Fios ortodônticos: conhecer para otimizar a aplicação clínica

Quintão, Cátia Cardoso Abdo; Brunharo, Ione Helena Vieira Portella

doi:10.1590/s1415-54192009000600017

Cited by 13 publications

(45 citation statements)

References 16 publications

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“…[1][2][3] The increasing demand for esthetics has promoted the development of coated wires with polymeric materials and extruded wires made of polymer matrix fiberglass-reinforced plastic. 12 The surface and thickness of metallic-coated wires can be modified, which can affect corrosive properties, mechanic durability, and especially, friction forces. 11 Alternatively, allpolymer wires adequately match tooth color and present stiffness properties similar to those of metallic archwires, but wire fracture is their biggest drawback.…”

Section: Introductionmentioning

confidence: 99%

Influence of thermal or chemical degradation on the frictional force of an experimental coated NiTi wire

Bandeira¹,

Santos²,

Pulitini³

et al. 2011

The Angle Orthodontist

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Objective: To evaluate the friction force in sliding systems composed of coated NiTi archwires, coated NiTi subjected to thermal cycling, and coated NiTi subjected to acid solution immersion, and compare them to NiTi and polymeric wires. The null hypothesis is that there will be no difference among the wires as to friction force. Materials and Methods: Samples of NiTi (n 5 05), coated NiTi (n 5 15), and OPTIS (n 5 05) 0.016 inches in diameter and 50 mm long, in conjunction with Metafasix ligatures and saliva in InVu brackets, were submitted to friction testing. Among the 15 coated NiTi samples, 5 were submitted to thermal cycling for 3000 cycles; the other 5 samples were immersed in acid solution for 30 days. The results were statistically analyzed at P . .05 or P . .01. Microscopic analysis was performed in the coated NiTi wires before and after thermal cycling and acid solution immersion. Results: The mean (6 standard deviation) maximum friction force for NiTi, coated NiTi, and OPTIS was 105.20 6 (2.63); 99.65 6 (0.64); 59.76 6 (4.93) (P 5 .000), respectively. There was no significant difference in NiTi, coated NiTi, and acid-immersed coated NiTi (P . .05). Among the thermal-cycled or acid-immersed coated NiTi wires there was lower friction force in those undergoing thermal cycling (P 5 .001). The coated NiTi and the OPTIS presented homogeneous surfaces, whereas NiTi wires presented a heterogeneous surface. Fractures were observed in the coated NiTi wires that underwent thermal cycling.

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Section: Introductionmentioning

confidence: 99%

Influence of thermal or chemical degradation on the frictional force of an experimental coated NiTi wire

Bandeira¹,

Santos²,

Pulitini³

et al. 2011

The Angle Orthodontist

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“…In order to achieve more efficient movement and to prevent damage to the supporting tissue, it is necessary that the orthodontist has knowledge about the structural and mechanical properties of the wires used in clinical practice, since tooth movement is a result of the accumulation of elastic energy and the transformation of this energy into mechanical work. Currently in orthodontics, four basic types of alloys are used: stainless steel; nickel-titanium (NiTi) and its variations (superelastic, thermodynamic and with the addition of copper); beta-titanium alloys, and aesthetic composites 1 …”

Section: Introductionmentioning

confidence: 99%

Influence of heat treatment on the mechanical properties of CrNi stainless steel orthodontic wires

Sepúlveda

Gontijo

Santos

et al. 2019

Dental Press J. Orthod.

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Introduction: The heat treatment of stainless steel wires is a routine clinical procedure adopted by many dentists in order to relieve the stress caused after performing bends in the archwire. Objective: This study aimed to evaluate the influence of heat treatment of stainless steel archwires with a rectangular section of 0.016 x 0.022’-in. Methods: For analysis of the dimensional stability, the anterior and posterior dimensions of forty 0.016 x 0.022-in stainless steel orthodontic archwires without heat treatment and 30 days after heat treatment were evaluated. For analysis of the mechanical properties, 12 stainless steel wire segments with the same rectangular section without heat treatment and 30 days after heat treatment were tested through tensile strength and strain tests. To evaluate if there were differences between the anterior and posterior dimensions, the results were analyzed by the Student’s t-test. To compare the tensile strength and strain between the groups, the ANOVA test was used. The level of significance adopted was 95% (p< 0.05). Results: The heat treatment did not stop the expansion of archwires 30 days after their preparation, and there was no statistical difference in the tensile strength and strain tests with and without heat treatment. Conclusion: From the findings of this study, it can be conclude that the mechanical behavior of heat-treated stainless steel archwires is similar to that of archwires not subjected to heat treatment.

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“…Orthodontic therapy is based on the principle of transforming accumulated elastic energy into mechanical work to obtain dental movement, in which the changes that dentists impose on the appliance provide the control over the mechanism of load transference and distribution 1 .…”

Section: Introductionmentioning

confidence: 99%

Osseointegrated implant as an auxiliary of orthodontic leveling in case of asymmetric vertical skeletal discrepancy – case report

Bernardini¹,

Claudino²,

Pereira³

2019

Rev. da Fac. de Odontologia, UPF

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The aim of this work is to present a case report where an osteointegrated implant was used as skeletal anchorage unit in association with fixed orthodontic appliance in the treatment of an adult patient with vertical asymmetrical skeletal discrepancy. In this case report, the pre-existing osseointegrated implant in the region of element 21 was used as an aid of skeletal anchorage for the leveling of the upper occlusal plane by means of the straight-wire technique, Capelozza standard I slot .022 ", using the sequence of arches of nickel-titanium thermo-activated .014 ", .016", .017 "X.025" and .019X.025 ", followed by the steel arch .019" X.025". The results presented in this report demonstrated the osteointegrated implant as a good option, when used as anchorage resource to help orthodontics, providing better conditions of comfort and esthetics, as well as simplifying the technique.

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Fios ortodônticos: conhecer para otimizar a aplicação clínica

Cited by 13 publications

References 16 publications

Influence of thermal or chemical degradation on the frictional force of an experimental coated NiTi wire

Influence of thermal or chemical degradation on the frictional force of an experimental coated NiTi wire

Influence of heat treatment on the mechanical properties of CrNi stainless steel orthodontic wires

Osseointegrated implant as an auxiliary of orthodontic leveling in case of asymmetric vertical skeletal discrepancy – case report

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