Evaluation of the Biomechanical Properties of Austenitic Stainless Steel Fixed Retainers

2020 ◽  
Vol 71 (9) ◽  
pp. 320-324
Author(s):  
Silvia Izabella Pop ◽  
Zakarias Szabolcs ◽  
Dana Cristina Bratu ◽  
Mircea Dudescu ◽  
Mariana Pacurar ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Orthodontic Treatment ◽  
Biomechanical Properties ◽  
Mechanical Parameters ◽  
Bending Properties ◽  
Steel Wires ◽  
Fixed Appliances ◽  
Fixed Retainers ◽  
Fixed Retention

The insertion of the fixed retention is an important stage of the orthodontic treatment after fixed appliances. The fixed retainers used in orthodontic treatments must be passive towards teeth, without developing any stress. This characteristic is challenging to achieve due to the mechanical properties (bending properties, stiffness) of the materials the retainers are manufactured from. Residual stress might be generated because of their flexibility and because the chemical composition of the stainless steel wires.This study aims to determine the mechanical properties of different austenitic stainlees steel wires used in retention. Also, we have compared the mechanical properties of wires with different sizes, as well as wires with the same size, new and intra-orally used. The results confirm that the mechanical parameters of the two types of wires used in fixed retention (3 braided round wires and 6 braided Flat wires) present statistically insignificant differences. The study also reflects that the mechanical properties of the intra-orally used wires showed decreased values of the parameters.

Bending Properties of General Purpose Stainless Steel Wire Formed for Orthodontic Use

2013 ◽  
Vol 746 ◽  
pp. 394-399
Author(s):  
Niwat Anuwongnukroh ◽  
Yosdhorn Chuankrerkkul ◽  
Surachai Dechkunakorn ◽  
Pornkiat Churnjitapirom ◽  
Theeralaksna Suddhasthira
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Orthodontic Treatment ◽  
Steel Wire ◽  
General Purpose ◽  
Stainless Steel Wire ◽  
Bending Test ◽  
Bending Properties ◽  
Steel Wires ◽  
Significant Difference

The archwire is generally used in fixed appliances for orthodontic treatment to correct dental malocclusion. However, it is interesting to know whether general purpose stainless steel wire could replace commercial orthodontic archwire in orthodontic practice for economic reasons. The purpose of this study was to determine the bending properties of general purpose stainless steel wire compared with commercial orthodontic stainless steel wires after forming as an archwire for orthodontic use. The samples used in this study were 90 general purpose and 45 commercial (Highland) round stainless steel wires in 0.016, 0.018, and 0.020 sizes (30 general purpose and 15 commercial wires for each size). All 15 general purpose stainless steel wires with different sizes were formed into orthodontic archwire with a Universal Testing Machine. All samples were tested (three-point bending test) for mechanical properties. The results showed no significant difference between general purpose and commercial orthodontic wires in size 0.016 for 0.1 mm offset bending force, 0.2% yield strength, and springback. Although many mechanical properties of general purpose wires differed from commercial wires, their values conformed to other previous studies within the range of clinical acceptance. In conclusion, orthodontic formed general purpose round stainless steel wires had statistically different (p <0.05) mechanical properties from commercial orthodontic stainless steel wires (Highland) but the mechanical properties were acceptable to use in orthodontic treatment.

scholarly journals Three Palatal Arches Used to Correct Posterior Dental Crossbites

2006 ◽  
Vol 76 (6) ◽  
pp. 1047-1051 ◽  
Author(s):  
Fernando Lima Martinelli ◽  
Priscilla Sobral Couto ◽  
Antonio Carlos Oliveira Ruellas
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Statistical Analysis ◽  
Orthodontic Treatment ◽  
Elasticity Modulus ◽  
Steel Wire ◽  
Testing Machine ◽  
Stainless Steel Wire ◽  
Quad Helix ◽  
One Way Anova

Abstract Objective: To assess the force, resilience, and elasticity modulus produced by the Coffin appliance, “W” arch, and quad-helix made with 0.032-inch and 0.036-inch stainless steel wire. Materials and Methods: Two groups of 15 arches were made as Coffin appliances, two groups of 15 arches were made as “W” arches, and two groups of 15 arches were made as quad-helices. One group of each appliance was formed in 0.032-inch and one group in 0.036-inch stainless steel wire. All arches (6 groups of 15 each) were submitted to compression trials in the mechanical testing machine EMIC DL-10000, simulating 5-, 8-, 10-, and 12-mm activation. The force and resilience means received a one-way ANOVA statistical analysis. Results: The results showed that the mechanical properties depended on the shape of the appliance, the diameter of the wire used, and the amount of activation. Conclusions: The three appliances assessed produce appropriate forces for orthodontic treatment as long as they are correctly planned during clinical application.

