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Estimation of changes in nickel and chromium content in nickel-titanium and stainless steel orthodontic wires used during orthodontic treatment: An analytical and scanning electron microscopic study.

Kararia V, Jain P, Chaudhary S, Kararia N - Contemp Clin Dent (2015 Jan-Mar)

Bottom Line: The biocompatibility of orthodontic dental alloys has been investigated over the past 20 years, but the results have been inconclusive.There was a significant release of Nickel and Chromium from both group 3 and 4.Group 2 wires released ions significantly more than group 1 (P = 0.0).

View Article: PubMed Central - PubMed

Affiliation: Department of Orthodontics, Government Dental College and Hospital, Jaipur, Rajasthan, India.

ABSTRACT

Introduction: The biocompatibility of orthodontic dental alloys has been investigated over the past 20 years, but the results have been inconclusive. The study compares standard 3 M Unitek nickel-titanium (NiTi) and stainless steel archwires with locally available JJ orthodontics wires. Scanning electron microscope (SEM) study of surface changes and complexometric titration to study compositional change was performed.

Materials and methods: Ten archwires each of group 1-3 M 0.016" NiTi, group 2-JJ 0.016" NiTi, group 3-3 M 0.019" *0.025" SS and group 4-JJ SS contributed a 10 mm piece of wire for analysis prior to insertion in the patient and 6 weeks post insertion. SEM images were recorded at ×2000, ×4000 and ×6000 magnification. The same samples were subjected to complexiometric titration using ethylenediaminetetraacetic acid to gauge the actual change in the composition.

Observations and results: The SEM images of all the archwires showed marked changes with deep scratches and grooves and dark pitting corrosion areas post intraoral use. 3M wires showed an uniform criss-cross pattern in as received wires indicating a coating which was absent after intraoral use. There was a significant release of Nickel and Chromium from both group 3 and 4. Group 2 wires released ions significantly more than group 1 (P = 0.0).

Conclusion: Extensive and stringent trials are required before certifying any product to be used in Orthodontics.

No MeSH data available.


Related in: MedlinePlus

Percentage of Nickel in as received and retrieved 3M SS wire 0.019”*0.025” and JJ Orthodontics SS wire 0.019”*0.025”
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Figure 7: Percentage of Nickel in as received and retrieved 3M SS wire 0.019”*0.025” and JJ Orthodontics SS wire 0.019”*0.025”

Mentions: For group 4R the mean concentration of Nickel was calculated to be 8.582% in the sample with a standard deviation of 0.182% [Graphs 1].


Estimation of changes in nickel and chromium content in nickel-titanium and stainless steel orthodontic wires used during orthodontic treatment: An analytical and scanning electron microscopic study.

Kararia V, Jain P, Chaudhary S, Kararia N - Contemp Clin Dent (2015 Jan-Mar)

Percentage of Nickel in as received and retrieved 3M SS wire 0.019”*0.025” and JJ Orthodontics SS wire 0.019”*0.025”
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4319344&req=5

Figure 7: Percentage of Nickel in as received and retrieved 3M SS wire 0.019”*0.025” and JJ Orthodontics SS wire 0.019”*0.025”
Mentions: For group 4R the mean concentration of Nickel was calculated to be 8.582% in the sample with a standard deviation of 0.182% [Graphs 1].

Bottom Line: The biocompatibility of orthodontic dental alloys has been investigated over the past 20 years, but the results have been inconclusive.There was a significant release of Nickel and Chromium from both group 3 and 4.Group 2 wires released ions significantly more than group 1 (P = 0.0).

View Article: PubMed Central - PubMed

Affiliation: Department of Orthodontics, Government Dental College and Hospital, Jaipur, Rajasthan, India.

ABSTRACT

Introduction: The biocompatibility of orthodontic dental alloys has been investigated over the past 20 years, but the results have been inconclusive. The study compares standard 3 M Unitek nickel-titanium (NiTi) and stainless steel archwires with locally available JJ orthodontics wires. Scanning electron microscope (SEM) study of surface changes and complexometric titration to study compositional change was performed.

Materials and methods: Ten archwires each of group 1-3 M 0.016" NiTi, group 2-JJ 0.016" NiTi, group 3-3 M 0.019" *0.025" SS and group 4-JJ SS contributed a 10 mm piece of wire for analysis prior to insertion in the patient and 6 weeks post insertion. SEM images were recorded at ×2000, ×4000 and ×6000 magnification. The same samples were subjected to complexiometric titration using ethylenediaminetetraacetic acid to gauge the actual change in the composition.

Observations and results: The SEM images of all the archwires showed marked changes with deep scratches and grooves and dark pitting corrosion areas post intraoral use. 3M wires showed an uniform criss-cross pattern in as received wires indicating a coating which was absent after intraoral use. There was a significant release of Nickel and Chromium from both group 3 and 4. Group 2 wires released ions significantly more than group 1 (P = 0.0).

Conclusion: Extensive and stringent trials are required before certifying any product to be used in Orthodontics.

No MeSH data available.


Related in: MedlinePlus