In vitro study of frictional forces during sliding mechanics of “reduced-friction” brackets

Redlich, Meir; Mayer, Yaniv; Harari, Doron; Lewinstein, Israel

doi:10.1016/s0889-5406(03)00238-5

Cited by 89 publications

(105 citation statements)

References 15 publications

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“…Dental movement is not a continuous event, but it takes place at very slow speeds and for very short distances. [13][14][15] Therefore, in this study, we considered it more relevant to evaluate static frictional forces than dynamic frictional ones.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of frictional forces between ceramic brackets and archwires of different alloys compared with metal brackets

et al. 2010

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The aim of this study was to evaluate, in vitro, frictional forces produced by ceramic brackets and arch wires of different alloys. Frictional tests were performed on three ceramic brackets: monocrystalline (Inspire ICE), polycrystalline (InVu), polycrystalline with metal slot (Clarity), and one stainless steel bracket (Dyna-Lock). Thirty brackets of each were tested, all with .022" slots, in combination with stainless steel and nickel-titanium wires .019" × .025", at 0° and 10° angulation, in artificial saliva. Arch wires were pulled through the slots at a crosshead speed of 10 mm/min. There were statistically significant differences between the groups of brackets and wires studied (p < .05). The polycrystalline brackets with metal slots had values similar to those of conventional polycrystalline brackets, and the monocrystalline brackets had the highest frictional forces. The nickel-titanium wires produced the lowest friction. The addition of metal slots in the polycrystalline brackets did not significantly decrease frictional values. Nickel-titanium wires produced lower friction than those of stainless steel.

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Section: Discussionmentioning

confidence: 99%

Evaluation of frictional forces between ceramic brackets and archwires of different alloys compared with metal brackets

et al. 2010

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“…on the skill of the clinician, who should monitor the mechanical forces that stimulate biological responses in the periodontium 5,6 .…”

Section: Introductionmentioning

confidence: 99%

Evaluation of friction produced by self-ligating, conventional and Barbosa Versatile brackets

Barbosa

Elias

Basting

2016

Rev. odontol. UNESP

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ResumoIntrodução: O bráquete Barbosa Versátil apresenta um desenho que pode promover menor resistência friccional e maior deslize. No entanto, nenhum estudo in vitro avaliou seu mecanismo de deslize e resistência ao atrito, mesmo quando comparado com outros bráquetes autoligados ou convencionais. Objetivo: Comparar a resistência ao atrito entre bráquetes autoligados (EasyClip/ Aditek, Damon MX/ Ormco e In Ovation R/ GAC), convencionais (Balance Roth/ GAC, and Roth Monobloco/ Morelli) e o bráquete Barbosa Versátil (Barbosa Versatile/ GAC) com diferentes angulações e fios. Material e método: Os bráquetes foram avaliados com fios de aço inox 0.014", 0.018", 0.019"×0.025" e 0.021"×0.025", com angulações de 0, 5, 10, 15 e 20 graus. Amarrias foram realizadas com ligaduras elastoméricas para os bráquetes convencionais e para o Barbosa Versátil, enquanto que se utilizou o sistema de fechamento próprio para os bráquetes autoligados. A máquina de teste universal foi utilizada para as avaliações de resistência ao atrito entre os bráquetes e fios. Resultado: ANOVA em esquema fatorial 4 × 5 × 6 (bráquetes × angulação × fios) e o teste de Tukey mostraram que houve diferenças significativas para todos os fatores e interações (p<0,0001). Houve menor resistência ao atrito para o bráquete Barbosa Versátil e maior para os bráquetes Roth Monobloco e Balance. Conclusão: Menor resistência ao atrito foi obtida com o bráquete Barbosa Versátil e com os autoligados em comparação com os bráquetes convencionais. O aumento do diâmetro dos fios aumenta a resistência ao atrito. Menores angulações promovem menor resistência ao atrito.Descritores: Fricção; fios ortodônticos; bráquetes ortodônticos. Abstract Introduction:The Barbosa Versatile bracket design may provide lower frictional force and greater sliding. However, no in vitro studies have shown its sliding mechanisms and frictional resistance, particularly in comparison with other self-ligating or conventional brackets. Objective: To compare the frictional resistance among self-ligating brackets (EasyClip/ Aditek, Damon MX/ Ormco and In Ovation R/ GAC); conventional brackets (Balance Roth/ GAC, and Roth Monobloc/ Morelli); and Barbosa Versatile bracket (Barbosa Versatile/ GAC) with different angles and arch wires. Material and method: Brackets were tested with the 0.014", 0.018", 0.019"×0.025" and 0.021"×0.025" stainless steel wires, with 0, 5, 10, 15 and 20 degree angulations. Tying was performed with elastomeric ligature for conventional and Barbosa Versatile brackets, or with a built-in clip system of the self-ligating brackets. A universal testing machine was used to obtain sliding strength and friction value readouts between brackets and wires. Result: Three-way factorial ANOVA 4×5×6 (brackets × angulation × wire) and Tukey tests showed statistically significant differences for all factors and all interactions (p<0.0001). Static frictional resistance showed a lower rate for Barbosa Versatile bracket and higher rates for Roth Monobloc and Balance brackets. Conclusion: The lowest frict...

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“…This eventually results in increase in the frictional forces thus also increasing the coefficient of friction. 8 Redilich et al 7 has reported that higher frictional forces are developed when either wire size or bracket-wire angulation increase. The study was performed in a dry test set-up with only one stainless steel bracket.…”

Section: Discussionmentioning

confidence: 99%

“…Static friction is the force required to produce the initial movement and it is always stronger than the kinetic force that keeps the body in motion. 6,7 Tooth movement along an arch-wire is not continuous but occurs in a series of intermittent movements. Static friction in this context is considered to have a greater importance in orthodontic applications because it needs to be overcome with movement of each tooth.…”

mentioning

confidence: 99%

“…3,15 During the last decade, various in-vitro techniques have been used to describe the frictional behaviour of archwire-bracket combinations. 7,8,19 The most frequently used in-vitro test set-up was the one developed by Kusy and Whitley. 20 The authors investigated friction between brackets and arch-wires under different environmental and mechanical conditions in a universal testing machine either in the dry or wet state.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Effect of dental arch convexity and type of archwire on frictional forces

Fourie

Özcan

Sandham

2009

American Journal of Orthodontics and Dentofacial Orthopedics

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In vitro study of frictional forces during sliding mechanics of “reduced-friction” brackets

Cited by 89 publications

References 15 publications

Evaluation of frictional forces between ceramic brackets and archwires of different alloys compared with metal brackets

Evaluation of frictional forces between ceramic brackets and archwires of different alloys compared with metal brackets

Evaluation of friction produced by self-ligating, conventional and Barbosa Versatile brackets

Effect of dental arch convexity and type of archwire on frictional forces

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