In Vitro Corrosion Resistance of Orthodontic Super Stainless Steel Wire

2002 ◽  
Vol 149 (9) ◽  
pp. B387
Author(s):  
Keun-Taek Oh ◽  
Chung-Ju Hwang ◽  
Yong-Soo Park ◽  
Kyoung-Nam Kim
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Steel Wire ◽  
Stainless Steel Wire

In Vitro Corrosion Resistance of Orthodontic Super Stainless Steel Wire

2002 ◽  
Vol 149 (9) ◽  
pp. B414 ◽  
Author(s):  
Keun-Taek Oh ◽  
Chung-Ju Hwang ◽  
Yong-Soo Park ◽  
Kyoung-Nam Kim
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Steel Wire ◽  
Stainless Steel Wire

Comparison of Chemical Properties and Ni Release of Stainless Steel and Nickel Titanium Wires

2014 ◽  
Vol 884-885 ◽  
pp. 560-565 ◽  
Author(s):  
Wassana Wichai ◽  
Niwat Anuwongnukroh ◽  
Surachai Dechkunakorn
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Artificial Saliva ◽  
Steel Wire ◽  
Nickel Titanium ◽  
The Other ◽  
Stainless Steel Wire ◽  
Niti Wire ◽  
Titanium Wire ◽  
Niti Wires

Objective: This study aimed to determine the composition and corrosion resistance of stainless steel and nickel titanium (NiTi) archwires and to compare Ni released from simulated standard fixed orthodontic appliances ligated with stainless steel and NiTi wires in artificial saliva at pH 5.14 and pH 6.69. in 4 weeks at 37oC. Materials and Method: Two commercial rectangular wires, 0.016 x 0.022 in size were studied, one Ormco stainless steel wire and another Ormco nickel titanium wire. Their composition was analyzed by an energy disporsive X-ray spectrometer (ESC) and their corrosion resistance was evaluated by a potentiodynamic polarization technique. For Ni release, the twenty-eight simulated fixed appliance sample sets were used, each corresponding to one half-maxillary arch. The samples were divided in 2 groups (14 sets per group). The first one was ligated to Ormco stainless steel archwires and the other one to Ormco NiTi archwires with elastomeric ligatures. Half sets of each group were immersed in 50 ml artificial saliva at pH 5.14 and the other half were immersed at pH 6.69. Ni release was quantified using flame atomic absorption spectrophotometry. Statistical analysis of variance (t-test) was determined on days 1, 4, 7, 9, 14, 21 and 28 comparing the amount of Ni released between groups. Results: Stainless steel wire was composed of Ni, Cr, Si, Mn and Fe while the nickel titanium wire was composed of Ti, Ni and Cr. NiTi wire has more percentage of Ni and therefore has less corrosion resistance than stainless steel wire. For Ni release, stainless steel and NiTi continuously increased at the time intervals for both pH levels. For group one, stainless steel wire had more Ni release at pH 5.14 and for the other group, NiTi wire had more Ni-release at pH 6.69. At 4 weeks, the Ni release of one half-maxillary arch was 1.383 ppm (1383 μg/l) at pH 5.14 and 1.079 ppm (1078 μg/l) at pH 6.69 for stainless steel wire while it was 1.221 ppm (1221 μg/l) at pH 5.14 and 1.267 ppm (1267μg/l) at pH 6.69 for NiTi wire. No significant difference was found in the amount of Ni release from stainless steel and NiTi wires at pH 5.14 and pH 6.69 in the different time intervals except on day 1 wherein the stainless steel archwire was significantly different (p<0.05) at pH 5.14 and pH 6.69. Conclusions: The NiTi wire had more Ni contain and less corrosion resistance than stainless steel wire. Stainless steel had more Ni release at pH 5.14 than pH 6.69 but NiTi had greater Ni release at pH 6.69 than pH 5.14.

