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Impact of different rectangular wires on torsional expression of different sizes of buccal tube

BACKGROUND: Torsions in rectangular wires are the essential part of corrections in the finishing stage of treatment. Moreover the greatest amounts of torques are applied in the molar areas. a clinically effective moment is between 5 and 20 Nmm. In this study we have decided to evaluate the impact of...

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Autores principales: Ajami, Shabnam, Boroujeni, Afshar-Rasti
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Medicina Oral S.L. 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5899803/
https://www.ncbi.nlm.nih.gov/pubmed/29670712
http://dx.doi.org/10.4317/jced.54300
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author Ajami, Shabnam
Boroujeni, Afshar-Rasti
author_facet Ajami, Shabnam
Boroujeni, Afshar-Rasti
author_sort Ajami, Shabnam
collection PubMed
description BACKGROUND: Torsions in rectangular wires are the essential part of corrections in the finishing stage of treatment. Moreover the greatest amounts of torques are applied in the molar areas. a clinically effective moment is between 5 and 20 Nmm. In this study we have decided to evaluate the impact of different tube sizes and different dimensions of wires with different modulus of elasticities on the amount torsional bond strength of molar tubes. MATERIAL AND METHODS: 60 human impacted molar teeth were collected. A buccal tube was bonded on the buccal surface of all the samples by using light cured adhesive resin. After that, the teeth were mounted in a hard acrylic block. According to the size of buccal tube and the rectangular wires to be tested 4 groups will be designed. Torsional force was applied by instron machine. The torque angle at 5Nmm and at 20Nmm point will be calculated: which means, how many degrees of torque is required to reach the maximum 20Nmm moment from the minimum 5Nmm.One-way ANOVA was used to compare torque angle in all of the groups. RESULTS: The least amount of clinically significant angle was 2.2 ᵒ in the 0.017×0.025 SS and the largest amount of it was 23.7 ᵒ in the 0.017×0.025 TMA in 0.018×0.025 slot molar tube. But, this angle was 19.9 ᵒand 13.6 ᵒ in 0.019×0.025 SS and 0.019×0.025 TMA archwire in 0.022×0.028 molar tube. CONCLUSIONS: The 0.017×0.025 SS archwire in 0.018×0.025 molar tube had the lowest clinically significant angle. The largest amount was seen in group 0.017×0.025 TMA in 0.018×0.025 slot molar tube. Key words: Torsional efficacy, rectangular wires, buccal tubes, torque angle.
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spelling pubmed-58998032018-04-18 Impact of different rectangular wires on torsional expression of different sizes of buccal tube Ajami, Shabnam Boroujeni, Afshar-Rasti J Clin Exp Dent Research BACKGROUND: Torsions in rectangular wires are the essential part of corrections in the finishing stage of treatment. Moreover the greatest amounts of torques are applied in the molar areas. a clinically effective moment is between 5 and 20 Nmm. In this study we have decided to evaluate the impact of different tube sizes and different dimensions of wires with different modulus of elasticities on the amount torsional bond strength of molar tubes. MATERIAL AND METHODS: 60 human impacted molar teeth were collected. A buccal tube was bonded on the buccal surface of all the samples by using light cured adhesive resin. After that, the teeth were mounted in a hard acrylic block. According to the size of buccal tube and the rectangular wires to be tested 4 groups will be designed. Torsional force was applied by instron machine. The torque angle at 5Nmm and at 20Nmm point will be calculated: which means, how many degrees of torque is required to reach the maximum 20Nmm moment from the minimum 5Nmm.One-way ANOVA was used to compare torque angle in all of the groups. RESULTS: The least amount of clinically significant angle was 2.2 ᵒ in the 0.017×0.025 SS and the largest amount of it was 23.7 ᵒ in the 0.017×0.025 TMA in 0.018×0.025 slot molar tube. But, this angle was 19.9 ᵒand 13.6 ᵒ in 0.019×0.025 SS and 0.019×0.025 TMA archwire in 0.022×0.028 molar tube. CONCLUSIONS: The 0.017×0.025 SS archwire in 0.018×0.025 molar tube had the lowest clinically significant angle. The largest amount was seen in group 0.017×0.025 TMA in 0.018×0.025 slot molar tube. Key words: Torsional efficacy, rectangular wires, buccal tubes, torque angle. Medicina Oral S.L. 2018-01-01 /pmc/articles/PMC5899803/ /pubmed/29670712 http://dx.doi.org/10.4317/jced.54300 Text en Copyright: © 2018 Medicina Oral S.L. http://creativecommons.org/licenses/by/2.5/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research
Ajami, Shabnam
Boroujeni, Afshar-Rasti
Impact of different rectangular wires on torsional expression of different sizes of buccal tube
title Impact of different rectangular wires on torsional expression of different sizes of buccal tube
title_full Impact of different rectangular wires on torsional expression of different sizes of buccal tube
title_fullStr Impact of different rectangular wires on torsional expression of different sizes of buccal tube
title_full_unstemmed Impact of different rectangular wires on torsional expression of different sizes of buccal tube
title_short Impact of different rectangular wires on torsional expression of different sizes of buccal tube
title_sort impact of different rectangular wires on torsional expression of different sizes of buccal tube
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5899803/
https://www.ncbi.nlm.nih.gov/pubmed/29670712
http://dx.doi.org/10.4317/jced.54300
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