Influences of archwire size and ligation method on the force magnitude delivered by nickel-titanium alloy archwires in a simulation of mandibular right lateral incisor linguoversion

Tochigi, Keisuke; Oda, Souichiro; Arai, Kazuhito

doi:10.4012/dmj.2014-270

Cited by 14 publications

(7 citation statements)

References 18 publications

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“…A multi-sensor measurement system [ 19 , 20 ] with six load cells connected to stainless steel blocks that simulate the position of the mandibular bilateral central incisors, canines, and first molars was used to measure the orthodontic forces delivered to the 0.022-inch slot bracket (Damon Q, Ormco Corporation, Glendora, CA). Then, the positions of all stainless steel blocks were adjusted by micrometers (Fig.…”

Section: Methodsmentioning

confidence: 99%

“…Recent in vitro studies have used simulation systems with three-dimensional six-axis force sensors to accurately detect the orthodontic force delivered by preformed archwires to the brackets attached to each tooth of a dental arch [18][19][20]. These simulation systems have been utilized to evaluate the magnitude and direction of orthodontic forces in three-dimensional space to investigate simulations of cases of labially displaced maxillary canines [18] or lingually displaced mandibular lateral incisors [20].…”

Section: Introductionmentioning

confidence: 99%

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Impact of the prefabricated forms of NiTi archwires on orthodontic forces delivered to the mandibular dental arch

et al. 2021

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Background Although preformed archwires with a variety of arch forms are currently commercially available, the effects of variation in the shape of these archwires on the orthodontic force at each tooth are not well understood. Therefore, we evaluated the forces delivered by various types of commercially available preformed nickel–titanium alloy (NiTi) archwires in a simulated mandibular dental arch. Methods Sixty-three types of 0.019 × 0.025-inch preformed NiTi archwires from 15 manufactures were selected for analysis. The intercanine width (ICW) and intermolar width (IMW) of each archwire were measured at the mean canine and first molar depths of 30 untreated subjects with normal occlusions. Each archwire was placed in a multi-sensor measurement system simulating the mandibular dental arch of subjects with normal occlusions, and orthodontic forces in the facial-lingual direction at the central incisors, canines, and first molars were measured. Correlations between the ICW, IMW, and ICW/IMW ratio of archwires and the delivered forces were analyzed. The archwires were classified into the following four groups according to the ICW and IMW: Control group, ICW and IMW are within the means ± standard deviations of the normal ranges; Ovoid group, narrow ICW and IMW; Tapered group, narrow ICW; and Square group, narrow IMW. The forces were compared among these groups for each tooth. Results Significant correlations between the measured archwire width and force to each tooth were found, except between IMW and forces at the central incisors and canines. Significant differences in the forces were found among all groups, except between the Ovoid and Tapered groups at all teeth and between the Ovoid/Tapered and Control groups at the first molar. Significantly greater orthodontic forces in the facial direction were delivered at the central incisors by the archwires in the Ovoid and Tapered groups when compared with the archwires in the other groups. Conclusion These findings suggest that there is a possible risk of a clinically significant level of unfavorable orthodontic force being delivered to the mandibular incisors in labial inclination when using a preformed archwire with an ICW that is narrower than the dental arch.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact of the prefabricated forms of NiTi archwires on orthodontic forces delivered to the mandibular dental arch

et al. 2021

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“…The nickel-titanium archwires are considered the most attractive wires to orthodontists during the first stage of orthodontic treatment owing to their unique property of releasing light continuous forces with a wide range of activation [1]. This property could be affected by two major factors; the first one is the generation of NiTi wires and their diameter [2][3][4], while the second factor is the method of ligating the wire to the bracket [5,6]. Elastomeric modules and short metal ligatures are the most common components used to ligate the archwires to the bracket [7].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Elastic and Metallic Ligation Methods on the Unloading Forces for Three Different Types of Nickel-Titanium Archwires Inserted Into Metallic Brackets: An In-vitro Study

