Mechanical strength of stainless steel and titanium alloy mini-implants with different diameters : an experimental laboratory study
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/256479 |
Resumo: | Background: The mechanical strength of mini-implants is a critical factor due to their small diameters. Currently, it is not possible to state whether there is a relevant difference between the mechanical properties of stainless steel (SS-MIs) and titanium alloy mini-implants (TA-MIs). The objective of this study was to test the null hypothesis that there is no difference in the mechanical strength of SS-MIs and TA-MIs, and to analyze, by scanning electron microscopy (SEM), the SS-MI, and TA-MI threads resistance to morphological damage after insertion. Methods: A standardized sample of 504 SS-MIs and TA-MIs with diameters ranging from 1.2 mm to 1.8 mm was used. Torsional fracture was performed in 154 MIs. Flexural strength of 280 MIs was evaluated at 1 mm and 2 mmdeflection. The threads of 70 MIs were morphologically analyzed by scanning electron microscopy (SEM), before and after their insertion in high-density artificial bone blocks. Comparisons between SS-MIs and TA-MIs were performed with t tests or Mann-Whitney U tests. A multiple linear regression analysis was used to evaluate the influence of variables on the ranging of MI mechanical strength. Results: SS-MIs had higher fracture torque. The mean difference between the SS-MIs and TA-MIs fracture torque was of 4.09 Ncm. The MI diameter explained 90.3% of the total variation in fracture torque, while only 2.2% was explained by the metallic alloy. The SS-MI group presented a higher deformation force during the 1mm and 2mmdeflection. The mean difference between the flexural strength of SS and TA-MIs at 1 mm and 2 mm-deflection was of 18.21 N and 17.55 N, respectively. There was no noticeable morphological damage to the threads of SS-MIs and TA-MIs. Conclusions: The null hypothesis was rejected. SS-MIs were 13.2% and 20.2% more resistant to torsional fracture and deflection, respectively. The threads of the SS-MIs and TA-MIs were not damaged during the insertion and removal process. Thus, the use of SS-MI can reduce the fracture risk without increasing the MI diameter. |
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Barros, Sérgio Estelita CavalcanteVanz, VivianeChiqueto, Kelly Fernanda GalvãoJanson, GuilhermeFerreira, Eduardo Silveira2023-03-30T03:23:12Z20212196-1042http://hdl.handle.net/10183/256479001163723Background: The mechanical strength of mini-implants is a critical factor due to their small diameters. Currently, it is not possible to state whether there is a relevant difference between the mechanical properties of stainless steel (SS-MIs) and titanium alloy mini-implants (TA-MIs). The objective of this study was to test the null hypothesis that there is no difference in the mechanical strength of SS-MIs and TA-MIs, and to analyze, by scanning electron microscopy (SEM), the SS-MI, and TA-MI threads resistance to morphological damage after insertion. Methods: A standardized sample of 504 SS-MIs and TA-MIs with diameters ranging from 1.2 mm to 1.8 mm was used. Torsional fracture was performed in 154 MIs. Flexural strength of 280 MIs was evaluated at 1 mm and 2 mmdeflection. The threads of 70 MIs were morphologically analyzed by scanning electron microscopy (SEM), before and after their insertion in high-density artificial bone blocks. Comparisons between SS-MIs and TA-MIs were performed with t tests or Mann-Whitney U tests. A multiple linear regression analysis was used to evaluate the influence of variables on the ranging of MI mechanical strength. Results: SS-MIs had higher fracture torque. The mean difference between the SS-MIs and TA-MIs fracture torque was of 4.09 Ncm. The MI diameter explained 90.3% of the total variation in fracture torque, while only 2.2% was explained by the metallic alloy. The SS-MI group presented a higher deformation force during the 1mm and 2mmdeflection. The mean difference between the flexural strength of SS and TA-MIs at 1 mm and 2 mm-deflection was of 18.21 N and 17.55 N, respectively. There was no noticeable morphological damage to the threads of SS-MIs and TA-MIs. Conclusions: The null hypothesis was rejected. SS-MIs were 13.2% and 20.2% more resistant to torsional fracture and deflection, respectively. The threads of the SS-MIs and TA-MIs were not damaged during the insertion and removal process. Thus, the use of SS-MI can reduce the fracture risk without increasing the MI diameter.application/pdfengProgress in Orthodontics. Copenhagen. Vol. 22, no. 1 (2021), 9 p.Procedimentos de ancoragem ortodônticaAço inoxidávelMini-implantOrthodontic anchorageFlexural strengthTorsional strengthStainless SteelTitanium alloyMechanical strength of stainless steel and titanium alloy mini-implants with different diameters : an experimental laboratory studyEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001163723.pdf.txt001163723.pdf.txtExtracted Texttext/plain35552http://www.lume.ufrgs.br/bitstream/10183/256479/2/001163723.pdf.txtaea764884839f307dc243f68034c096aMD52ORIGINAL001163723.pdfTexto completo (inglês)application/pdf1433765http://www.lume.ufrgs.br/bitstream/10183/256479/1/001163723.pdf6e3b6c8d8254bc9709a0ff3b9de201ecMD5110183/2564792023-03-31 03:23:14.596823oai:www.lume.ufrgs.br:10183/256479Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-03-31T06:23:14Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Mechanical strength of stainless steel and titanium alloy mini-implants with different diameters : an experimental laboratory study |
