Naslov
Influence of intraoral application of antiseptics and fluorides during orthodontic treatment on corrosion and mechanical characteristics of nickel-titanium alloy in orthodontic appliances

Autori
Zibar Belašić, Tihana ; Pejova, Biljana ; Otmačić Ćurković, Helena ; Kamenar, Ervin ; Četenović, Bojana ; Špalj, Stjepan

Izvornik
Angle orthodontist (0003-3219) 91 (2021), 4; 528-537

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
antiseptics ; corrosion ; fluorides ; nickel ; titanium

Sažetak
Objectives: To explore whether the commercial agents recommended for controlling dental biofilm formation had a significant effect in vivo on mechanical and corrosion properties of nickel- titanium (NiTi) alloy. Materials and methods: NiTi archwires (dimensions 0.508 × 0.508 mm) were collected from 36 orthodontic patients aged 13-42 years after a 3- month intraoral exposure. Three experimental groups were formed: (1) subjects conducting regular oral hygiene, (2) subjects who used fluorides for intensive prophylaxis for the first month, and (3) subjects who used chlorhexidine in the same manner. Corrosion behavior, surface characteristics, stiffness, hardness, and friction were analyzed. Results: Exposure to intraoral conditions significantly reduced the stiffness and hardness of the NiTi alloy (P ≤ .015). Fluoride tended to reduce stiffness and hardness more than did saliva or antiseptic, but not significantly. Roughness and friction were not significantly influenced by oral exposure. Intraoral aging predominantly produced general corrosion independent of the adjuvant prophylactic agent, although localized corrosion may also have occurred. Conclusions: Fluorides and the antiseptic chlorhexidine do not increase corrosion more than saliva itself, nor do they further modify the mechanical properties of the NiTi alloy.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Temeljne tehničke znanosti, Dentalna medicina

Napomena
Supported by grants from the Croatian Science
Foundation (No. IP-2014-09-7500 (IMUNODENT) and
IP-2020-02-4027 (DENTALBIOFILM)),
ClinicalTrials.gov Identifier: NCT03334461. Part
of this work was made possible using equipment
funded via the ERDF project (No. RC.2.2.06-0001;
Development of Research Infrastructure at the
University of Rijeka Campus–RISK)

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