Al-Horini¹,

Baba²,

Hajeer³

et al. 2022

Cureus

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Introduction: One of the unique properties of the nickel-titanium (NiTi) archwires is the release of light continuous forces with a wide range of activation, which is affected by the method of ligating the wire to the bracket. Both elastomeric modules and metallic ligatures are the most common components to ligate the archwire to the bracket. This study aimed to evaluate the effect of elastomeric versus metallic ligatures on the released forces of three types of rectangular 0.016- by 0.022-inch NiTi wires. Materials and Methods: This investigation evaluated three different situations of ligating the NiTi archwires to metallic brackets. The produced forces by these wires were evaluated using a modified three-point bending test (a universal testing machine: Testometric 350M ® , Instron, Lincoln Close, Rochdale, England). A 0.022-inch slot-size premolar bracket was used for this investigation with zero torque and zero angulation (Master Series®, American Orthodontics, Sheboygan, USA). The first situation involved no ligation to the metallic brackets using three types of NiTi wires, whereas the second situation (the elastic ligation) involved the use of colored elastomeric modules with a 0.045-inch inner diameter and a 0.115-inch outer diameter (Color Ligatures ® , American Orthodontics, Sheboygan, USA) to ligate the archwire into the metallic bracket's slot. In the third situation (metallic ligation), stainless steel metallic ligatures with a 0.012-inch (Preformed Ligature Wire ® , American Orthodontics, Sheboygan, USA) were used to perform the ligation. The employed NiTi wires were 0.016 x 0.022-inch in diameter (American Orthodontics ® , Sheboygan, Wisconsin, USA), and they were of three different types: (1) the superplastic wires (NT3-SE ® ), the thermally activated wires at 25°C (Thermal Ti-D ® ), and the thermally activated wires at 35°C (Thermal Ti-Lite ® ). Results: The thermally activated wires at 35°C (Thermal Ti-Lite ® ) recorded the lowest force levels for the three ligation methods, while the highest result appeared with the superelastic type (NT3-SE ® ) and the thermally activated type at 25°C (Thermal Ti-D ® ) which showed a varied force for different ligation methods. Regarding the three different NiTi wires used, the elastic and metallic ligation increased the force levels for the superelastic type (NT3-SE ® ) over non-ligation by 50% and 110%, respectively, whereas the elastic ligation raised only the forces for the thermal types (Thermal Ti-D ® and Thermal Ti-Lite ® ) by 75% and 22%, respectively. Both thermally activated types (Thermal Ti-D ® and Thermal Ti-Lite ® ) released forces in the elastic ligation method greater than that o...

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“…T-loop is widely used to close gap between teeth due to the structural characteristics that can generate horizontal, vertical and torsional force [ 9 , 10 , 11 , 12 , 13 ]. During the process of closing gap, the teeth are subjected to both the orthodontic force generated by the T-loop and the biological resistance of the periodontal tissues [ 14 , 15 , 16 ]. In turn, the orthodontic force generated by the archwire are inextricably linked to the clearance distance, cross-sectional size and material properties of the T-loop [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Establishment, FEM analysis and experimental validation of tooth movement prediction model of orthodontic archwire T-loop

et al. 2022

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Background The T-loop has been used clinically to close gap between teeth. And it is a typical orthodontic archwire bending method. However, the design of the T-loop parameters for different patients is based on the clinical experience of the dentists. The variation in dentists' clinical experience is the main reason for inadequate orthodontic treatment, even high incidence of postoperative complications. Methods Firstly, the tooth movement prediction model is established based on the analysis of the T-loop structure and the waxy model dynamic resistance. As well as the reverse reconstruction of the complete maxillary 3D model based on the patient CBCT images, the oral biomechanical FEM analysis is completed. A maxillary waxy dental model is manufactured to realize the water-bath measurement experiment in vitro mimicking the oral bio-environment. Thus, the calculated, simulation and experimental data are obtained, as well as obtaining a cloud of total deformation from the simulation analysis. Results The growth trend of the 11 sets of simulation data is the same as that of the experimental data. And all of them show that the tooth displacement is positively correlated with the cross-sectional size of the archwire, and the clearance distance. As well as the higher Young's modulus of the archwire material, the greater the tooth displacement. And the effect of archwire parameters on tooth displacement derived from simulation and experimental data is consistent with the prediction model. The experimental and calculated data are also compared and analyzed, and the two kinds of data are basically consistent in terms of growth trends and fluctuations, with deviation rates ranging from 2.17 to 10.00%. Conclusions This study shows that the accuracy and reliability of the tooth movement prediction model can be verified through the comparative analysis and deviation calculation of the obtained calculated, simulation and experimental data, which can assist dentists to safely and efficiently perform orthodontic treatment on patients. And the FEM analysis can achieve predictability of orthodontic treatment results.

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Influences of archwire size and ligation method on the force magnitude delivered by nickel-titanium alloy archwires in a simulation of mandibular right lateral incisor linguoversion

Cited by 14 publications

References 18 publications

Impact of the prefabricated forms of NiTi archwires on orthodontic forces delivered to the mandibular dental arch

Impact of the prefabricated forms of NiTi archwires on orthodontic forces delivered to the mandibular dental arch

The Effect of Elastic and Metallic Ligation Methods on the Unloading Forces for Three Different Types of Nickel-Titanium Archwires Inserted Into Metallic Brackets: An In-vitro Study

Establishment, FEM analysis and experimental validation of tooth movement prediction model of orthodontic archwire T-loop

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