Frictional resistances in stainless steel bracket-wire combinations with effects of vertical defections

Ogata, Randall H.; Nanda, Ram S.; Duncanson, Manville G.; Sinha, Pramod K.; Currier, G. Fräns

doi:10.1016/s0889-5406(96)70139-7

Cited by 91 publications

(71 citation statements)

References 8 publications

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“…The larger contact area between the wire and the slot and the surface texture of the wire surface are factors that can affect the magnitude of frictional forces, in that friction was observed to increase with an increase in wire size. 14 For example, the surface roughness of SS appears to be the smoothest among various wires, followed by NiTi 15 ; TMA seems to produce greater frictional force than is produced by NiTi. 16,17 Kapila et al 4 showed that the wire size-alloy interaction significantly influenced the magnitude of friction, in addition to bracket size (0.022 produced an increase in friction with respect to 0.018 in).…”

Section: Discussionmentioning

confidence: 96%

Friction between Archwires of Different Sizes, Cross-Section and Alloy and Brackets Ligated with Low-Friction or Conventional Ligatures

Tecco

Tetè

Festa

2009

The Angle Orthodontist

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Objective: To test the null hypothesis that no statistically significant difference in frictional resistance is noted when round or rectangular archwires are used in conjunction with low-friction ligatures (small, medium, or large) or conventional ligatures. Materials and Methods: A total of 10 stainless steel brackets, a 0.022-in slot, and various orthodontic archwires, ligated with low-friction ligatures or conventional ligatures, were tested to compare frictional resistance. The archwires employed were 0.014-in and 0.016-in nickel titanium (NiTi), 0.018-in stainless steel (SS), 0.016 ϫ 0.022-in NiTi, 0.016 ϫ 0.022-in SS, 0.017 ϫ 0.025-in titanium molybdenum alloy (TMA), 0.017 ϫ 0.025-in NiTi, 0.017 ϫ 0.025-in SS, 0.019 ϫ 0.025-in SS, and 0.019 ϫ 0.025-in NiTi. Each bracket/archwire combination was tested 10 times in the dry state at an ambient temperature of 34ЊC. Results: Low-friction ligatures with round archwires showed statistically significantly lower frictional resistance than did conventional ligatures. When coupled with 0.016 ϫ 0.022-in NiTi and SS, no statistically significant difference was observed among the four groups. When coupled with 0.017 ϫ 0.025-in archwires, low-friction ligatures showed statistically significantly greater frictional resistance than was seen with conventional ligatures. When coupled with 0.019 ϫ 0.025-in NiTi, low-friction ligatures showed statistically significantly greater frictional resistance than did conventional ligatures, but no difference among the four groups was observed with the 0.019 ϫ 0.025-in SS. No significant difference was assessed among low-friction ligatures of different sizes. Conclusion: Low-friction ligatures show lower friction when compared with conventional ligatures when coupled with round archwires, but not when coupled with rectangular ones. (Angle Orthod. 2009;79:111-116.)

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Section: Discussionmentioning

confidence: 96%

Friction between Archwires of Different Sizes, Cross-Section and Alloy and Brackets Ligated with Low-Friction or Conventional Ligatures

Tecco

Tetè

Festa

2009

The Angle Orthodontist

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“…Therefore, to obtain appropriate tooth movement, the total force will be determined by the optimum force to move the tooth, as well as force needed to overcome friction between the bracket and orthodontic wire. [1][2][3][4] There are situations in which different friction intensities are needed. A low friction coefficient is necessary in cases of retraction of teeth or space closure, whereas for anchorage, a high friction coefficient is more appropriate.…”

Section: Introductionmentioning

confidence: 99%

Frictional resistance of orthodontic wires tied with 3 types of elastomeric ligatures

et al. 2011

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The aims of this study were to determine and compare frictional resistance obtained by low-friction and conventional elastomeric ligatures in the presence of artificial saliva, and observe whether this variable changed after 21 days. Super Slick  low-friction elastomeric ligatures and conventional ligatures of the brands TP conventional  and Unitek  were placed on standard edgewise maxillary central incisor metal brackets, slot .022" × .028" tying rectangular orthodontic wires .018" × .025". Three experimental groups were arranged according to the type of ligature and a control group in which no wires were used. The friction values obtained between the bracket/wire/ligature set were measured using a Universal Test Machine at a speed of 20 mm/minute, at two experimental time intervals: T0 -immediately after specimen fabrication; and T1 -21 days after fabrication and immersion in artificial saliva at 37 o C. Conventional Unitek ligatures and the low-friction ligature (Super Slick) showed the lowest friction values at T0. After 21 days (T1), however, conventional Unitek ligatures presented the lowest value. All groups assessed from T0 to T1 showed a numerical reduction in friction values, suggesting that time, heat and humidity may cause elastic degradation, however this was not verified statistically (P > 0.05).

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“…Além disso, tanto nos níveis mais elevados quanto nos níveis mais baixos de momento aplicado, não houve redução na resistência ao deslize entre os diferentes sistemas de braquetes, independentemente dos arcos estudados (PLISKA; BEYER; LARSON, 2011). Outros estudos também não observaram diferenças na força de atrito entre os diferentes sistemas de braquetes (BEDNAR; GRUENDEMAN;SANDRIK, 1991;HENAO;KUSY, 2004;LOFTUS et al, 1999;OGATA et al, 1996).…”

Section: Lista De Figurasunclassified

“…Além disso, ao relacionarmos a deflexão gradual, testada no presente estudo, com a resistência friccional, testada em inúmeros trabalhos presentes na literatura (O'REILLY et al, 1999;OGATA et al, 1996), observa-se que a força de atrito, para cada combinação braquete/fio testada, aumentava conforme a deflexão do fio era aumentada. LOMBARDO et al, 2012;MALLORY et al, 2004;NUCERA et al, 2014;WILKINSON et al, 2002) Figura 6.12 Fios 0,018" e 0,020" combinados com os braquetes Damon Q e In-Ovation R em todas as deflexões avaliadas (3; 2; 1 e 0,5mm).…”

Section: Temperaturaunclassified

“…Ao relacionarmos a deflexão gradual, testada no estudo citado acima (PETERSEN et al, 2009), com a resistência friccional, testada em inúmeros trabalhos presentes na literatura (O'REILLY et al, 1999;OGATA et al, 1996), observa-se que há uma concordância entre os seus resultados, uma vez que, os autores observam uma maior força de atrito nas combinações dos fio com os braquetes convencionais do que com os autoligáveis (KRISHNAN; KALATHIL; ABRAHAM, 2009;QUEIROZ et al, 2012;HUANG et al, 2012;KHALID;JAYARAM, 2012;PACHECO et al, 2011;VOUDOURIS, 1997;FERRARI et al, 2011).…”

Section: Temperaturaunclassified

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Avaliação da força gerada pela deflexão gradual de fios ortodônticos em braquetes convencionais metálicos, estéticos e autoligáveis

Francisconi¹

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Frictional resistances in stainless steel bracket-wire combinations with effects of vertical defections

Cited by 91 publications

References 8 publications

Friction between Archwires of Different Sizes, Cross-Section and Alloy and Brackets Ligated with Low-Friction or Conventional Ligatures

Friction between Archwires of Different Sizes, Cross-Section and Alloy and Brackets Ligated with Low-Friction or Conventional Ligatures

Frictional resistance of orthodontic wires tied with 3 types of elastomeric ligatures

Avaliação da força gerada pela deflexão gradual de fios ortodônticos em braquetes convencionais metálicos, estéticos e autoligáveis

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