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https://hdl.handle.net/1822/52768
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Campo DC | Valor | Idioma |
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dc.contributor.author | de Castro, Saul Matos | por |
dc.contributor.author | Moreira, Rui | por |
dc.contributor.author | Braga, A. C. | por |
dc.contributor.author | Ferreira, Afonso Pinhao | por |
dc.contributor.author | Pollmann, Maria Cristina | por |
dc.date.accessioned | 2018-03-19T11:36:26Z | - |
dc.date.available | 2018-03-19T11:36:26Z | - |
dc.date.issued | 2015-07-01 | - |
dc.identifier.issn | 2234-7518 | - |
dc.identifier.uri | https://hdl.handle.net/1822/52768 | - |
dc.description.abstract | Objective: To quantify, for each activation, the effect of preactivations of differing distribution and intensity on the neutral position of T-loops (7-mm height), specifically the horizontal force, moment to force (M/F) ratio, and load to deflection ratio. Methods: A total 100 loops measuring 0.017 x 0.025 inches in cross-section were divided into two groups (n = 50 each) according to composition, either stainless steel or beta-titanium. The two groups were further divided into five subgroups, 10 loops each, corresponding to the five preactivations tested: preactivations with occlusal distribution (00, 200, and 401, gingival distribution (201, and occlusal-gingival distribution (40). The loops were subjected to a total activation of 6-mm with 0.5-mm iterations. Statistical analysis was performed using comprised ANOVA and Bonferoni multiple comparison tests, with a significance level of 5%. Results: The location and intensity of preactivation influenced the force intensity. For the M/F ratio, the highest value achieved without preactivation was lower than the height of the loop. Without preactivation, the M/F ratio increased with activation, while the opposite effect was observed with preactivation. The increase in the M/F ratio was greater when the preactivation distribution was partially or fully gingival. Conclusions: Depending on the preactivation distribution, displacement of uprights is higher or lower than the activation, which is a factor to consider in clinical practice. | por |
dc.description.sponsorship | This study was carried out and financed by the Faculty of Dental Medicine of University of Porto. | por |
dc.language.iso | eng | por |
dc.publisher | Korean Association of Orthodontists | por |
dc.rights | openAccess | por |
dc.subject | Neutral position | por |
dc.subject | Preactivation | por |
dc.subject | T-loop | por |
dc.title | Effect of activation and preactivation on the mechanical behavior and neutral position of stainless steel and beta-titanium T-loops | por |
dc.type | article | por |
dc.peerreviewed | yes | por |
oaire.citationStartPage | 198 | por |
oaire.citationEndPage | 208 | por |
oaire.citationIssue | 4 | por |
oaire.citationVolume | 45 | por |
dc.date.updated | 2018-03-14T16:43:39Z | - |
dc.identifier.doi | 10.4041/kjod.2015.45.4.198 | por |
dc.description.publicationversion | info:eu-repo/semantics/publishedVersion | por |
dc.subject.wos | Science & Technology | - |
sdum.export.identifier | 4508 | - |
sdum.journal | Korean Journal of Orthodontics | por |
Aparece nas coleções: | CAlg - Artigos em revistas internacionais / Papers in international journals |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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RevInd3_2015_KJO14_Saul.pdf | 976,3 kB | Adobe PDF | Ver/Abrir |