Surface topography, hardness, and frictional properties of GFRP for esthetic orthodontic wires

Inami, Toshihiro; Tanimoto, Yasuhiro; Yamaguchi, Masaru; Shibata, Yo; Nishiyama, Norihiro; Kasai, Kazuhiko

doi:10.1002/jbm.b.33372

Cited by 17 publications

(19 citation statements)

References 25 publications

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“…e previous study confirmed that the GFRTP wires are more transparent than conventional metallic wires [2]. Moreover, field emission scanning electron microscopy and scanning probe microscopy analysis indicated that the surface roughnesses of the GFRTP wires are smoother than those of the β-Ti wire [3]. Furthermore, the GFRTP wires had frictional and flexural properties similar to those of the Ni-Ti wires [2,3].…”

Section: Introductionmentioning

confidence: 58%

“…In a previous study, esthetic orthodontic wires were produced by pultrusion of GFRTPs composed of a polycarbonate matrix reinforced with E-glass fibers [2,3]. Polycarbonate has been widely used in orthodontic appliances such as esthetic brackets and clear retainers [4], and it was used as a matrix of the GFRTP because of its high transparency, low weight, and high heat resistance [2,5].…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Esthetic Orthodontic Wires Made from Glass‐Fiber‐Reinforced Thermoplastic Containing High‐Strength, Small‐Diameter Glass Fibers

Tanimoto

Inami

Yamaguchi

et al. 2018

Advances in Materials Science and Engineering

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In this work, we investigated the properties of a glass-fiber-reinforced thermoplastic (GFRTP) composed of small-diameter (ϕ � 5 μm), high-strength glass (T-glass) fibers and polycarbonate for esthetic orthodontic wires formed using pultrusion. After fabricating such GFRTP round wires, the effects of varying fiber diameter (5 to 13 mm) on the mechanical properties, durabilities, and color stabilities were evaluated. e results showed that the mechanical properties of GFRTPs tend to increase with decreasing fiber diameter. Additionally, it was confirmed that the present GFRTP wires containing T-glass fibers have better flexural properties than previously reported GFRTP wires containing E-glass fibers. Meanwhile, thermocycling did not significantly affect the flexural properties of the GFRTP wires. Furthermore, the GFRTP wires showed color changes lower than the acceptable threshold level for color differences on immersion in coffee. From these results obtained in the present work, the GFRTP wires containing high-strength glass fibers have excellent properties for orthodontic applications. Our findings suggest that the GFRTPs might be applied to all phases of orthodontic treatment because their properties can be tuned by changing the fiber properties such as fiber type and diameter.

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Section: Introductionmentioning

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Characterization of Esthetic Orthodontic Wires Made from Glass‐Fiber‐Reinforced Thermoplastic Containing High‐Strength, Small‐Diameter Glass Fibers

Tanimoto

Inami

Yamaguchi

et al. 2018

Advances in Materials Science and Engineering

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“…The mechanical properties and in vitro biocompatibility of GFRP, such as surface characteristics, frictional properties, flexural properties, color stability, and cytotoxicity, were evaluated and we concluded that GFRP wire might be useful in orthodontic treatment (14)(15)(16). To evaluate its potential in clinical orthodontic treatment, we investigated the effects of GFRP wire on orthodontic force and changes in P2W and P3W compared with NiTi wire using an experimental dog model of tooth movement.…”

Section: Discussionmentioning

confidence: 99%

“…GFRP straight wire was fabricated using a pultrusion technique described in a previous study (14,15). A polycarbonate (H4000; Mitsubishi Engineering-Plastics Corp., Tokyo, Japan)was used as the thermoplastic matrix because of its low melt viscosity.…”

Section: Materials Preparationmentioning

confidence: 99%

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<b>Effects of Glass Fiber-reinforced Plastic for Orthodontic Wire on Bone Remodeling during Experimental Tooth Movement: Histological Study in Dogs</b>

et al. 2017

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Recently, we developed glass fiber-reinforced plastic(GFRP)orthodontic wire made from polycarbonate and glass fiber. The purpose of this study was to compare GFRP wire with nickel-titanium(NiTi)wire as assessed by the amount of tooth movement, the early tissue reaction of the periodontal ligament (PDL), and tartrate-resistant acid phosphatase (TRAP)expression in an experimental dog model of tooth movement in vivo.GFRP round wire, with a diameter of 0.45 mm(0.018-in), was prepared using 7 µm glass fibers. As a control, wires made of NiTi were also evaluated. The maxillary second and third premolars were moved buccally for 5 weeks in five beagles. The change in second and third premolar widths in NiTi and GFRP wires(P2WN, P2WG, P3WN and P3WG)were investigated. Furthermore, histological findings in the PDL and TRAP expression levels in the alveolar bone(AB)surface were measured.The amount of tooth movement in the GFRP group was roughly equal to that in the NiTi group. The numbers of TRAP-positive cells were not significantly increased in either group at 5 weeks. No significant differences in any parameters before and after treatment were noted between the two groups.GFRP wire showed equivalent efficiency to commercial NiTi wire in the amount of tooth movement and histological findings of periodontal tissues during experimental tooth movement. Therefore, GFRP wire can be used in place of NiTi wire at the initial leveling stage.

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Fabrication and physical properties of glass‐fiber‐reinforced thermoplastics for non‐metal‐clasp dentures

2016

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Recently, non-metal-clasp dentures (NMCDs) made from thermoplastic resins such as polyamide, polyester, polycarbonate, and polypropylene have been used as removable partial dentures (RPDs). However, the use of such RPDs can seriously affect various tissues because of their low rigidity. In this study, we fabricated high-rigidity glass-fiber-reinforced thermoplastics (GFRTPs) for use in RPDs, and examined their physical properties such as apparent density, dynamic hardness, and flexural properties. GFRTPs made from E-glass fibers and polypropylene were fabricated using an injection-molding. The effects of the fiber content on the GFRTP properties were examined using glass-fiber contents of 0, 5, 10, 20, 30, 40, and 50 mass%. Commercially available denture base materials and NMCD materials were used as controls. The experimental densities of GFRTPs with various fiber contents agreed with the theoretical densities. Dynamic micro-indentation tests confirmed that the fiber content does not affect the GFRTP surface properties such as dynamic hardness and elastic modulus, because most of the reinforcing glass fibers are embedded in the polypropylene. The flexural strength increased from 55.8 to 217.6 MPa with increasing glass-fiber content from 0 to 50 mass%. The flexural modulus increased from 1.75 to 7.42 GPa with increasing glass-fiber content from 0 to 50 mass%, that is, the flexural strength and modulus of GFRTP with a fiber content of 50 mass% were 3.9 and 4.2 times, respectively, those of unreinforced polypropylene. These results suggest that fiber reinforcement has beneficial effects, and GFRTPs can be used in NMCDs because their physical properties are better than those of controls. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 2254-2260, 2017.

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Surface topography, hardness, and frictional properties of GFRP for esthetic orthodontic wires

Cited by 17 publications

References 25 publications

Characterization of Esthetic Orthodontic Wires Made from Glass‐Fiber‐Reinforced Thermoplastic Containing High‐Strength, Small‐Diameter Glass Fibers

Characterization of Esthetic Orthodontic Wires Made from Glass‐Fiber‐Reinforced Thermoplastic Containing High‐Strength, Small‐Diameter Glass Fibers

<b>Effects of Glass Fiber-reinforced Plastic for Orthodontic Wire on Bone Remodeling during Experimental Tooth Movement: Histological Study in Dogs</b>

Fabrication and physical properties of glass‐fiber‐reinforced thermoplastics for non‐metal‐clasp dentures

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