Forces in initial archwires during leveling and aligning: An in-vitro study

Reddy, Rajesh Kumar; Katari, Pavan Kumar; Bypureddy, Tarun T; Anumolu, Venkata Naga Sri Harsha; Sairam, Nemala R V

doi:10.4103/2231-0762.192940

Cited by 7 publications

(6 citation statements)

References 19 publications

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“…The findings in our study were in accordance with Taneja 35 in 2003, Khatri 36 in 2014, Dechkunakom 37 in 2014, Reddy 38 in 2016, and Lubinsky 39 in 2018, which concluded that the activation and deactivation behaviors of a wire are usually not the same. Therefore, force-deflection graphs generated during the activation (loading) and deactivation (unloading) cycles of a wire do not superimpose.…”

Section: Discussionsupporting

confidence: 88%

Comparative Evaluation of Dimensional Accuracy, Surface Characteristics, and Load Deflection Attributes of 0.019" × 0.025" Stainless Steel Wires Sourced from Six Different Commercial Houses: An In Vitro Study

Kolge

Patni

Karandikar

et al. 2020

J Indian Orthod Soc

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Aims & Objectives: The aim of the study was to evaluate and compare dimensional accuracy, surface characteristics and load deflection attributes of SS wires sourced from six different commercial houses. Materials & Methods: 0.019” x 0.025” SS wire samples were divided into 6 groups and evaluated and compared for the aforementioned properties. Dimensional accuracy, surface roughness, frictional resistance, load deflection rate and ultimate tensile strength were evaluated and compared. Results: Dimensional accuracy did not vary significantly. Surface Profilometry proved 3M Unitek (Group 1) to be the wire with least irregularities. According to SEM, Modern Orthodontics (Group 6) and 3M Unitek (Group 1) in terms of ‘Sa’ and ‘Sq’ respectively had the smoothest surface finish. SS wires sourced from G&H Orthodontics (Group 2) exhibited least frictional resistance. Load deflection rates varied for all the groups for all three parameters under the study. UTS was best for SS wires sourced from Rabbit Force Orthodontics (Group 5). Conclusion: No wire from a single commercial house excels in all the parameters that were evaluated, each one having its aces and minuses.

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Section: Discussionsupporting

confidence: 88%

Comparative Evaluation of Dimensional Accuracy, Surface Characteristics, and Load Deflection Attributes of 0.019" × 0.025" Stainless Steel Wires Sourced from Six Different Commercial Houses: An In Vitro Study

Kolge

Patni

Karandikar

et al. 2020

J Indian Orthod Soc

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“…Deflection test with three-point bending technique is a frequently used technique to determine the magnitude of the activation and deactivation force of orthodontic wire. 6 Loading force describes the amount of wire activation force, and unloading force illustrates the magnitude of wire deactivation force. 3 Research on loading and unloading forces in the deflection test of SS rounded initial wire, superelastic NiTi, multistranded SS, thermal NiTi, and multistranded coaxial NiTi conducted by Khatri and Mehta in 2014 suggests that there are significant loading and unloading forces in the wire group.…”

Section: Introductionmentioning

confidence: 99%

Deflection test on different orthodontic wire materials sized 0.016 x 0.022 inches

Pratomo

Mardiati

Soemantri

et al. 2019

Majalah Kedokteran Gigi Indonesia

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The development of technology in orthodontic field produces some orthodontic wires that have different deflection abilities. Loading force is the force needed to place an orthodontic wire in bracket slot (activation). Unloading force is the force produced by an orthodontic wire to move tooth (deactivation). Deflection test with three-point bending technique is a technique that is often used to determine the magnitude of the activation and deactivation force of orthodontic wire. Stainless steel (SS), nickel titanium (NiTi), copper nickel titanium (CuNiTi), and beta titanium (TMA), are the types of frequently used wires. This study aimed to compare loading and unloading force on the deflection test of SS, NiTi, CuNiTi, and TMA orthodontic wires sized 0.016 x 0.022 inch on the load-deflection graph. This is a laboratoryexperimental research on a total of 16 pieces of SS, NiTi, CuNiTi, and TMA orthodontic wires sized 0.016 x 0.022 inches. The group was divided based on the type of material. The deflection test was performed using a universal testing machine with a press speed of 5 mm/minute. Loading and unloading forces were recorded on deflections of 0.5; 1; and1.5 mm. Statistical tests of differences among groups were carried out by ANOVA analysis (p-value ≤ 0.05) and post-hoc analysis with T-test. There were significant differences in the loading and unloading forces recorded on deflections of 0.5; 1; and 1.5 mm; except for deflections of 0.5 mm of the SS and nickel-titanium wires. The wire deflection force fromthe lowest to the highest was CuNiTi wire, nickel-titanium wire, TMA wire, and stainless-steel wire.

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“…Though light and continuous, orthodontic forces at the onset of treatment might cause pain and discomfort to the patients submitted to therapy with fixed appliances. 22 Moreover, in the period shortly after the orthodontic device's bonding, the individual might be affected by ulcers or lesions, which may also lead to pain and discomfort. 23 Thus, the fixed appliances' placement and the application of forces to induce tooth movement explain the increase in pain levels 1 month following the orthodontic device's bonding and also the reduction of such levels in the fourth month of the treatment, when the alignment and leveling have been fully completed.…”

Section: Bzmw=brazilian Minimum Wagementioning

confidence: 99%

Perceptions of pain levels and chewing impairment among adolescents undergoing orthodontic treatment with fixed appliances

et al. 2018

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Aim: The aim of this cohort study was to evaluate the perceptions of adolescents regarding pain levels and chewing impairment throughout the first 12 months of orthodontic treatment with fixed appliances. Methods: A total of 120 adolescents aged 11 and 12 years undergoing orthodontic treatment at the Faculty of Dentistry of the Federal University of Minas Gerais participated in this study. Malocclusion was evaluated by means of the Dental Aesthetic Index. Pain level and degree of chewing impairment were evaluated by means of two questions selected from the short form of the Child Perceptions Questionnaire (CPQ11-14). Each question had five response options with the following scoring system: never (0), once or twice (1), sometimes (2), often (3) and every day/almost every day (4). Both questions were answered by the adolescents at four different times: before fixed appliances' placement (T1), one month after banding and fixed appliances' bonding (T2), four months after banding and fixed appliances' bonding (T3), and 12 months after banding and fixed appliances' bonding (T4). Results: The mean age of adolescents was 11.39 (±0.68). Significant differences were observed for pain levels (p=0.038) and chewing impairment (p=0.020) over the study period. Pain levels at T1 were significantly lower than at T2 (p=0.038) and T4 (p=0.020). Chewing impairment at T1 was significant lower than at T2 (p<0.001), T3 (p=0.014) and T4 (p=0.005). Conclusion: Adolescents undergoing orthodontic treatment with fixed appliances present an increase in pain levels and in chewing impairment.

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Forces in initial archwires during leveling and aligning: An in-vitro study

Cited by 7 publications

References 19 publications

Comparative Evaluation of Dimensional Accuracy, Surface Characteristics, and Load Deflection Attributes of 0.019" × 0.025" Stainless Steel Wires Sourced from Six Different Commercial Houses: An In Vitro Study

Comparative Evaluation of Dimensional Accuracy, Surface Characteristics, and Load Deflection Attributes of 0.019" × 0.025" Stainless Steel Wires Sourced from Six Different Commercial Houses: An In Vitro Study

Deflection test on different orthodontic wire materials sized 0.016 x 0.022 inches

Perceptions of pain levels and chewing impairment among adolescents undergoing orthodontic treatment with fixed appliances

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