Force decay and discoloration of thermoplastic and thermoset orthodontic elastomeric chains
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Dental Science |
Texto Completo: | https://ojs.ict.unesp.br/index.php/cob/article/view/2612 |
Resumo: | Objective: Elastomeric chains are commonly used to apply force for orthodontic dental movements. However,force decay and discoloration are two important weak points of these materials. The present study intended tocompare the force decay and color stability of different types of elastomeric chains. Material and Methods: Thisin vitro study evaluated 6 groups of elastomeric chains, including thermoplastic (TP) and thermoset (TS) chainsmade by the companies American Orthodontics (AO), Ormco (OR), and G&H Orthodontics (GH). The elastomericchain forces were measured at the baseline, following 1 hour, 1 day, 1, 2, 3, 4, 5, and 6 weeks of stretching.The elongation required for the chains to exert a force of 250 g was calculated. E of each group was calculatedby a spectrophotometer following immersion in black tea solution for 6 days. Data were analyzed using theSPSS 22 software and the statistical methods of repeated measures analysis of variance and two-way analysis ofvariance (P<0.05). Results: The force decay of the TS chains were significantly lower than the TP chains in the6-week study duration (P<0.05), and the lowest and highest force decay was observed in the products by AOand GH, respectively. The highest force degradation occurred during the first week in all groups. The elongationrate needed for the TS chains was significantly higher than the TP chains (P<0.05), and the highest elongationrate was observed in the products by OR. TS chains showed significantly higher color stability than TP chains,and products by OR and GH had better color stability than the products by AO. Conclusion: The present studyshowed that TS chains were superior to TP chains in force decay and color stability in all the brands studied.KEYWORDSColor; Elastomeric; Force decay; Thermoplastic; Thermoset. |
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UNESP-20_08f46ab2c00442a465ab7b3faf1a0739 |
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oai:ojs.pkp.sfu.ca:article/2612 |
network_acronym_str |
UNESP-20 |
network_name_str |
Brazilian Dental Science |
repository_id_str |
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spelling |
Force decay and discoloration of thermoplastic and thermoset orthodontic elastomeric chainsObjective: Elastomeric chains are commonly used to apply force for orthodontic dental movements. However,force decay and discoloration are two important weak points of these materials. The present study intended tocompare the force decay and color stability of different types of elastomeric chains. Material and Methods: Thisin vitro study evaluated 6 groups of elastomeric chains, including thermoplastic (TP) and thermoset (TS) chainsmade by the companies American Orthodontics (AO), Ormco (OR), and G&H Orthodontics (GH). The elastomericchain forces were measured at the baseline, following 1 hour, 1 day, 1, 2, 3, 4, 5, and 6 weeks of stretching.The elongation required for the chains to exert a force of 250 g was calculated. E of each group was calculatedby a spectrophotometer following immersion in black tea solution for 6 days. Data were analyzed using theSPSS 22 software and the statistical methods of repeated measures analysis of variance and two-way analysis ofvariance (P<0.05). Results: The force decay of the TS chains were significantly lower than the TP chains in the6-week study duration (P<0.05), and the lowest and highest force decay was observed in the products by AOand GH, respectively. The highest force degradation occurred during the first week in all groups. The elongationrate needed for the TS chains was significantly higher than the TP chains (P<0.05), and the highest elongationrate was observed in the products by OR. TS chains showed significantly higher color stability than TP chains,and products by OR and GH had better color stability than the products by AO. Conclusion: The present studyshowed that TS chains were superior to TP chains in force decay and color stability in all the brands studied.KEYWORDSColor; Elastomeric; Force decay; Thermoplastic; Thermoset.Institute of Science and Technology of São José dos Campos2022-03-29info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://ojs.ict.unesp.br/index.php/cob/article/view/261210.4322/bds.2022.e2612Brazilian Dental Science; Vol. 25 No. 1 (2022): Jan - Mar / 2022 Published Jan 2022Brazilian Dental Science; v. 25 n. 1 (2022): Jan - Mar / 2022 Published Jan 20222178-6011reponame:Brazilian Dental Scienceinstname:Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP)instacron:UNESPenghttps://ojs.ict.unesp.br/index.php/cob/article/view/2612/4479Copyright (c) 2022 Brazilian Dental Scienceinfo:eu-repo/semantics/openAccess Foroughi Moghaddam, SaeidDamavandi Kamali, Mohammad2022-01-20T16:23:54Zoai:ojs.pkp.sfu.ca:article/2612Revistahttp://bds.ict.unesp.br/PUBhttp://ojs.fosjc.unesp.br/index.php/index/oaisergio@fosjc.unesp.br||sergio@fosjc.unesp.br2178-60112178-6011opendoar:2022-11-08T16:30:38.168633Brazilian Dental Science - Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP)true |
