Ion release and surface changes of nickel–titanium archwires induced by changes in the pH value of the saliva—significance for human health risk assessment

Jusufi Osmani, Zana (avtor), Poljšak, Borut (avtor), Zelenika, Saša (avtor), Kamenar, Ervin (avtor), Marković, Kristina (avtor), Perčić, Marko (avtor), Katić, Višnja (avtor)

The aim of this study was to explore whether changes in the salivary pH influence mechanical properties, surface roughness, and ion release from NiTi archwires with various surface coatings, and discuss the clinical significance of the findings. The uncoated, rhodium-coated, and nitrified NiTi wires were immersed into artificial saliva of different pH values (4.8, 5.1, 5.5, and 6.6). Released nickel and titanium ions were measured with inductively coupled plasma-optical emission spectroscopy at the end of 28 days. Atomic force microscopy was used to measure the arithmetic average surface roughness R$_a$, the root-mean-square roughness R$_q$, and the maximum height of the asperities R$_Z$. The nanoindentation hardness (H$_{IT}$) and Young’s modulus (E$_{IT}$) measurements were performed. The change in the pH of artificial saliva is inversely proportional to the release of titanium from both coated and uncoated wires, and the release of nickel from uncoated wires. The surface roughness parameters of both coated and uncoated wires are unaffected by the change in the pH of artificial saliva. The change in the pH of saliva has minor influence on the hardness and Young’s modulus of elasticity of both coated and uncoated wires. The concentration of released metal ions measured was below the recommended upper limit for daily intake; nevertheless, hypersensitivity effects cannot be excluded, even at lower concentrations and at low pH.

• Jezik: Angleški jezik
• Ključne besede: nickel hypersensitivity, orthodontic wires, surface coating, surface roughness
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: ZF - Zdravstvena fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2022
• Št. strani: 11 str.
• Številčenje: Vol. 15, iss. 6, art. 1994
• PID: 20.500.12556/RUL-135410
• UDK: 620.1:616.314-089.23
• ISSN pri članku: 1996-1944
• DOI: 10.3390/ma15061994
• COBISS.SI-ID: 100569859
• Datum objave v RUL: 11.03.2022

Gradivo je del revije

• Naslov: Materials
• Skrajšan naslov: Materials
• Založnik: MDPI
• ISSN: 1996-1944
• COBISS.SI-ID: 33588485

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 08.03.2022

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: preobčutljivost na nikelj, ortodontske žice, površinski premaz, hrapavost površine

Projekti

• Financer: Drugi - Drug financer ali več financerjev
• Program financ.: University of Rijeka
• Številka projekta: uniri-biomed-18-71