Comparison of Properties between General Purpose Stainless Steel Wire and Commercial Orthodontic Stainless Steel Wire

2011 ◽  
Vol 378-379 ◽  
pp. 706-710 ◽  
Author(s):  
Niwat Anuwongnukroh ◽  
Surachai Dechkunakorn ◽  
Pornkiat Churnjitapirom ◽  
Ekkapot Sukhanun ◽  
Tunwa Intrarasuksanti ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Steel Wire ◽  
Nickel Content ◽  
Chemical Properties ◽  
Surface Characteristics ◽  
General Purpose ◽  
Stainless Steel Wire ◽  
Steel Wires

In Thailand, commercial orthodontic stainless steel wires are imported from overseas and expensive. However, lower cost general purpose stainless steel wires, the same type and number as commercial orthodontic stainless steel wires may be used for orthodontic purposes. Objective: This study aimed to determine the physical, mechanical and chemical properties of general purpose stainless steel wire compared with commercial orthodontic stainless steel wires. Materials and Method: Two commercial orthodontic stainless steel wires (Ormco and Highland) and general purpose stainless steel wire (SUS 304H) were evaluated. The physical and mechanical properties were studied according to ISO 15841:2006 and corrosion resistance was studied according to ISO 10271:2001. Surface characteristics and composition were studied by scanning electron microscope (SEM) and electron probe micro analyzer, respectively. Results: The experiment indicated that SUS 304H had the diameter and mechanical properties in the range of orthodontic stainless steel wires. The surface characteristics SUS 304H were similar from observation by SEM magnifications but SUS 304H had lower corrosion resistance due to lower nickel content. The composition confirmed that the three samples wires were genuine type 304. Conclusion: SUS 304H properties are comparable to commercial orthodontic wire properties.

scholarly journals The Effect of Mouthwashes on the Corrosion Resistance of Stainless Steel Wire

2017 ◽  
Vol 39 (2) ◽  
pp. 59
Author(s):  
Mohamed Abdul Sattar Al saqer ◽  
Wael Abd Al-Razzaq Al-Waeli
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Steel Wire ◽  
Stainless Steel Wire

scholarly journals Torque Expression in Stainless Steel Orthodontic Brackets

2010 ◽  
Vol 80 (1) ◽  
pp. 201-210 ◽  
Author(s):  
Amy Archambault ◽  
Ryan Lacoursiere ◽  
Hisham Badawi ◽  
Paul W. Major ◽  
Jason Carey ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Steel Wire ◽  
Orthodontic Brackets ◽  
Stainless Steel Wire ◽  
Measuring Device ◽  
Measuring Devices ◽  
Orthodontic Wire ◽  
Engagement Angle ◽  
Slot Size

Abstract Objective: To evaluate the quantitative effects on torque expression of varying the slot size of stainless steel orthodontic brackets and the dimension of stainless steel wire, and to analyze the limitations of the experimental methods used. Materials and Methods: In vitro studies measuring torque expression in conventional and self-ligating stainless steel brackets with a torque-measuring device, with the use of straight stainless steel orthodontic wire without second-order mechanics and without loops, coils, or auxiliary wires, were sought through a systematic review process. Results: Eleven articles were selected. Direct comparison of different studies was limited by differences in the measuring devices used and in the parameters measured. On the basis of the selected studies, in a 0.018 inch stainless steel bracket slot, the engagement angle ranges from 31 degrees with a 0.016 × 0.016 inch stainless steel archwire to 4.6 degrees with a 0.018 × 0.025 inch stainless steel archwire. In a 0.022 inch stainless steel bracket slot, the engagement angle ranges from 18 degrees with a 0.018 × 0.025 inch stainless steel archwire to 6 degrees with a 0.021 × 0.025 inch stainless steel archwire. Active stainless steel self-ligating brackets demonstrate an engagement angle of approximately 7.5 degrees, whereas passive stainless steel self-ligating brackets show an engagement angle of approximately 14 degrees with 0.019 × 0.025 inch stainless steel wire in a 0.022 inch slot. Conclusions: The engagement angle depends on archwire dimension and edge shape, as well as on bracket slot dimension, and is variable and larger than published theoretical values. Clinically effective torque can be achieved in a 0.022 inch bracket slot with archwire torsion of 15 to 31 degrees for active self-ligating brackets and of 23 to 35 degrees for passive self-ligating brackets with a 0.019 × 0.025 inch stainless steel wire.

Does prestretching stainless-steel wire have any clinical significance?

1991 ◽  
Vol 49 (10) ◽  
pp. 1074-1078
Author(s):  
Richard H. Haug ◽  
Jon P. Bradrick ◽  
Marilyn Su
Keyword(s):  
Stainless Steel ◽  
Clinical Significance ◽  
Steel Wire ◽  
Stainless Steel Wire
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