dc.title.none.fl_str_mv |
Force decay and discoloration of thermoplastic and thermoset orthodontic elastomeric chains |
title |
Force decay and discoloration of thermoplastic and thermoset orthodontic elastomeric chains |
spellingShingle |
Force decay and discoloration of thermoplastic and thermoset orthodontic elastomeric chains Foroughi Moghaddam, Saeid |
title_short |
Force decay and discoloration of thermoplastic and thermoset orthodontic elastomeric chains |
title_full |
Force decay and discoloration of thermoplastic and thermoset orthodontic elastomeric chains |
title_fullStr |
Force decay and discoloration of thermoplastic and thermoset orthodontic elastomeric chains |
title_full_unstemmed |
Force decay and discoloration of thermoplastic and thermoset orthodontic elastomeric chains |
title_sort |
Force decay and discoloration of thermoplastic and thermoset orthodontic elastomeric chains |
author |
Foroughi Moghaddam, Saeid |
author_facet |
Foroughi Moghaddam, Saeid Damavandi Kamali, Mohammad |
author_role |
author |
author2 |
Damavandi Kamali, Mohammad |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Foroughi Moghaddam, Saeid Damavandi Kamali, Mohammad |
description |
Objective: Elastomeric chains are commonly used to apply force for orthodontic dental movements. However,force decay and discoloration are two important weak points of these materials. The present study intended tocompare the force decay and color stability of different types of elastomeric chains. Material and Methods: Thisin vitro study evaluated 6 groups of elastomeric chains, including thermoplastic (TP) and thermoset (TS) chainsmade by the companies American Orthodontics (AO), Ormco (OR), and G&H Orthodontics (GH). The elastomericchain forces were measured at the baseline, following 1 hour, 1 day, 1, 2, 3, 4, 5, and 6 weeks of stretching.The elongation required for the chains to exert a force of 250 g was calculated. E of each group was calculatedby a spectrophotometer following immersion in black tea solution for 6 days. Data were analyzed using theSPSS 22 software and the statistical methods of repeated measures analysis of variance and two-way analysis ofvariance (P<0.05). Results: The force decay of the TS chains were significantly lower than the TP chains in the6-week study duration (P<0.05), and the lowest and highest force decay was observed in the products by AOand GH, respectively. The highest force degradation occurred during the first week in all groups. The elongationrate needed for the TS chains was significantly higher than the TP chains (P<0.05), and the highest elongationrate was observed in the products by OR. TS chains showed significantly higher color stability than TP chains,and products by OR and GH had better color stability than the products by AO. Conclusion: The present studyshowed that TS chains were superior to TP chains in force decay and color stability in all the brands studied.KEYWORDSColor; Elastomeric; Force decay; Thermoplastic; Thermoset. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-03-29 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://ojs.ict.unesp.br/index.php/cob/article/view/2612 10.4322/bds.2022.e2612 |
url |
https://ojs.ict.unesp.br/index.php/cob/article/view/2612 |
identifier_str_mv |
10.4322/bds.2022.e2612 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://ojs.ict.unesp.br/index.php/cob/article/view/2612/4479 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2022 Brazilian Dental Science info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2022 Brazilian Dental Science |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Institute of Science and Technology of São José dos Campos |
publisher.none.fl_str_mv |
Institute of Science and Technology of São José dos Campos |
dc.source.none.fl_str_mv |
Brazilian Dental Science; Vol. 25 No. 1 (2022): Jan - Mar / 2022 Published Jan 2022 Brazilian Dental Science; v. 25 n. 1 (2022): Jan - Mar / 2022 Published Jan 2022 2178-6011 reponame:Brazilian Dental Science instname:Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Brazilian Dental Science |
collection |
Brazilian Dental Science |
repository.name.fl_str_mv |
Brazilian Dental Science - Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP) |
repository.mail.fl_str_mv |
sergio@fosjc.unesp.br||sergio@fosjc.unesp.br |
_version_ |
1788346902222209024 |