A comparative study of the static and kinetic frictional resistance of titanium molybdenum alloy archwires in stainless steel brackets

Cash, Alexander C; Curtis, Richard; Garrigia-Majo, D; McDonald, Fraser

doi:10.1093/ejo/26.1.105

Cited by 40 publications

(34 citation statements)

References 18 publications

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“…However, even in the final phases of the treatment in which the long-range movements are not the main goal, TMA wire should be carefully used as the results of the present study have shown that its friction is significantly higher than that of SS wire for metallic brackets, a finding also corroborated elsewhere 6,7 . However, when polycarbonate and ceramic brackets are used in combination with TMA wire, the friction coefficient decreases compared to systems using SS wire.…”

Section: Discussionsupporting

confidence: 85%

Friction between different wire bracket combinations in artificial saliva: an in vitro evaluation

et al. 2011

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ObjectiveThe objective this work was to assess the friction coefficient between brackets and wires of different materials under conditions simulating the oral environment.Material and MethodsStainless steel (SS) and titanium-molybdenum alloy (TMA) wires of 0.019x0.025-in diameter (American Orthodontics) and polycarbonate bracket (American Orthodontics), ceramic bracket (American Orthodontics), and metal bracket (3M Unitek) with slots of 0.022x0.030-in were used. The friction coefficient was assessed by means of mechanical traction with the system immersed in artificial saliva. The mean roughness of both wire surface and bracket slots was evaluated by using a surface profilometer.ResultsThe system using TMA wire and polycarbonate bracket had the highest roughness (p<0.05). SS wire with ceramic bracket had the highest friction coefficient, whereas the use of metallic bracket yielded the lowest (p<0.05). However, it was observed a statistically significant difference in the system using TMA wire and ceramic bracket compared to that using TMA wire and polycarbonate bracket (p=0.038).ConclusionCeramic brackets in association with SS wire should be judiciously used, since this system showed a high friction coefficient.

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Section: Discussionsupporting

confidence: 85%

Friction between different wire bracket combinations in artificial saliva: an in vitro evaluation

et al. 2011

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“…[2324] It is suggested that clinicians sterilize TMAL, RES and CNA wires in an autoclave before using them without any worries because their favorable load characteristics will not undergo any changes after sterilization, which is consistent with the results of a study carried out by Pernier et al . on the effect of autoclave sterilization at 134°C or 274°F for 18 minutes on TMA, TMAL and RES wires.…”

Section: Discussionsupporting

confidence: 73%

Effect of dry heat and steam sterilization on load-deflection characteristics of β-titanium wires: An in vitro study

Alavi

Sinaee

2012

Dent Res J

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Background:Sterilization techniques could affect the characteristics of orthodontic wires. The aim of the present study was to evaluate the effect of steam and dry heat sterilization techniques on load-deflection behavior of five types of β-titanium alloy wires.Materials and Methods:The samples consisted of 30 straight lengths of five types of β-titanium alloy wires: Titanium Molybdenum Alloy (TMA) Low Friction (TMAL), TMA Low Friction Colored (HONE), Resolve (RES), BetaForce (BETA), and BETA CNA (CNA). Thirty wire segments were divided into three groups of 10. Group 1 was the control group and the group 2 samples were sterilized by dry heat in an oven (60 minutes at 160°C) and group 3 by steam in an autoclave (15 minutes at 121°C). Then all the wire samples underwent a three-point bending test in a testing machine to evaluate load-deflection properties. Data was analyzed by repeated measures ANOVA and Scheffé's test (α = 0.05).Results:The results showed that dry heat sterilization significantly increased force levels during both loading and unloading of CNA, BETA and RES and during loading of HONE (P < 0.05). Steam sterilization significantly increased force levels during both loading and unloading of BETA and during unloading of HONE (P < 0.05), with no effects on the load-deflection characteristics of TMAL, CNA and RES (P > 0.05).Conclusion:It appears dry heat sterilization increases stiffness of RES, BETA, CNA and HONE but autoclave sterilization did not have any effect on load-deflection characteristics of most of the β-titanium wires tested, indicating that clinicians who want to provide maximum safety for their patients can autoclave TMAL, RES and CNA before applying them.

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“…The result of the present study showed that stainless steel arch wire material provide the lowest friction resistance in wet condition followed by titanium molybdenum alloy (β-titanium TMA), then Nitinol (NiTi), and copper nickel titanium (Cu Ni Ti) which reported the highest friction resistance. Many studies (14,(29)(30)(31)(32)(33)(34)(35)(36)(37)(38)(39)(40)(41) reported the superiority of stainless steel archwires as it was associated with the least amount of friction but followed by Ni Ti while beta titanium exhibited the highest frictional resistance. This was explained by the increased surface roughness of β-titanium wire as compared with stainless steel arch wire as reported by scanning electron microscope and laser spectroscopic picture (26,43) .…”

Section: Discussionmentioning

confidence: 99%

Assessment of friction resistance of four orthodontic arch wires using three ligation methods in dry and wet conditions

Yousif

Karim²

2020

Egyptian Orthodontic Journal

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Aim: Comparison of static and dynamic friction resistance of stainless steel (SS), nickel titanium (NiTi), titanium molybdenum alloy (TMA) and copper nickel titanium (CuNiTi) archwires using three different methods of ligation; St St ligature, Slide low friction elastics and conventional elastics in both dry and wet conditions. Materials and Methods: 144 new orthodontic arch wires were divided according to the alloy type into four groups with 36 archwires for each; group 1: stainless steel (SS), group 2: nickel titanium (NiTi), group 3: titanium molybdenum alloy (TMA) and group 4: copper nickel titanium (CuNiTi). Each group was divided according to the method of ligation into three subgroups with 12 archwires for each; subgroup A: ligated with SS ligature, subgroup B: ligated with Slide low friction elastics and subgroup C: ligated with conventional elastics. Static and kinetic friction resistance was measured using Lloyd Instruments in both dry and wet conditions by adding artificial saliva. Student t-test, ANOVA and LSD's test were used for statistical analysis. Significance level was set at P≤ 0.05. Results: Student t-test showed static and kinetic friction for wet conditions were highly significant lower than dry conditions for the same arch wire/ligature cominations (P<= 0.001). Static and kinetic friction resistance of SS archwires had significantly the least amount of friction followed by TMA then NiTi (Nitinol) and lastly CuNiTi. SS ligature exhibited significantly the least amount of friction followed by Slide low friction elastics while conventional elastics exhibited the greatest amount of friction (P<0.001). Conclusions: Wet conditions are essential for reducing friction in stainless steel bracket/archwire/ligature combinations. Stainless Steel archwire ligated to the SS bracket with SS ligatures exhibited the least amount of static and dynamic friction resistance followed by TMA and then NiTi and CuNiTi in an ascending order. SS ligature showed the least amount of friction followed by Slide elastomers and conventional elastic reported the highest friction resistance.

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A comparative study of the static and kinetic frictional resistance of titanium molybdenum alloy archwires in stainless steel brackets

Cited by 40 publications

References 18 publications

Friction between different wire bracket combinations in artificial saliva: an in vitro evaluation

Friction between different wire bracket combinations in artificial saliva: an in vitro evaluation

Effect of dry heat and steam sterilization on load-deflection characteristics of β-titanium wires: An in vitro study

Assessment of friction resistance of four orthodontic arch wires using three ligation methods in dry and wet conditions

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