Effect of fluoride mouth rinses on various orthodontic archwire alloys tested by modified bending test: An in vitro study

Srivastava, Kamna; Chandra, Pavan Kumar; Kamat, Nandini V

doi:10.4103/0970-9290.102253

Cited by 9 publications

(9 citation statements)

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“…Mechanical properties of stainless steel orthodontic archwires can be influenced by a variety of causes, for example, corrosion [ 4 , 5 ]. Electrolytic corrosion of orthodontic appliances in the mouth regularly occurs due to the wet oral environment [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

“…Corrosive damage to archwires can result in deterioration of its mechanical properties. Limited studies have been performed to investigate the influence of corrosion on mechanical properties of stainless steel archwires [ 4 , 5 , 11 ]. The corrosion phenomenon may not only influence the mechanical properties of the orthodontic archwires but also affect surface properties, such as the surface roughness and surface texture [ 7 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

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Synergistic effect of wire bending and salivary pH on surface properties and mechanical properties of orthodontic stainless steel archwires

Hobbelink

et al. 2015

Prog Orthod.

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BackgroundThe aim of this study was to investigate the corrosive behaviour of stainless steel archwires in a more clinically relevant way by bending and exposing to various pH.MethodsOne hundred and twenty pieces of rectangular stainless steel wires (0.43 × 0.64 mm) were randomly assigned into four groups. In each group, there were 15 pieces of bent wires and 15 straight ones. Prior to measurements of the wires, as individual experimental groups (group 1, 2, and 3), the wires were exposed to artificial saliva for 4 weeks at pH 5.6, 6.6, and 7.6, respectively. A control group of wires (group 4) remained in air for the same period of time before sent for measurements. Surface roughness (Ra-value) was measured by a profilometer. Young’s modulus and maximum force were determined by a four-point flexural test apparatus. Scanning electron microscopy was used to observe the surface morphology of straight wire. Differences between groups were examined using a two-way analysis of variance (ANOVA).ResultsMean surface roughness values, flexural Young’s moduli, and maximum force values of bent wires are significantly different from those of the straight wires, which was the main effect of wire bending, ignoring the influence of pH. A significant effect was found between Ra-values regarding the main effect of pH, ignoring the influence of shape. There was a significant interaction effect of bending and pH on flexural Young’s moduli of stainless steel archwires, while pH did not show much impact on the maximum force values of those stainless steel wires. Bigger surface irregularities were seen on SEM images of straight wires immersed in artificial saliva at pH 5.6 compared to artificial saliva at other pH values. Surface depth (Rz) was more sensitive than Ra in revealing surface roughness, both measured from 3D reconstructed SEM images. Ra showed a comparable result of surface roughness to Ra-value measured by the profilometer.ConclusionsBending has a significant influence on surface roughness and mechanical properties of rectangular SS archwires. pH plays a synergistic effect on the change of mechanical properties of stainless steel (SS) wires along with wire bending.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synergistic effect of wire bending and salivary pH on surface properties and mechanical properties of orthodontic stainless steel archwires

Hobbelink

et al. 2015

Prog Orthod.

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“…therapy is common, hence orthodontists often recommend prophylactic use of fluoride containing mouthwash to mitigate it. 6,7 There is current evidence to link use of fluoride mouthwashes and increase in the leaching of Ni and Cr ions from NiTi archwires. 8 Fluoridated mouthwashes are commercially available in two strengths, sodium fluoride 0.05 % for daily use and sodium fluoride 0.2% for weekly use, and both are equally effective for prophylactic use.…”

Section: Development Of Dental Caries During Orthodonticmentioning

confidence: 99%

“…A table-top tensile testing apparatus was used to measure the ultimate tensile strength. This apparatus is a miniature version of Universal testing machine (UTM), which is previously used in researches 7.…”

mentioning

confidence: 99%

“…6 The corrosion behaviour of NiTi wire in presence of fluoride can be attributed to either an increase in hydrogen ion concentration intra-orally or the nature of fluoride as an accelerator ion. Further, in an active state and acidic environment, release of Ni ions occurs intraorally which can cause corrosion and lead to reductionin the tensile strength of orthodontic archwires 6,7,20,27. A study by Heravi et al6 concluded that use of fluoridated mouth rinses destroys the surface of SS wires.…”

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confidence: 99%

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In Vivo Comparison of Ultimate Tensile Strength of Nickel-Titanium Aligning Archwires Exposed to Fluoridated Mouthwash

Keerthana¹,

Chitra²,

Puneeth

et al. 2020

Orthod J Nepal

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Introduction: Orthodontists usually prescribe fluoridated mouthwash to their patients to mitigate risk of dental caries. These mouthwashes may alter the mechanical properties of archwires by dissolving the protective oxide-layer. The aim of the study was to examine the effects of fluoridated mouthwash on ultimate tensile strength of NiTi wires after three months of intra-oral use. Materials & Method: Sixty 0.014” (0.36mm) Nickel-titanium (NiTi) wires (Ormco Corp, Glendora, USA) were divided into three groups: Group A: as-received archwires serving as controls, Group B: intra-oral used wires exposed to placebo mouthwash and Group C: intra-oral used wires exposed to fluoridated mouthwash for a period of 3 months. Each wire was subjected to tensile testing using a table-top tensile testing apparatus. Ultimate tensile strength data was analysed with one-way analysis of variance (ANOVA) and Tukey testing at the 0.05 level of significance. Result: Results showed that amongst tested wires, those exposed to fluoridated mouthwash had least tensile strength (79.45 ± 1.33 N) as compared to wires exposed to placebo mouthwash (99.95 ± 0.91 N) and those in the control group (117.69 ± 0.66 N). The results were statistically significant at p <0.001. Conclusion: Ultimate tensile strength was least for wires exposed to fluoridated mouthwashes for a period of 3 months. Non-fluoridated mouthwashes can be used during the initial phase of leveling and aligning with NiTi wires.

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Effect of use of antiseptics and fluorides during orthodontic treatment on working properties of NiTi archwires in levelling dental arches

et al. 2023

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Effect of fluoride mouth rinses on various orthodontic archwire alloys tested by modified bending test: An in vitro study

Abstract: Phosflur and a neutral sodium fluoride mouth rinse did not affect the mechanical bending properties of Ni-Ti, copper Ni-Ti, B-Ti, and SS wires in in vitro conditions.

Cited by 9 publications

References 0 publications

Synergistic effect of wire bending and salivary pH on surface properties and mechanical properties of orthodontic stainless steel archwires

Synergistic effect of wire bending and salivary pH on surface properties and mechanical properties of orthodontic stainless steel archwires

In Vivo Comparison of Ultimate Tensile Strength of Nickel-Titanium Aligning Archwires Exposed to Fluoridated Mouthwash

Effect of use of antiseptics and fluorides during orthodontic treatment on working properties of NiTi archwires in levelling dental arches

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