Mechanical properties of different esthetic and conventional orthodontic wires in bending tests

Alobeid, Ahmad; Dirk, Cornelius; Reimann, Susanne; El‐Bialy, Tarek; Jäger, Andreas; Bourauel, Christoph

doi:10.1007/s00056-016-0078-5

Cited by 11 publications

(8 citation statements)

References 22 publications

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“…From the measured values, the forces and moments on incisor 21 were larger than those of on incisor 11, which implies severer dislocation on incisor 21. The magnitude of forces and moments were in good agreement with previous studies [ 27 ], and also closed to frequently-used clinical orthodontic forces of 100 g and 150 g [ 28 ].…”

Section: Discussionsupporting

confidence: 88%

Biomechanical investigation of orthodontic treatment planning based on orthodontic force measurement and finite element method before implementation: A case study

Liu

Zhang

et al. 2018

THC

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BACKGROUND: Orthodontic treatment planning (OTP) is primarily depended on clinical experiences of orthodontists at present, while equivocal OTP would increase the possibility of treatment failure.OBJECTIVE: The objective was to investigate a methodology for quantitatively evaluating OTP, using theoretical analyses, orthodontic forces measurement (OFM) and finite element method (FEM).METHODS: An OTP was theoretically designed based on a clinical case and forces on incisors in OTP were measured on a specialized platform. Further, FEM simulations were performed on the designed OTP and control group. At last, an 18-month tracking was carried out to observe treatment effects of the designed OTP.RESULTS: The moving tendencies of incisors were in keeping with ideal treatment from the designed OTP through FEM; the maximal hydrostatic stress and logarithmic strain in periodontal ligament (PDL) decreased by 26.81% and 32.60% compared to the control group. Clinical feedback indicated that a controllable correction of incisors was realized after 18 months, which was in accord with the FEM result and root/bone resorption by reason of stress/strain reduction on PDL did not occur.CONCLUSIONS: Biomechanical responses of periodontium can be quantitatively estimated using OTM and FEM. This study provided an alternative technological mean for the predictability and optimization of clinical OTP.

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Section: Discussionsupporting

confidence: 88%

Biomechanical investigation of orthodontic treatment planning based on orthodontic force measurement and finite element method before implementation: A case study

Liu

Zhang

et al. 2018

THC

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“…1). First, the maximum deflection of each wire alloy was assessed: SS and NiTi from 3 M Unitek (California, USA) and GUM-METAL® from Rock Mountain Morita Corporation (Tokyo, Japan); in which a three-bending test was performed for three different wire materials [14][15][16]. All wires had the same circular cross-section diameter (0.016″).…”

Section: Experimental Designmentioning

confidence: 99%

“…A triangular indenter was centrally positioned, and the test was performed at 0.5 mm/min vertical cross speed, using a universal testing machine, with a 50 N loading cell (Shimadzu, Kyoto, Japan). All test parameters and sample sizes were in accordance with ISO 15841:2007-01 (Dentistrywires for use in orthodontics) [16]. The Shimadzu Trapezium 2 software (version 2.33, Shimadzu, Kyoto, Japan) was used to record the load force vs. displacement.…”

Section: Three-point Bending Testmentioning

confidence: 99%

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An in vitro assessment of the influences of different wire materials and bracket systems when correcting dental crowding

Nahás-Scocate

Neves

Souza

et al. 2020

J Mater Sci: Mater Med

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A recently developed orthodontic wire alloy known as GUMMETAL® is claimed to deliver more physiological forces to correct dental mispositioning. However, its mechanical characteristics have not been fully characterized yet. This study aimed to determine and compare the elastic properties of different wire alloys, such as nickel-titanium (NiTi), stainless steel (SS), and GUMMETAL®, and assess their unloading forces when combined with either conventional or self-ligating brackets (CL and SL) when correcting dental crowding. All wires had a 0.016″ cross-section diameter. A three-point bending test was performed to assess the maximum deflection of each wire. Then, a subsequent analysis measured the unloading force for each wire/bracket system in a dental crowding clinical simulation device. The test was carried out in a universal testing machine with a cross-speed displacement of 0.5 mm/min. Data were recorded in different ranges and statistically evaluated using two-way analysis of variance. GUMMETAL® displayed higher unloading mean forces in SL brackets (2228.78 cN) than CL brackets (1967.38 cN) for the 1.6-3.0 deflection interval (p = 0.018). Within this interval, NiTi showed higher forces when used with CL brackets (2683.06 cN) than with SL brackets (1179.66 cN) (p < 0.0001). For the CL bracket systems, SS wires showed higher forces (2125.31 cN) in the 1.0-1.6 deflection interval than the other two wire alloys (NiTi, 1541.52 cN and GUMMETAL®, 852.65 cN) (p < 0.0001). SS wires also displayed lower forces with SL brackets (1844.01 cN) than in CL brackets (2125.31 cN) (p = 0.049). Thus, only GUMMETAL® revealed to be an optimal choice for SL brackets, whereas NiTi for CL brackets.

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“…2 Frequently used coatings include epoxy resin and polytetrafluoroethylene (PTFE), which improve esthetics, but can modify the surface in a way that can adversely affect several properties including biome-chanics, mechanical durability, corrosion behavior, and plaque accumulation. 3,4,5 Epoxy resin is a synthetic resin composed of the combination of epoxy and other polymers. Useful properties include its adhesion to metal, resistance to solubility, electrical insulation, and dimensional stability.…”

Section: Introductionmentioning

confidence: 99%

In vitro Streptococcus mutans adhesion and biofilm formation on different esthetic orthodontic archwires

Oliveira¹,

Thomson²,

Alhabeil³

et al. 2021

The Angle Orthodontist

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Objectives To evaluate the ability of different esthetic archwires to retain oral biofilms in vitro. Materials and Methods Seven different brands of coated orthodontic archwires were tested: two epoxy coated, two polytetrafluoroethylene coated, two rhodium coated, and one silver plus polymer coated. Conventional uncoated metallic archwires were used as controls. Streptococus mutans adherence to archwires was quantified by colony count following 24 hours of biolfilm growth, and total wire-associated biofilm was measured using a crystal violet staining assay. For both tests, two conditions were used: 0% sucrose and 3% sucrose. For statistical analysis, P < .05 was considered as statistically significant. Results For S. mutans colony forming units per biofilm, there were no statistically significant differences among the various archwires (P = .795 for 0% sucrose; P = .905 for 3% sucrose). Regarding total biofilm formed on archwires in the 3% sucrose condition, there were statistically significant differences in crystal violet staining only for the comparison between Niti Micro Dental White and Copper Ni-Ti wires (P < .05). Conclusions The clinical use of esthetic-coated orthodontic wires may be considered to have similar risks as uncoated archwires for biofilm retention.

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Mechanical properties of different esthetic and conventional orthodontic wires in bending tests

Abstract: The translucent wires had the lowest forces in all three bending tests; however, displacements above 3 mm resulted in increased risk of fracture. Forces of investigated NiTi wires were very high and in part above clinically recommended values.

Cited by 11 publications

References 22 publications

Biomechanical investigation of orthodontic treatment planning based on orthodontic force measurement and finite element method before implementation: A case study

Biomechanical investigation of orthodontic treatment planning based on orthodontic force measurement and finite element method before implementation: A case study

An in vitro assessment of the influences of different wire materials and bracket systems when correcting dental crowding

In vitro Streptococcus mutans adhesion and biofilm formation on different esthetic orthodontic archwires

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