The Influence of heat treatment in orthodontic arches made of stainless steel wire

Biasi, R.S. de; Ruela, A.C.O.; Elias, Carlos Nelson; Chevitarese, Orlando

doi:10.1590/s1516-14392000000300009

Cited by 4 publications

(7 citation statements)

References 2 publications

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“…Thus, after this transformation, diverse zones of different hardness are created in the arch. To overcome this inconvenient, annealing is done to homogenize the mechanical properties of the wire and relieve stress [68]. Several authors have proposed temperatures and times to accomplish this.…”

Section: Heat Treatmentmentioning

confidence: 99%

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Stainless Steel: Material Facts for the Orthodontic Practitioner

Santander

Ossa

2015

Rev. nac. odontol.

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Abstract. Stainless steel is one of the most widely used materials in current orthodontics. Archwires, brackets, bands, ligatures, tubes, among other appliances, are manufactured using different types of this alloy. The first evidence of the use of this alloy in the orthodontic field dates back to the mid-1920s, when it was introduced as a material to manufacture wires. The alloy has ever since gained popularity among orthodontists and its further development has led to its widespread use in today's different orthodontic techniques. Despite being available for more than 80 years, and the fact that most orthodontists use it on a daily basis, there is still a lack of knowledge about the basic principles, composition, and properties of this material by these professionals. Therefore, the purpose of this literature review is to discuss the main characteristics and properties of stainless steel that are useful in the orthodontic practice for orthodontists to take advantage of this remarkable material.Keywords: stainless steel, orthodontic wires, austenitic, orthodontic brackets. Resumen. El acero inoxidable es uno de los materiales más ampliamente utilizados en la ortodoncia actual. Los arcos de alambre, brackets, bandas, ligaduras, tubos, entre otros aparatos, se fabrican utilizando diferentes tipos de esta aleación. La primera evidencia del uso de esta aleación en el campo de la ortodoncia se remonta a mediados de la década de los veinte cuando se introdujo como un material para fabricar alambres. Desde ese entonces, esta aleación ha ganado popularidad entre los ortodoncistas y su desarrollo posterior ha llevado al uso extendido en las diferentes técnicas de ortodoncia de la actualidad. A pesar de haber estado disponible por más de ochenta años, y del hecho de que la mayoría de los ortodoncistas lo usan a diario, todavía existe un desconocimiento acerca de los principios básicos, la composición y las propiedades de este material por parte de estos profesionales. Por tanto, el objeto de esta revisión de la literatura es discutir las principales características y propiedades del acero inoxidable que son útiles en la práctica de la ortodoncia para que los ortodoncistas se beneficien de este notable material.Palabras clave: acero inoxidable, alambres de ortodoncia, austenítico, brackets de ortodoncia. Aço inoxidável: fatos significativos para o ortodontista praticanteResumo. O aço inoxidável é um dos materiais mais largamente empregados na ortodontia atual. Os arcos de arame, aparelhos, bandas, ligaduras, tubos, dentre outros aparelhos, são fabricados com diferentes tipos desta liga. A primeira evidencia do uso desta liga no campo da ortodontia remonta a meados da década dos vinte quando foi introduzido um material para fabricar arames. Desde essa altura, essa liga ganhou popularidade dentre os ortodontistas e seu desenvolvimento subsequente levou a ampliar seu uso nas diferentes técnicas de ortodontia da atualidade. Embora estivesse disponível por mais de 80 anos, e apesar do fato de que a maioria dos ortodontistas ut...

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Section: Heat Treatmentmentioning

confidence: 99%

“…Funk [70] states that 850°F (454.4°C) for three minutes is the best approach. Ingerslev [71] proposes 350-375°C for four minutes, while De Biasi et al [68] suggest 450°C for three minutes. Heat treatment leads to improved elastic strength [69].…”

Section: Heat Treatmentmentioning

confidence: 99%

Stainless Steel: Material Facts for the Orthodontic Practitioner

Santander

Ossa

2015

Rev. nac. odontol.

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“…The majority of austenitic 300 series undergo a martensitic transformation after cold working, and the martensitic phase is responsible for the mechanical resistance 2 . After annealing, the properties are homogenized and stress generated by the strain is relieved.…”

Section: Discussionmentioning

confidence: 99%

“…In 1929, stainless steel wires began to be used in orthodontics and became popular due to its low cost and mechanical properties, such as good formability, biocompatibility, ductility, corrosion resistance, hardness and resilience. 2 …”

Section: Introductionmentioning

confidence: 99%

“…However, the heat treatment of stainless steel orthodontic archwires is quite controversial in the literature, due to the different ranges of time and temperature used. 2 , 6 , 7 , 9 - 14 Supporters of heat treatment claim that the improvement in mechanical properties is due to stress relief, rather than a true transformation or precipitation of carbides. 6 , 11 Others believe that the improvement obtained is not enough to justify the procedure and that these changes are not clinically noticeable.…”

Section: Introductionmentioning

confidence: 99%

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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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