title |
Mechanical strength of stainless steel and titanium alloy mini-implants with different diameters : an experimental laboratory study |
spellingShingle |
Mechanical strength of stainless steel and titanium alloy mini-implants with different diameters : an experimental laboratory study Barros, Sérgio Estelita Cavalcante Procedimentos de ancoragem ortodôntica Aço inoxidável Mini-implant Orthodontic anchorage Flexural strength Torsional strength Stainless Steel Titanium alloy |
title_short |
Mechanical strength of stainless steel and titanium alloy mini-implants with different diameters : an experimental laboratory study |
title_full |
Mechanical strength of stainless steel and titanium alloy mini-implants with different diameters : an experimental laboratory study |
title_fullStr |
Mechanical strength of stainless steel and titanium alloy mini-implants with different diameters : an experimental laboratory study |
title_full_unstemmed |
Mechanical strength of stainless steel and titanium alloy mini-implants with different diameters : an experimental laboratory study |
title_sort |
Mechanical strength of stainless steel and titanium alloy mini-implants with different diameters : an experimental laboratory study |
author |
Barros, Sérgio Estelita Cavalcante |
author_facet |
Barros, Sérgio Estelita Cavalcante Vanz, Viviane Chiqueto, Kelly Fernanda Galvão Janson, Guilherme Ferreira, Eduardo Silveira |
author_role |
author |
author2 |
Vanz, Viviane Chiqueto, Kelly Fernanda Galvão Janson, Guilherme Ferreira, Eduardo Silveira |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Barros, Sérgio Estelita Cavalcante Vanz, Viviane Chiqueto, Kelly Fernanda Galvão Janson, Guilherme Ferreira, Eduardo Silveira |
dc.subject.por.fl_str_mv |
Procedimentos de ancoragem ortodôntica Aço inoxidável |
topic |
Procedimentos de ancoragem ortodôntica Aço inoxidável Mini-implant Orthodontic anchorage Flexural strength Torsional strength Stainless Steel Titanium alloy |
dc.subject.eng.fl_str_mv |
Mini-implant Orthodontic anchorage Flexural strength Torsional strength Stainless Steel Titanium alloy |
description |
Background: The mechanical strength of mini-implants is a critical factor due to their small diameters. Currently, it is not possible to state whether there is a relevant difference between the mechanical properties of stainless steel (SS-MIs) and titanium alloy mini-implants (TA-MIs). The objective of this study was to test the null hypothesis that there is no difference in the mechanical strength of SS-MIs and TA-MIs, and to analyze, by scanning electron microscopy (SEM), the SS-MI, and TA-MI threads resistance to morphological damage after insertion. Methods: A standardized sample of 504 SS-MIs and TA-MIs with diameters ranging from 1.2 mm to 1.8 mm was used. Torsional fracture was performed in 154 MIs. Flexural strength of 280 MIs was evaluated at 1 mm and 2 mmdeflection. The threads of 70 MIs were morphologically analyzed by scanning electron microscopy (SEM), before and after their insertion in high-density artificial bone blocks. Comparisons between SS-MIs and TA-MIs were performed with t tests or Mann-Whitney U tests. A multiple linear regression analysis was used to evaluate the influence of variables on the ranging of MI mechanical strength. Results: SS-MIs had higher fracture torque. The mean difference between the SS-MIs and TA-MIs fracture torque was of 4.09 Ncm. The MI diameter explained 90.3% of the total variation in fracture torque, while only 2.2% was explained by the metallic alloy. The SS-MI group presented a higher deformation force during the 1mm and 2mmdeflection. The mean difference between the flexural strength of SS and TA-MIs at 1 mm and 2 mm-deflection was of 18.21 N and 17.55 N, respectively. There was no noticeable morphological damage to the threads of SS-MIs and TA-MIs. Conclusions: The null hypothesis was rejected. SS-MIs were 13.2% and 20.2% more resistant to torsional fracture and deflection, respectively. The threads of the SS-MIs and TA-MIs were not damaged during the insertion and removal process. Thus, the use of SS-MI can reduce the fracture risk without increasing the MI diameter. |
publishDate |
2021 |
dc.date.issued.fl_str_mv |
2021 |
dc.date.accessioned.fl_str_mv |
2023-03-30T03:23:12Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/256479 |
dc.identifier.issn.pt_BR.fl_str_mv |
2196-1042 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001163723 |
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2196-1042 001163723 |
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http://hdl.handle.net/10183/256479 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Progress in Orthodontics. Copenhagen. Vol. 22, no. 1 (2021), 9 p. |
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info:eu-repo/semantics/openAccess |
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openAccess |
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