scholarly journals Modified Keles TPA –An Effective Method for Molar Derotation

2020 ◽  
Vol 10 (1) ◽  
pp. 75-78
Author(s):  
Amitabh Kallury ◽  
Jaina Dubey ◽  
Rajesh Kumar Balani ◽  
Chandni Bharti
Keyword(s):  
Stainless Steel ◽  
Clinical Practice ◽  
Orthodontic Treatment ◽  
Class I ◽  
Steel Wires

Mesio-palatal rotation of maxillary 1st molars is commonly encountered in clinical practice and this results in a Class I molar relation becoming end on. Traditionally transpalatal arches (TPA) fabricated with 0.036” stainless steel wires have been used for correction of molar rotation in fixed orthodontic treatment. They are not very efficient in correcting the mesio-palatal rotations and require frequent activations. This article describes a modified Keles TPA as an easy, effective method for rapid and precise correction of unilateral or bilateral mesio-palatal molar rotations

Comparison of Properties between General Purpose Stainless Steel Wire and Commercial Orthodontic Stainless Steel Wire

2011 ◽  
Vol 378-379 ◽  
pp. 706-710 ◽  
Author(s):  
Niwat Anuwongnukroh ◽  
Surachai Dechkunakorn ◽  
Pornkiat Churnjitapirom ◽  
Ekkapot Sukhanun ◽  
Tunwa Intrarasuksanti ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Steel Wire ◽  
Nickel Content ◽  
Chemical Properties ◽  
Surface Characteristics ◽  
General Purpose ◽  
Stainless Steel Wire ◽  
Steel Wires

In Thailand, commercial orthodontic stainless steel wires are imported from overseas and expensive. However, lower cost general purpose stainless steel wires, the same type and number as commercial orthodontic stainless steel wires may be used for orthodontic purposes. Objective: This study aimed to determine the physical, mechanical and chemical properties of general purpose stainless steel wire compared with commercial orthodontic stainless steel wires. Materials and Method: Two commercial orthodontic stainless steel wires (Ormco and Highland) and general purpose stainless steel wire (SUS 304H) were evaluated. The physical and mechanical properties were studied according to ISO 15841:2006 and corrosion resistance was studied according to ISO 10271:2001. Surface characteristics and composition were studied by scanning electron microscope (SEM) and electron probe micro analyzer, respectively. Results: The experiment indicated that SUS 304H had the diameter and mechanical properties in the range of orthodontic stainless steel wires. The surface characteristics SUS 304H were similar from observation by SEM magnifications but SUS 304H had lower corrosion resistance due to lower nickel content. The composition confirmed that the three samples wires were genuine type 304. Conclusion: SUS 304H properties are comparable to commercial orthodontic wire properties.

scholarly journals Resistance to sliding of orthodontic archwires under increasing applied moments

2020 ◽  
Vol 18 ◽  
pp. 228080002096802
Author(s):  
Ahmed Youssef ◽  
Carson Dennis ◽  
John P. Beyer ◽  
Thorsten Grünheid
Keyword(s):  
Stainless Steel ◽  
Material Properties ◽  
Gold Standard ◽  
Orthodontic Treatment ◽  
Current Gold Standard ◽  
Resistance To Sliding ◽  
Ceramic Brackets ◽  
Fixed Appliances ◽  
Orthodontic Archwires ◽  
Sliding Mechanics

Background: Orthodontic treatment with fixed appliances involves sliding of brackets along archwires. These movements involve friction, which causes resistance to sliding. In addition, moments cause teeth to tip until binding occurs between the bracket and archwire. The manufacturer of a new TiMolium®Titanium archwire claims material properties superior to β-Titanium, potentially leading to reduced resistance to sliding. Objective: To compare TiMolium archwires with β-Titanium and stainless steel archwires as the current gold standard for sliding mechanics under application of an increasing moment. Materials and methods: A total of 120 stainless steel (Smartclip, 3M, Monrovia, CA) and ceramic self-ligating 0.022″-slot brackets (Clarity SL, 3M) were divided into six equal-sized groups. Resistance to sliding was tested with 0.019″ × 0.025″ TiMolium (TP Orthodontics, La Porte, IN), β-Titanium (3M), and stainless steel (3M) archwires using a custom-designed apparatus to simulate sliding mechanics and application of moments of 1000, 2000, and 3000 g-mm. Results: Using stainless steel brackets, the TiMolium archwires had significantly higher resistance to sliding than stainless steel archwires at all moments tested while there was no difference between TiMolium and β-Titanium. Using ceramic brackets, the resistance to sliding with TiMolium archwires was no different than with stainless steel archwires. Both TiMolium and stainless steel archwires showed significantly lower resistance to sliding than β-Titanium. Conclusion: TiMolium archwires have resistance to sliding intermediary to stainless steel and β-Titanium archwires when clinically relevant moments are applied. Used with the stainless steel brackets, they behave like β-Titanium, whereas used with the ceramic brackets, they behave more like stainless steel.

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