Comparison of deflection forces of esthetic archwires combined with ceramic brackets

Matias, Murilo; Freitas, Marcos Roberto de; Freitas, Karina Maria Salvatore de; Janson, Guilherme; Higa, Rodrigo Hitoshi; Francisconi, Manoela Fávaro

doi:10.1590/1678-7757-2017-0220

Cited by 12 publications

(13 citation statements)

References 28 publications

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“…In the study performed by Matias et al [ 108 ], the load-deflection properties of coated nickel-titanium (NiTi) and esthetic archwires combined with conventional ceramic brackets were compared using a clinical simulation device. In this experiment, the following materials were used: non-coated NiTi (NC), Teflon-coated NiTi (TC), rhodium-coated NiTi (RC), epoxy-coated NiTi (EC), fiber- reinforced polymer (FRP), and three different conventional brackets: metal-insert polycrystalline ceramic (MI-PC), polycrystalline ceramic (PC) and monocrystalline ceramic (MC).…”

Section: Resultsmentioning

confidence: 99%

Functional Coatings for Orthodontic Archwires—A Review

et al. 2020

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In this literature review, the current state-of-art of coatings for orthodontic archwires’ increasing antimicrobial and relevant mechanical properties, such as surface topography, friction or corrosion resistance, has been presented. There is a growing request for orthodontic appliances, therefore, most researchers focus on innovative functional coatings to cover orthodontic archwires and brackets. Orthodontic appliances are exposed to the unfavorable oral cavity environment, consisting of saliva flow, food, temperature and appliance force. As a consequence, friction or biocorrosion processes may occur. This can affect the functionality of the orthodontic elements, causing changes in their microstructure, surface topography and mechanical properties. Furthermore, the material which the orthodontic archwire is made from is of particular importance in terms of the possible corrosion resistance. This is especially important for patients who are hypersensitive to metals, for example, nickel, which causes allergic reactions. In the literature, there are some studies, carried out in vitro and in vivo, mostly examining the antibacterial, antiadherent, mechanical and roughness properties of functional coatings. They are clinically acceptable but still some properties have to be studied and be developed for better results. In this paper the influence of additives such as nanoparticles of silver and nitrogen-doped TiO2 applied on orthodontic brackets by different methods on the antimicrobial properties was analyzed. Future improvement of coating techniques as well as modification of the archwire composition can reduce the release of nickel ions and eliminate friction and bacterial adhesion problems, thus accelerating treatment time.

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Section: Resultsmentioning

confidence: 99%

Functional Coatings for Orthodontic Archwires—A Review

et al. 2020

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“…Since then many researchers have studied the esthetic archwires evaluating the clinical performance in vivo and in vitro . [21019202122]…”

Section: Discussionmentioning

confidence: 99%

Evaluation of nanomechanical properties, surface roughness, and color stability of esthetic nickel-titanium orthodontic archwires

Alsanea

Shehri

2019

J Int Soc Prevent Communit Dent

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Objectives: The objective of the study is to evaluate the surface roughness, nanomechancial properties the color stability of three brands of coated (rhodium, epoxy, and Teflon) nickel-titanium (NiTi) esthetic archwires. Materials and Methods: Three brands of coated (rhodium, epoxy, and Teflon) esthetic NiTi archwires and three brands of uncoated (NiTi) archwires from the same manufactures were evaluated for the surface roughness, nanomechanical properties, and color stability. The specimens with 20 mm length ( n = 5) were cut from the straight buccal segments of the coated and uncoated archwires. The specimens with 20 mm length ( n = 10) were subjected to color measurement after immersion in a coffee staining solution. The color measurement was evaluated after 7, 14, 21, and 28 days after immersion in staining solution using color eye 7000 spectrophotometer. The experimental data were analyzed using descriptive statistics, analyses of variance, and Tukey's post hoc test. Results: Epoxy (1.517 ± 0.071) and rhodium (0.297 ± 0.015) coated archwires showed the highest and lower value of surface roughness. All the intergroup comparisons showed a significant difference ( P < 0.05) in surface roughness except between rhodium and control group ( P = 0.998). There were significant differences between control and the experimental groups for both nanohardness and elastic modulus was observed. All the three NiTi-coated esthetic archwires demonstrated trace” (extremely slight change) color changes as measured by the National Bureau of Standards units after 4 weeks of immersion. Conclusion: Surface roughness of rhodium-coated archwires was almost similar to that of uncoated wires. Whereas Teflon and epoxy coated archwires showed a significant difference in surface roughness compared to uncoated archwires. Uncoated archwires showed higher nanohardness values compared to the coated archwires. Teflon-coated archwires demonstrated significantly slight color change after 4 weeks of immersion in staining solution.

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“…The procedures used in this clinical simulation have been standardized and used previously [14][15][16][17]. The employed CL systems were Advanced brackets, Roth prescription (Orthometric®, São Paulo, Brazil), and the SL systems were DAMON® Q TM brackets Ormco (Orange, USA).…”

Section: Unloading Test (Clinical Simulation)mentioning

confidence: 99%

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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Comparison of deflection forces of esthetic archwires combined with ceramic brackets

Cited by 12 publications

References 28 publications

Functional Coatings for Orthodontic Archwires—A Review

Functional Coatings for Orthodontic Archwires—A Review

Evaluation of nanomechanical properties, surface roughness, and color stability of esthetic nickel-titanium orthodontic archwires

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

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