan pelepasan ion Cr pada sampel A, B, C, dan D berturut-turut 0,302 ppm; 0,331 ppm; 0,311 ppm; dan 0,483 ppm sedangkan pelepasan ion Ni 1,930 ppm; 1,778 ppm; 1,654 ppm; dan 1,391 ppm. Simpulan: Pelepasan ion Cr dan Ni bervariasi dari masing-masing sampel kawat ortodontik stainless steel.Kata kunci : Kawat ortodontik stainless steel, Cr, Ni, saliva buatan, spektrofotometri UV-Vis

scholarly journals Smear layer removal and chelated calcium ion quantification of three irrigating solutions

2006 ◽  
Vol 17 (4) ◽  
pp. 306-309 ◽  
Author(s):  
Andre Augusto Franco Marques ◽  
Melissa Andréia Marchesan ◽  
Celso Bernardo de Sousa-Filho ◽  
Yara Teresinha Correa Silva-Sousa ◽  
Manoel D. Sousa-Neto ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Atomic Absorption ◽  
Calcium Ions ◽  
Calcium Ion ◽  
Atomic Absorption Spectrophotometry ◽  
Smear Layer ◽  
Ion Release ◽  
Layer Removal ◽  
Absorption Spectrophotometry ◽  
Scanning Electron

The purpose of this study was to evaluate, by scanning electron microscopy (SEM), smear layer removal and quantify, by atomic absorption spectrophotometry, the amount of calcium ion present in the chelating solutions after their use. Sixteen extracted canines were instrumented using the step-back technique and were assigned to 3 groups according to the irrigating solution used: G1: 1 mL 17% EDTAC between each file; G2: 1 mL 17% CDTA; G3: 1 mL 17% EGTA. The solutions were collected after use. The teeth were cleaved longitudinally, evaluated under SEM and assessed for smear layer by blinded examiners and scored from 1 to 4. In order to quantify calcium ion release, the collected solutions were examined by atomic absorption spectrophotometry. Freidman's test was used for statistical analysis of SEM values and showed that canals irrigated with 17% EDTAC and 17% CDTA had significantly less smear layer throughout the canals than 17% EGTA (p<0.01). For analysis of the collected solutions, Tukey's test was used and showed that EDTAC and CDTA had a greater amount of calcium ions (22.8±7.54 and 60.6±20.67 µg/mL, respectively) compared to EGTA (70.5±14.2 µg/mL) (p<0.01). The association both methodologies may contribute to the understanding of how these solutions act in the root canal.

scholarly journals The Release of Total Metal Ion and Genotoxicity of Stainless Steel Brackets: Experimental Study Using Micronucleus Assay

2016 ◽  
Vol 8 (2) ◽  
pp. 97
Author(s):  
Irene Karlina ◽  
Rahmi Amtha ◽  
Boedi Oetomo Roeslan ◽  
Yuniar Zen
Keyword(s):  
Experimental Study ◽  
Stainless Steel ◽  
Adverse Effects ◽  
Metal Ions ◽  
Metal Ion ◽  
Artificial Saliva ◽  
Micronucleus Assay ◽  
Iron Ion ◽  
Ion Release ◽  
As Toxicity

BACKGROUND: Stainless steel brackets are composed of various metal that may corrode in oral cavity. Corrosion is caused by the release of metal ions such as chromium, nickel, and iron. The release of metal ions can cause adverse effects such as toxicity, allergic, and mutagenicity. To evaluate the biocompatibility of stainless steel brackets, micronucleus assay as one of genotoxicity assay is used in this study. To determine the differences and the correlation of metal ions release and genotoxic activity among three brand stainless steel brackets.METHODS: Three brands of brackets were immersed in artificial saliva for 672 hours and the release of ion chromium, nikel and iron were examined. The cytokynesis block micronucleus assay (CBMN) using lymphocytes was performed as well.RESULTS: The highest metal releasing were nickel, cromium, iron, respectively (30.5, 27.2, 23.4 ppb). There was a significant differences between total nickel and iron ion release among three brand brackets (p=0.04, p=0.02). Genotoxicity of metal ion released was correlated with durration of immersion brackets (p=0.01). Genotoxicity was significant correlated with the release of chromium (p=0.03) and nickel (p=0.01).CONCLUSION: Genotoxicity of stainless steel brackets was influenced by duration of immersion but not influenced by brand brackets. KEYWORDS: genotoxicity, stainless steel brackets, metal ion

Influence of pH Level and Type of Archwire on the Time Bound Release of Nickel Ions from Orthodontic Appliances - An In Vitro Study

2021 ◽  
Vol 10 (29) ◽  
pp. 2162-2165
Author(s):  
Azhar Mohammed ◽  
Crystal Runa Soans ◽  
Shivananda S. ◽  
Yatishkumar S. Joshi ◽  
Junaid Junaid ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Metal Ions ◽  
Artificial Saliva ◽  
Orthodontic Appliances ◽  
Ion Release ◽  
Nickel Ions ◽  
Clinical Scenarios ◽  
Nickel Release ◽  
Oral Environment

BACKGROUND Orthodontic metallic appliances in the oral cavity are constantly in contact with biological fluids or tissues thereby releasing particulate masses. They can be common causes of contact allergies and should be considered as a critical issue in determining properties of biomaterials. Nickel ions in various forms and compounds have been known to cause carcinogenic, mutagenic, cytotoxic and allergenic reactions. Pattern of metal ions released from different stainless steel orthodontic appliances in vitro could provide valuable information to consider their application in clinical scenarios. The purpose of the present study was to evaluate metal ions released under different ph levels, immersion period time and using different archwire orthodontic appliances. METHODS Orthodontic appliances were constructed consisting of five brackets from central incisor to the second premolar, a buccal tube welded molar band and an archwire that were used as samples. Total of twelve appliances were constructed; using stainless steel, Ni - Ti, and Thermal Ni - Ti wires (N = 4 each). Half of these samples were immersed in artificial saliva at pH 3.5 and the other half were immersed in artificial saliva at pH 6.75. The samples were stored in an incubator at a temperature of 37 degrees Celsius. Saliva samples from these bottles were collected at the end of 1, 7, 14 and 28 days and subjected to spectrophotometric analysis for estimation of nickel content. RESULTS Nickel release was maximum during the first week of immersion from orthodontic appliances comprising of Ni - Ti wires compared to Stainless steel and thermal Ni - Ti. A gradual decline in the nickel release was observed in the subsequent weeks. Ion release was increased by 30 times in the acidic pH medium, as compared to neutral pH conditions. CONCLUSIONS There is a definite release of nickel ions from orthodontic appliances when exposed to oral environment; however, the amounts are much lower than the daily dietary intake and don’t pose risk of toxicity. Care should be taken in patients with nickel hypersensitivity and wires such as beta - titanium or epoxy coated wires can be substituted. As there is an increase in ion release under acidic conditions the patients need to maintain hygienic oral environment thereby limiting corrosion of appliances. KEY WORDS NitiAlloy, Archwires, pH, Hypersensitivity

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