Assessment of Impact of Fluoride on Mechanical Properties of NiTi and CuNiTi Orthodontic Archwires: An In Vitro Study

Kumar, J.; Kaur, Sukhpreet; Kedia, Neal B; Sonone, Truppti P; Goyal, Manish; Tak, Aditi

doi:10.5005/jp-journals-10024-3329

Cited by 1 publication

(1 citation statement)

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“…8,25,[32][33][34] Another factor to consider is fluoride exposure. Previous studies showed that fluoride affected titanium-containing archwires more, leading to a higher surface roughness due to a decreased corrosion resistance of the archwire, 15,24,[35][36][37] which agrees with our findings. Also, one study found that routine fluoride application affected the mechanical properties of orthodontic archwires containing titanium, 38 which was further explained in another study as being a factor of hydrogen embrittlement of the alloy.…”

Section: Ta B L Esupporting

confidence: 93%

The effect of salbutamol sulphate inhalation (an anti‐asthmatic medication) on the surfaces of orthodontic Archwires

Alemran,

Abbassy,

Bakry

et al. 2023

Orthod Craniofacial Res

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ObjectivesThis study aimed to compare the surface roughness and friction of different orthodontic archwires after exposure to salbutamol sulphate inhalation, an anti‐asthmatic medication.MethodsOrthodontic archwires (stainless‐steel [StSt], nickel‐titanium [NiTi], beta‐titanium [β‐Ti], and copper‐NiTi [Cu‐NiTi]) were equally divided into two groups. The exposed groups were subjected to 20 mg salbutamol sulphate for 21 days and kept in artificial saliva. The control groups were only kept in artificial saliva. Surface changes were visualized using scanning electron microscopy (SEM). The average surface roughness (Ra) was evaluated using atomic force microscopy (AFM), and friction resistance forces were assessed using a universal testing machine. Statistical analyses were performed using t‐tests and ANOVA followed by post hoc tests.ResultsSalbutamol sulphate did not change the surface roughness of StSt and NiTi archwires (p > .05). However, the change in the surfaces of β‐Ti and Cu‐NiTi archwires was significant (p < .001). The frictional forces of exposed StSt, NiTi, and Cu‐NiTi archwires did not change (p > .05). However, the frictional forces of β‐Ti archwires increased significantly after exposure to salbutamol sulphate (p = .021). Brushing with fluoride after exposure to salbutamol sulphate increased the frictional forces of β‐Ti only (p = .002).ConclusionsSalbutamol sulphate inhalation significantly affected the surface texture of β‐Ti and Cu‐NiTi orthodontic archwires and increased the friction of β‐Ti archwires. These deteriorating effects were not detected on the surface of StSt and NiTi archwires. Therefore, we suggest that β‐Ti and copper titanium archwires should be used cautiously in individuals under salbutamol sulphate inhalation treatment.

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