Correlation between frictional force and surface roughness of orthodontic archwires

Choi, Samjin; Hwang, Eun-Young; Park, Hun-Kuk; Park, Young-Guk

doi:10.1002/sca.21225

Cited by 24 publications

(22 citation statements)

References 25 publications

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“…The results of the present study showed that the highest surface roughness was noted with Tefloncoated NiTi, followed by NiTi and CuNiTi, while the lowest surface roughness was noted for SS. These findings are in accordance with previous studies 16,26,27 which demonstrated that SS showed the lowest frictional coefficient and the lowest sliding resistance when used in passive configuration, which could be attributed its low roughness, high hardness and high strength. On the other hand, these data are in contrast with those of Farronato G et al 28 and Husmann et al 29 who detected that Teflon coated wires generated lower frictional forces compared to their corresponding uncoated wires.…”

Section: Discussionsupporting

confidence: 93%

Effect of thermocycling on surface roughness and springback properties of different orthodontic arch wires: An in vitro comparative study

Shamaa

Ghorab

2019

Egyptian Dental Journal

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Objective: Comparative evaluation of surface roughness and springback properties of stainless steel (SS), nickel-titanium (NiTi), copper nickel-titanium (CuNiTi) and Teflon-coated NiTi orthodontic archwires before and after thermocycling. Materials and Methods: A total number of 360 specimens were utilized in this study. For each type of wire, specimens were divided into three groups as follow; Group 1 (control): as-received archwires, Groups 2 and 3: specimens were subjected to thermocycling (500 cycles and 1000 cycles, respectively). Surface roughness (Ra) was determined by using a profilometer. Flexural modulus of elasticity (E) and yield strength (YS) of the wires were measured using a three-point bending test in a universal testing machine. The springback ratio (YS/E) was calculated for each wire. Data were statistically analyzed using ANOVA and Bonferroni post hoc tests (α=.05). Results: For all types of wire, the highest surface roughness was noted with 1000 cycles, followed by 500 cycles and the lowest surface roughness was detected in control group. No significant difference in surface roughness between control and 500 TC group was detected for all types of wire. After thermocycling, the highest surface roughness was noted in Teflon coated NiTi, followed by CuNiTi and NiTi and the lowest values was detected in SS. There was a significant difference in the springback ratio after thermocycling regimens for SS, NiTi and Teflon coated NiTi only (P < 0.001). Conclusion: The thermocycling process can induce changes in surface roughness and springback properties of orthodontic archwires. Stainless steel archwire displayed the least amount of surface roughness after thermocycling and we recommend its utilization in sliding mechanics to reduce friction during orthodontic tooth movement. In spite of higher surface roughness of NiTi-based archwires, the properties of higher springback and wide range of action make them appropriate choices for the clinicians during various stages of orthodontic treatment.

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Section: Discussionsupporting

confidence: 93%

Effect of thermocycling on surface roughness and springback properties of different orthodontic arch wires: An in vitro comparative study

Shamaa

Ghorab

2019

Egyptian Dental Journal

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“…Lateral force microscopy (LFM) is an AFM technique that is used to identify the relative difference in surface friction. LFM is also known as friction force microscopy, as it measures the lateral bending of the cantilever depending on the frictional force acting on the tip 15. During scanning in the contact mode, the cantilever not only bends in the vertical direction along the surface as a result of repulsive Van der Waals interactions, but also undergoes lateral deformation.…”

Section: Introductionmentioning

confidence: 99%

Surface analysis of metal clips of ceramic self-ligating brackets

et al. 2019

Self Cite

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ObjectiveThe aim of this study was to analyze the surface composition, roughness, and relative friction of metal clips from various ceramic self-ligating brackets.MethodsSix kinds of brackets were examined. The control group (mC) consisted of interactive metal self-ligating brackets while the experimental group (CC, EC, MA, QK, and WA) consisted of interactive ceramic self-ligating brackets. Atomic force microscopy-lateral force microscopy and scanning electron microscopy-energy-dispersive X-ray spectroscopy were used to analyze the surface of each bracket clip.ResultsAll the clips in the experimental groups were coated with rhodium except for the QK clip. The results showed that the QK clip had the lowest average roughness on the outer surface, followed by the MA, EC, WA, and CC clips. However, the CC clip had the lowest average roughness on the inner surface, followed by the QK, WA, MA, and EC clips. The QK clip also had the lowest relative friction on the outer surface, followed by the MA, EC, CC, and WA clips. Likewise, the CC clip had the lowest relative friction on the inner surface, followed by the QK, WA, MA, and EC clips.ConclusionsThe surface roughness and relative friction of the rhodium-coated clips were generally higher than those of the uncoated clips.

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“…This positive correlation suggests that surface roughness can be used as an evaluation marker, in place of the direct measurement of FF, when estimating the efficiency of orthodontic treatment. 17 The SEM evaluation showed that the Ti-Ni and Ti-Nb alloy wires had smoother surfaces than the Ti-Mo alloy wire, which had a rough surface with abundant scratches. These results were consistent with those for the FF of the three alloy wires.…”

Section: Discussionmentioning

confidence: 97%

In vitro evaluation of frictional force of a novel elastic bendable orthodontic wire

Takada

Nakajima

Kuroda

et al. 2018

The Angle Orthodontist

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Correlation between frictional force and surface roughness of orthodontic archwires

Cited by 24 publications

References 25 publications

Effect of thermocycling on surface roughness and springback properties of different orthodontic arch wires: An in vitro comparative study

Effect of thermocycling on surface roughness and springback properties of different orthodontic arch wires: An in vitro comparative study

Surface analysis of metal clips of ceramic self-ligating brackets

In vitro evaluation of frictional force of a novel elastic bendable orthodontic wire

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