| Autor: |
Hussain, Saba F., Asshaari, Afifah Adilah, Babu Osman, Bibi Aisiah, AL-Bayaty, Fouad Hussain, bt Amir, Amalina |
| Předmět: |
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| Zdroj: |
Journal of International Dental & Medical Research; 2017, Vol. 10 Issue 1, p76-83, 8p, 4 Black and White Photographs, 4 Charts, 2 Graphs |
| Abstrakt: |
This study aims to evaluate the chemical and structural changes of metallic orthodontic brackets in vitro biodegradation process in artificial saliva. A total of 240 metallic orthodontic brackets of two different manufacturers were used, American orthodontic (LG Stainless-Steel (AISI 316L), USA) and Dentaurum (equilibirium@mini, Stainless- Steel, Germany) divided into control groupimmersed in distilled water and experimental group and immersed in artificial saliva for a period of 28 days at 37°C under mechanical agitation. The release of ions concentrations determinedusing inductively coupled plasma mass (ICP) spectrometry before and after 1, 7 and 28 days of immersion. Energy Dispersive X-ray (EDX) spectroscopyperformed to detect changes in chemical compositions. More aggressive chemical and structural changes were apparent in AO orthodontic brackets after 28 daysimmersion in artificial saliva. In general, the biodegradation was increased proportionally with duration of immersion of brackets, the total mean value of ions release in AO (mean=31.04) is higher than in Dentaurum (mean=2.704) particularly nickel ions.The release of ions in tested orthodontic brackets showed a statistically significant difference with P=0.04. All tested orthodontics brackets in artificial saliva showed less resistant to biodegradation and more obvious in AO bracketsthat might be associated with thetype of stainless steel used by the manufacturer. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
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