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VOLUME 19 , ISSUE 8 ( 2018 ) > List of Articles

ORIGINAL RESEARCH

Ions release Evaluation and Changes in Mini-implant Orthodontic Surface

Marcelo K Suzuki, Danielle AR Martins, Marília T Costa, Andreia C Ferreira, Flavio AC Ferreira

Keywords : Artificial saliva, Dental implants, Immersion, In vitro techniques, Ions, Laboratory research.

Citation Information : Suzuki MK, Martins DA, Costa MT, Ferreira AC, Ferreira FA. Ions release Evaluation and Changes in Mini-implant Orthodontic Surface. J Contemp Dent Pract 2018; 19 (8):910-917.

DOI: 10.5005/jp-journals-10024-2356

License: CC BY-NC 3.0

Published Online: 01-03-2018

Copyright Statement:  Copyright © 2018; The Author(s).


Abstract

Aim: To evaluate, in vitro, the mini-implant surface changes and the release of ions after immersion in artificial saliva during follow-up of 60 and 120 days. Materials and methods: As for the surface features, examined in a scanning electron microscope (SEM), before and after immersion in artificial saliva, there was a rough and uneven surface, suggestive of corrosion areas for the two trademarks evaluated after 120 days of immersion. The extracts generated in artificial saliva analysis were submitted to energy dispersive spectroscopy to identify the solid corrosion products produced on the surfaces of miniscrews. Results: Both SIN miniscrews and Neodent brands were observed to release minimal quantities of silver ions, chromium, iron, nickel, titanium, and vanadium. Regarding titanium, this index varied from 88.84% in the control group of Neodent brand, and 91.29% in the control group of SIN brand. For the aluminum content, the quantities ranged from 4.91% in group immersed for 60 days in Neodent brand to 8.71% for the SIN control group. Considering vanadium, the index ranged from 2.65% in the group immersed for 120 days to 4.53% in the control group, both for Neodent brand. Statistically significant differences in iron ion were observed between the control group and the miniscrews brand SIN after 60 and 120 days and for Neodent after 60 days of immersion. The titanium ions suffered statistically significant decrease for both brands after 120 days of storage when compared with the control group. Conclusion: The studied miniscrews showed results consistent with the biosafety of alloys for use, in vivo. Clinical significance: The knowledge of the physical/chemical state of corrosion products released in the oral cavity is very important for the toxicological assessment of metal alloys used in dental miniscrews.

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