Evaluation of frictional resistance and surface characteristics after immersion of orthodontic brackets and wire in different chemical solutions: A comparative in vitrostudy

Nanjundan, Kavitha; Vimala, G

doi:10.4103/0970-9290.195641

Cited by 15 publications

(13 citation statements)

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“…He stated that the change in the LFM-acquired frictional resistance was similar to that of the AFM-acquired surface roughness. Nanjundan and Vimala18 concluded that a significant positive correlation was observed between the frictional force, bracket slot roughness, and wire roughness. The results of the present experiment are consistent with those of Choi et al15 and Nanjundan and Vimala 18…”

Section: Discussionmentioning

confidence: 98%

Surface analysis of metal clips of ceramic self-ligating brackets

et al. 2019

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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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Section: Discussionmentioning

confidence: 98%

Surface analysis of metal clips of ceramic self-ligating brackets

et al. 2019

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“…Surface roughness can affect the amount of friction that occurs during orthodontic treatment, although the influence of the surface roughness of the wire arc also plays a role. 9 Choosing a bracket with a good surface roughness is very important, but the process of making a bracket by the factory is not always perfect because there are still grooves and marks on the surface of the bracket slot. 1 Standardisation by the International Organization for Standardization (ISO) is crucial as a guide for manufacturing brackets by manufacturers.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the basic surface roughness of an ISO-certified and non-ISO-certified slot bracket with an atomic force microscope

et al. 2019

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Introduction:The base surface roughness of slot bracket can affect friction in tooth movement. There are ISO-certified and non-ISO-certified stainless steel brackets on the market. Thus orthodontists must be careful in choosing the right bracket. This study was aimed to evaluate the differences of the surface roughness of ISO-certified and non-ISO-certified Roth 0.022 inch stainless steel bracket with the parameter of S a (average roughness). Methods: This research was a laboratory observational. Samples were taken randomly as many as 32 brackets divided into two groups, each consisted of two bracket brands. Surface roughness measurements were performed using an atomic force microscope (AFM), then the data were analysed by ANOVA test (p < 0.05) and Post-Hoc analysis. Results: The ISO-certified bracket has an S a value smaller than the non-ISO-certified bracket. There was a significant difference in the surface roughness of the ISO-certified and non-ISO-certified slot bracket base (p < 0.05). Conclusion: The ISOcertified bracket has a smoother base surface than the non-ISO-certified bracket base.

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“…They demonstrated higher static and kinetic frictional forces in the Pepsi group and the greatest surface roughness. 27 However, the limitation of the latter study is that it was conducted after continuous 24-hour exposure to the acidic solution, whereas intraoral pH levels rather oscillate than remain constant.…”

Section: Discussionmentioning

confidence: 99%

The effect of simulated erosive conditions on the frictional behavior of different orthodontic bracket-wire combinations

2019

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Background. Frictional resistance is an important parameter in orthodontics that influences the effectiveness of archwire-guided tooth movement. Since the consumption of dietary acids has increased considerably over the last 2 decades, there is a rationale for investigating the process of degradation of orthodontic materials in an acidic environment and its effect on clinical efficiency. Objectives. The aim of this study was to evaluate the effect of simulated erosive conditions on the frictional behavior between the brackets of 3 different materials and 3 different wire alloys. Material and methods. Three types of twin orthodontic brackets (stainless steel (SS), monocrystalline ceramic and titanium) and 3 types of archwires of the same dimension (SS, nickel-titanium (Ni-Ti) and beta-titanium (titanium-molybdenum alloy-TMA) were tested in 9 different combinations under simulated erosive and non-erosive conditions (18 groups, n = 10). Bracket-wire specimens in the erosive-condition groups were subjected to a pH cycling regimen with 1% citric acid and artificial saliva for 5 consecutive days. Bracket-wire specimens from the non-erosive-condition groups were incubated only in artificial saliva for 5 days. Static and kinetic friction were determined by measuring the force needed to move the wire through the bracket. A three-way analysis of variance and pairwise comparisons with the Student-Newman-Keuls test were performed. Results. Irrespective of the conditions, SS brackets with SS wire demonstrated significantly lower mean static and kinetic frictional resistance than other bracket-wire combinations (p < 0.01). Ceramic and titanium brackets generated high frictional forces with all 3 types of wire tested. Erosive conditions did not significantly influence static and kinetic frictional resistance in all bracket-wire groups. Conclusions. Erosive conditions do not affect the frictional behavior of SS, Ni-Ti and TMA orthodontic archwires at a clinically significant level.

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Evaluation of frictional resistance and surface characteristics after immersion of orthodontic brackets and wire in different chemical solutions: A comparative in vitrostudy

Abstract: Findings may have long-term implications when acidic food substances are used during fixed orthodontic treatment. Further, in vivo studies are required to analyze the clinical effect of acidic mediums in the oral environment during orthodontic treatment.

Cited by 15 publications

References 1 publication

Surface analysis of metal clips of ceramic self-ligating brackets

Surface analysis of metal clips of ceramic self-ligating brackets

Evaluation of the basic surface roughness of an ISO-certified and non-ISO-certified slot bracket with an atomic force microscope

The effect of simulated erosive conditions on the frictional behavior of different orthodontic bracket-wire combinations

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